Merge pull request #80 from simulton/master

Hide tab before emitting event

.appveyor.yml

@@ -0,0 +1,160 @@
+version: '2.3.2.{build}'
+branches:
+  only:
+    - master
+
+image: Visual Studio 2015
+clone_depth: 1
+environment:
+  global:
+    # Appveyor doesn't have Qt 12 yet
+    LatestLTSQtVersion: 5.9
+    LatestQtVersion: 5.11
+  matrix:
+    # Latest version of Qt, dll, 64bit, MSVC 2015, qmake
+  - QT5: C:\Qt\%LatestQtVersion%\msvc2015_64
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: amd64
+    use_mingw: "false"
+    use_static: "false"
+    use_cmake: "false"
+# 32 bit builds
+# MSVC 2015 builds
+# Dynamic Library builds
+    # LTS version of Qt, dll, 32bit, MSVC 2015, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: x86
+    use_mingw: "false"
+    use_static: "false"
+    use_cmake: "false"
+    # LTS version of Qt, dll, 32bit, MSVC 2015, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: x86
+    use_mingw: "false"
+    use_static: "false"
+    use_cmake: "true"
+# end Dynamic Library builds
+# Static Library builds
+    # LTS version of Qt, static, 32bit, MSVC 2015, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: x86
+    use_mingw: "false"
+    use_static: "true"
+    use_cmake: "false"
+    # LTS version of Qt, static, 32bit, MSVC 2015, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: x86
+    use_mingw: "false"
+    use_static: "true"
+    use_cmake: "true"
+# end Static Library builds
+# end MSVC 2015 builds
+# MinGW builds
+# Dynamic Library builds
+    # LTS version of Qt, dll, 32bit, MinGW, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\mingw53_32
+    COMPILER: C:\Qt\Tools\mingw530_32
+    targetPlatform: x86
+    use_mingw: "true"
+    use_static: "false"
+    use_cmake: "false"
+    # LTS version of Qt, dll, 32bit, MinGW, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\mingw53_32
+    COMPILER: C:\Qt\Tools\mingw530_32
+    targetPlatform: x86
+    use_mingw: "true"
+    use_static: "false"
+    use_cmake: "true"
+# end Dynamic Library builds
+# Static Library builds
+    # LTS version of Qt, static, 32bit, MinGW, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\mingw53_32
+    COMPILER: C:\Qt\Tools\mingw530_32
+    targetPlatform: x86
+    use_mingw: "true"
+    use_static: "true"
+    use_cmake: "false"
+    # LTS version of Qt, static, 32bit, MinGW, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\mingw53_32
+    COMPILER: C:\Qt\Tools\mingw530_32
+    targetPlatform: x86
+    use_mingw: "true"
+    use_static: "true"
+    use_cmake: "true"
+# end Static Library builds
+# end MinGW builds
+# end 32 bit builds
+# 64 bit builds
+# MSVC 2015 builds
+# Dynamic Library builds
+    # LTS version of Qt, dll, 64bit, MSVC 2015, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015_64
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: amd64
+    use_mingw: "false"
+    use_static: "false"
+    use_cmake: "false"
+    # LTS version of Qt, dll, 64bit, MSVC 2015, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015_64
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: amd64
+    use_mingw: "false"
+    use_static: "false"
+    use_cmake: "true"
+# end Dynamic Library builds
+# Static Library builds
+    # LTS version of Qt, static, 64bit, MSVC 2015, qmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015_64
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: amd64
+    use_mingw: "false"
+    use_static: "true"
+    use_cmake: "false"
+    # LTS version of Qt, static, 64bit, MSVC 2015, cmake
+  - QT5: C:\Qt\%LatestLTSQtVersion%\msvc2015_64
+    COMPILER: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC
+    targetPlatform: amd64
+    use_mingw: "false"
+    use_static: "true"
+    use_cmake: "true"
+# end Static Library builds
+# end MSVC 2015 builds
+# end 64 bit builds
+
+matrix:
+  fast_finish: true
+
+before_build:
+- set PATH=%COMPILER%\bin;%QT5%\bin;%PATH%
+- set originalWD=%CD%
+- call "%QT5%\bin\qtenv2.bat"
+- cd %originalWD%
+- if %use_mingw%==false call "%COMPILER%\vcvarsall.bat" %targetPlatform%
+- if %use_static%==true (set USESTATIC=ON) else (set USESTATIC=OFF)
+- if %use_mingw%==true (set CMAKEGENERATOR="MinGW Makefiles") else (set CMAKEGENERATOR="NMake Makefiles")
+- if %use_mingw%==true (set MAKEENGINE=mingw32-make) else (set MAKEENGINE=nmake)
+- if %use_mingw%==true set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
+
+build_script:
+- if %use_cmake%==true mkdir .\build 
+- if %use_cmake%==true cd .\build
+- if %use_cmake%==true cmake --version
+- if %use_cmake%==true cmake -G %CMAKEGENERATOR% -DCMAKE_BUILD_TYPE=DEBUG -DBUILD_EXAMPLES=ON -DCMAKE_DEBUG_POSTFIX=d -DBUILD_STATIC=%USESTATIC% -DCMAKE_INSTALL_PREFIX="./installed" ../
+- if %use_cmake%==true cmake --build .
+- if %use_cmake%==true cmake --build . --target install
+- if %use_cmake%==true cmake -G %CMAKEGENERATOR% -DCMAKE_BUILD_TYPE=RELEASE -DBUILD_EXAMPLES=ON -DBUILD_STATIC=%USESTATIC% -DCMAKE_INSTALL_PREFIX="./installed" ../
+- if %use_cmake%==true cmake --build .
+- if %use_cmake%==true cmake --build . --target install
+- if %use_cmake%==false if %use_static%==true qmake "CONFIG+=adsBuildStatic"
+- if %use_cmake%==false if %use_static%==false qmake
+- if %use_cmake%==false %MAKEENGINE% debug
+- if %use_cmake%==false %MAKEENGINE% install
+- if %use_cmake%==false %MAKEENGINE% release
+- if %use_cmake%==false %MAKEENGINE% install
+
+after_build:
+- if %use_mingw%==true set PATH=C:\Program Files\Git\usr\bin;%PATH%

.cproject

@@ -83,6 +83,7 @@
 			</target>
 			<target name="Clean" path=" build" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
+				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -99,7 +100,6 @@
 			<target name="qmake" path=" build" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>qmake</buildCommand>
 				<buildArguments>-recursive ../ads.pro</buildArguments>
-				<buildTarget/>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>false</useDefaultCommand>
 				<runAllBuilders>false</runAllBuilders>
@@ -122,7 +122,6 @@
 			</target>
 			<target name="Clean" path=" build/src" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
-				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -139,7 +138,6 @@
 			<target name="qmake" path=" build/src" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>qmake</buildCommand>
 				<buildArguments>-recursive ../../src/src.pro</buildArguments>
-				<buildTarget/>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>false</useDefaultCommand>
 				<runAllBuilders>false</runAllBuilders>
@@ -152,6 +150,46 @@
 				<useDefaultCommand>false</useDefaultCommand>
 				<runAllBuilders>false</runAllBuilders>
 			</target>
+			<target name="Build all" path=" build/example" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>mingw32-make</buildCommand>
+				<buildArguments>-j</buildArguments>
+				<buildTarget>all</buildTarget>
+				<stopOnError>false</stopOnError>
+				<useDefaultCommand>false</useDefaultCommand>
+				<runAllBuilders>false</runAllBuilders>
+			</target>
+			<target name="Clean" path=" build/example" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>make</buildCommand>
+				<buildArguments/>
+				<buildTarget>clean</buildTarget>
+				<stopOnError>false</stopOnError>
+				<useDefaultCommand>true</useDefaultCommand>
+				<runAllBuilders>false</runAllBuilders>
+			</target>
+			<target name="Debug Build" path=" build/example" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>mingw32-make</buildCommand>
+				<buildArguments>-j6</buildArguments>
+				<buildTarget>debug</buildTarget>
+				<stopOnError>false</stopOnError>
+				<useDefaultCommand>false</useDefaultCommand>
+				<runAllBuilders>false</runAllBuilders>
+			</target>
+			<target name="qmake" path=" build/example" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>qmake</buildCommand>
+				<buildArguments>-recursive ../../example/example.pro</buildArguments>
+				<buildTarget/>
+				<stopOnError>true</stopOnError>
+				<useDefaultCommand>false</useDefaultCommand>
+				<runAllBuilders>false</runAllBuilders>
+			</target>
+			<target name="Release Build" path=" build/example" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
+				<buildCommand>mingw32-make</buildCommand>
+				<buildArguments>-j4</buildArguments>
+				<buildTarget>release</buildTarget>
+				<stopOnError>false</stopOnError>
+				<useDefaultCommand>false</useDefaultCommand>
+				<runAllBuilders>false</runAllBuilders>
+			</target>
 			<target name="Build all" path=" build/demo" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>mingw32-make</buildCommand>
 				<buildArguments>-j</buildArguments>
@@ -162,7 +200,6 @@
 			</target>
 			<target name="Clean" path=" build/demo" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
-				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -179,7 +216,6 @@
 			<target name="qmake" path=" build/demo" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>qmake</buildCommand>
 				<buildArguments>-recursive ../../demo/demo.pro</buildArguments>
-				<buildTarget/>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>false</useDefaultCommand>
 				<runAllBuilders>false</runAllBuilders>
@@ -202,6 +238,7 @@
 			</target>
 			<target name="Clean" path=" build/AdvancedDockingSystemDemo" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
+				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -240,6 +277,7 @@
 			</target>
 			<target name="Clean" path=" build/AdvancedDockingSystemDemo_v2" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
+				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -278,6 +316,7 @@
 			</target>
 			<target name="Clean" path=" build/AdvancedDockingSystem" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>make</buildCommand>
+				<buildArguments/>
 				<buildTarget>clean</buildTarget>
 				<stopOnError>false</stopOnError>
 				<useDefaultCommand>true</useDefaultCommand>
@@ -294,7 +333,6 @@
 			<target name="qmake" path=" build/AdvancedDockingSystem" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
 				<buildCommand>qmake</buildCommand>
 				<buildArguments>-recursive ../../AdvancedDockingSystem/src.pro</buildArguments>
-				<buildTarget/>
 				<stopOnError>true</stopOnError>
 				<useDefaultCommand>false</useDefaultCommand>
 				<runAllBuilders>false</runAllBuilders>

.gitignore

@@ -1,2 +1,18 @@
 *.pro.user
-/ build
+/build
+*.o
+*.dylib
+*.app
+qrc_*
+moc_*
+ui_*
+Makefile
+
+# IDEs
+.idea
+
+# Python
+.eggs
+*.pyc
+*.pyd
+__pycache__

.travis.yml

@@ -0,0 +1,155 @@
+language: cpp
+# gcc is clang on mac
+compiler: gcc
+
+git:
+  depth: 1
+
+matrix:
+  fast_finish: true
+  include:
+  - name: Ubuntu qmake Qt5.5.1
+    os: linux
+    dist: trusty
+    group: stable
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - sourceline: 'ppa:beineri/opt-qt551-trusty'
+        update: true
+        packages:
+        - qt55base
+        - qt55tools
+        - gcc-6
+        - g++-6
+        - libc6-i386
+    script:
+        - PATH="/opt/qt55/bin:$PATH"
+        - CXX="g++-6"
+        - CC="gcc-6"
+        - qt55-env.sh
+        - qmake
+        - make
+        - make install
+  - name: Ubuntu qmake dll
+    os: linux
+    dist: xenial
+    group: stable
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - sourceline: 'ppa:beineri/opt-qt-5.12.0-xenial'
+        update: true
+        packages:
+        - qt512base
+        - qt512tools
+        - gcc-6
+        - g++-6
+        - libc6-i386
+        - libgl-dev
+        - libgl1-mesa-dev
+        - mesa-common-dev
+    script:
+        - PATH="/opt/qt512/bin:$PATH"
+        - CXX="g++-6"
+        - CC="gcc-6"
+        - qt512-env.sh
+        - qmake
+        - make
+        - make install
+  - name: Ubuntu qmake static
+    os: linux
+    dist: xenial
+    group: stable
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        - sourceline: 'ppa:beineri/opt-qt-5.12.0-xenial'
+        update: true
+        packages:
+        - qt512base
+        - qt512tools
+        - gcc-6
+        - g++-6
+        - libc6-i386
+        - libgl-dev
+        - libgl1-mesa-dev
+        - mesa-common-dev
+    script:
+        - PATH="/opt/qt512/bin:$PATH"
+        - CXX="g++-6"
+        - CC="gcc-6"
+        - qt512-env.sh
+        - qmake "CONFIG+=adsBuildStatic"
+        - make
+        - make install
+  - name: macOS CMake dll
+    os: osx
+    osx_image: xcode10.1
+    addons:
+      homebrew:
+        packages:
+        - qt
+        update: true
+    script:
+        - PATH="/usr/local/opt/qt5/bin:$PATH"
+        - mkdir -p build
+        - cd build
+        - cmake --version
+        - cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=DEBUG -DCMAKE_DEBUG_POSTFIX=_debug -DBUILD_EXAMPLES=ON -DBUILD_STATIC=OFF -DCMAKE_INSTALL_PREFIX="./installed" ../
+        - cmake --build .
+        - cmake --build . --target install
+        - cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=RELEASE -DBUILD_EXAMPLES=ON -DBUILD_STATIC=OFF -DCMAKE_INSTALL_PREFIX="./installed" ../
+        - cmake --build .
+        - cmake --build . --target install
+  - name: macOS CMake static
+    os: osx
+    osx_image: xcode10.1
+    addons:
+      homebrew:
+        packages:
+        - qt
+        update: true
+    script:
+        - PATH="/usr/local/opt/qt5/bin:$PATH"
+        - mkdir -p build
+        - cd build
+        - cmake --version
+        - cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=DEBUG -DCMAKE_DEBUG_POSTFIX=_debug -DBUILD_EXAMPLES=ON -DBUILD_STATIC=ON -DCMAKE_INSTALL_PREFIX="./installed" ../
+        - cmake --build .
+        - cmake --build . --target install
+        - cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=RELEASE -DBUILD_EXAMPLES=ON -DBUILD_STATIC=ON -DCMAKE_INSTALL_PREFIX="./installed" ../
+        - cmake --build .
+        - cmake --build . --target install
+  - name: macOS qmake dll
+    os: osx
+    osx_image: xcode10.1
+    addons:
+      homebrew:
+        packages:
+        - qt
+        update: true
+    script:
+        - PATH="/usr/local/opt/qt5/bin:$PATH"
+        - qmake
+        - make
+        - make install
+  - name: macOS qmake static
+    os: osx
+    osx_image: xcode10.1
+    addons:
+      homebrew:
+        packages:
+        - qt
+        update: true
+    script:
+        - PATH="/usr/local/opt/qt5/bin:$PATH"
+        - qmake "CONFIG+=adsBuildStatic"
+        - make
+        - make install
+notifications:
+  email: false
+

CMakeLists.txt

@@ -0,0 +1,121 @@
+cmake_minimum_required(VERSION 3.3)
+set(ads_VERSION "2.3.2")
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+project(QtAdvancedDockingSystem VERSION ${ads_VERSION})
+option(BUILD_STATIC "Build the static library" OFF)
+option(BUILD_EXAMPLES "Build the examples" ON)
+set(REQUIRED_QT_VERSION 5.5.0)
+find_package(Qt5Core ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Gui ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Widgets ${REQUIRED_QT_VERSION} REQUIRED)
+message(STATUS "Found Qt ${Qt5Core_VERSION}")
+set(ads_INCLUDE ${ads_INCLUDE} ${Qt5Core_INCLUDE_DIRS})
+set(ads_INCLUDE ${ads_INCLUDE} "${CMAKE_CURRENT_SOURCE_DIR}/src")
+set(ads_LIBS ${ads_LIBS} ${Qt5Core_LIBRARIES})
+set(ads_COMPILE_DEFINE ${ads_COMPILE_DEFINE} ${Qt5Core_COMPILE_DEFINITIONS})
+set(ads_LIBS ${ads_LIBS} ${Qt5Gui_LIBRARIES})
+set(ads_INCLUDE ${ads_INCLUDE} ${Qt5Gui_INCLUDE_DIRS})
+set(ads_COMPILE_DEFINE ${ads_COMPILE_DEFINE} ${Qt5Gui_COMPILE_DEFINITIONS})
+set(ads_LIBS ${ads_LIBS} ${Qt5Widgets_LIBRARIES})
+set(ads_INCLUDE ${ads_INCLUDE} ${Qt5Widgets_INCLUDE_DIRS})
+set(ads_COMPILE_DEFINE ${ads_COMPILE_DEFINE} ${Qt5Widgets_COMPILE_DEFINITIONS})
+if(BUILD_STATIC)
+    set(CMAKE_STATIC_LIBRARY_SUFFIX "_static${CMAKE_STATIC_LIBRARY_SUFFIX}")
+endif()
+set(ads_SRCS
+    src/ads_globals.cpp
+    src/DockAreaTabBar.cpp
+    src/DockAreaTitleBar.cpp
+    src/DockAreaWidget.cpp
+    src/DockContainerWidget.cpp
+    src/DockManager.cpp
+    src/DockOverlay.cpp
+    src/DockSplitter.cpp
+    src/DockWidget.cpp
+    src/DockWidgetTab.cpp
+    src/ElidingLabel.cpp
+    src/FloatingDockContainer.cpp
+    src/ads.qrc
+    src/linux/FloatingWidgetTitleBar.cpp
+)
+set(ads_INSTALL_INCLUDE 
+    src/ads_globals.h
+    src/DockAreaTabBar.h
+    src/DockAreaTitleBar.h
+    src/DockAreaWidget.h
+    src/DockContainerWidget.h
+    src/DockManager.h
+    src/DockOverlay.h
+    src/DockSplitter.h
+    src/DockWidget.h
+    src/DockWidgetTab.h
+    src/ElidingLabel.h
+    src/FloatingDockContainer.h
+    src/linux/FloatingWidgetTitleBar.h
+)
+if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")
+    set(ads_PlatformDir "x86")
+else()
+    set(ads_PlatformDir "x64")
+endif()
+if(BUILD_STATIC)
+    add_library(qtadvanceddocking STATIC ${ads_SRCS})
+    target_compile_definitions(qtadvanceddocking PUBLIC ADS_STATIC)
+else()
+    add_library(qtadvanceddocking SHARED ${ads_SRCS})
+    set(ads_COMPILE_DEFINE ${ads_COMPILE_DEFINE} ADS_SHARED_EXPORT)
+endif()
+install(FILES ${ads_INSTALL_INCLUDE}
+    DESTINATION include 
+    COMPONENT headers
+)
+install(FILES 
+    "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE.md"
+    "${CMAKE_CURRENT_SOURCE_DIR}/gnu-lgpl-v2.1.md"
+    DESTINATION license 
+    COMPONENT license
+)
+install(TARGETS qtadvanceddocking
+    EXPORT adsTargets
+    RUNTIME DESTINATION bin
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib
+    INCLUDES DESTINATION include
+)
+
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file("adsConfigVersion.cmake"
+    VERSION ${ads_VERSION}
+    COMPATIBILITY SameMajorVersion
+)
+install(EXPORT adsTargets
+    FILE adsTargets.cmake
+    NAMESPACE ads::
+    DESTINATION lib/cmake/ads
+)
+install(FILES "adsConfig.cmake" "${CMAKE_BINARY_DIR}/adsConfigVersion.cmake"
+    DESTINATION lib/cmake/ads
+)
+
+target_include_directories(qtadvanceddocking PUBLIC 
+    "$<BUILD_INTERFACE:${ads_INCLUDE}>"
+    $<INSTALL_INTERFACE:include>
+    )
+target_link_libraries(qtadvanceddocking PUBLIC ${ads_LIBS})
+target_compile_definitions(qtadvanceddocking PRIVATE ${ads_COMPILE_DEFINE})
+set_target_properties(qtadvanceddocking PROPERTIES 
+    VERSION ${ads_VERSION}
+    EXPORT_NAME "QtAdvancedDockingSystem"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/bin"
+)
+if(BUILD_EXAMPLES)
+    add_subdirectory(example)
+    add_subdirectory(demo)
+endif()
+

PyQtAds/QtAds/__init__.py

@@ -0,0 +1,10 @@
+from .ads import ads
+from .._version import *
+
+import inspect
+
+for name, member in inspect.getmembers(ads):
+    if not name.startswith('_'):
+        globals()[name] = member
+        
+del ads

PyQtAds/__init__.py

@@ -0,0 +1 @@
+from .rc import *

PyQtAds/_version.py

@@ -0,0 +1,9 @@
+# THIS FILE IS GENERATED FROM PyQtAds SETUP.PY
+
+short_version = '2.5.1'
+version = '2.5.1'
+full_version = '2.5.1'
+git_revision = 'c10ff7c688fb50fe9157bad3982164e0f955f9e4'
+release = True
+if not release:
+    version = full_version

PyQtAds/rc.py

@@ -0,0 +1,670 @@
+# -*- coding: utf-8 -*-
+
+# Resource object code
+#
+# Created by: The Resource Compiler for PyQt5 (Qt v5.9.7)
+#
+# WARNING! All changes made in this file will be lost!
+
+from PyQt5 import QtCore
+
+qt_resource_data = b"\
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+\x65\x64\x0d\x0a\x7b\x0d\x0a\x09\x62\x61\x63\x6b\x67\x72\x6f\x75\
+\x6e\x64\x3a\x20\x72\x67\x62\x61\x28\x30\x2c\x20\x30\x2c\x20\x30\
+\x2c\x20\x33\x32\x29\x3b\x0d\x0a\x7d\x0d\x0a\x0d\x0a\x0d\x0a\
+"
+
+qt_resource_name = b"\
+\x00\x03\
+\x00\x00\x67\xb3\
+\x00\x61\
+\x00\x64\x00\x73\
+\x00\x0b\
+\x0c\x6b\x3c\xf3\
+\x00\x73\
+\x00\x74\x00\x79\x00\x6c\x00\x65\x00\x73\x00\x68\x00\x65\x00\x65\x00\x74\x00\x73\
+\x00\x06\
+\x07\x03\x7d\xc3\
+\x00\x69\
+\x00\x6d\x00\x61\x00\x67\x00\x65\x00\x73\
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+\x00\x19\
+\x03\x4c\x6a\xc7\
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+\x00\x62\x00\x6c\x00\x65\x00\x64\x00\x2e\x00\x73\x00\x76\x00\x67\
+\x00\x11\
+\x0c\x15\xf2\x83\
+\x00\x64\
+\x00\x65\x00\x66\x00\x61\x00\x75\x00\x6c\x00\x74\x00\x5f\x00\x6c\x00\x69\x00\x6e\x00\x75\x00\x78\x00\x2e\x00\x63\x00\x73\x00\x73\
+\
+\x00\x0b\
+\x0c\xe2\x33\xa3\
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+"
+
+qt_resource_struct_v1 = b"\
+\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x01\
+\x00\x00\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x02\
+\x00\x00\x00\x28\x00\x02\x00\x00\x00\x02\x00\x00\x00\x06\
+\x00\x00\x00\x0c\x00\x02\x00\x00\x00\x02\x00\x00\x00\x04\
+\x00\x00\x00\x98\x00\x00\x00\x00\x00\x01\x00\x00\x17\x03\
+\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x01\x00\x00\x1d\x68\
+\x00\x00\x00\x60\x00\x00\x00\x00\x00\x01\x00\x00\x0b\x08\
+\x00\x00\x00\x3a\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\
+"
+
+qt_resource_struct_v2 = b"\
+\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x01\
+\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x02\
+\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x28\x00\x02\x00\x00\x00\x02\x00\x00\x00\x06\
+\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x0c\x00\x02\x00\x00\x00\x02\x00\x00\x00\x04\
+\x00\x00\x00\x00\x00\x00\x00\x00\
+\x00\x00\x00\x98\x00\x00\x00\x00\x00\x01\x00\x00\x17\x03\
+\x00\x00\x01\x6d\xaf\xb0\x91\x61\
+\x00\x00\x00\xc0\x00\x00\x00\x00\x00\x01\x00\x00\x1d\x68\
+\x00\x00\x01\x6d\xaf\xb0\x91\x60\
+\x00\x00\x00\x60\x00\x00\x00\x00\x00\x01\x00\x00\x0b\x08\
+\x00\x00\x01\x6d\xaf\xb0\x91\x5e\
+\x00\x00\x00\x3a\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\
+\x00\x00\x01\x6d\xaf\xb0\x91\x5e\
+"
+
+qt_version = QtCore.qVersion().split('.')
+if qt_version < ['5', '8', '0']:
+    rcc_version = 1
+    qt_resource_struct = qt_resource_struct_v1
+else:
+    rcc_version = 2
+    qt_resource_struct = qt_resource_struct_v2
+
+def qInitResources():
+    QtCore.qRegisterResourceData(rcc_version, qt_resource_struct, qt_resource_name, qt_resource_data)
+
+def qCleanupResources():
+    QtCore.qUnregisterResourceData(rcc_version, qt_resource_struct, qt_resource_name, qt_resource_data)
+
+qInitResources()

README.md

@@ -1,10 +1,15 @@
-# Advanced Docking System for Qt
+# Advanced Docking System for Qt 
+[![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+[![Build status](https://ci.appveyor.com/api/projects/status/qcfb3cy932jw9mpy/branch/master?svg=true)](https://ci.appveyor.com/project/githubuser0xFFFF/qt-advanced-docking-system/branch/master)
+[![License: LGPL v2.1](https://img.shields.io/badge/License-LGPL%20v2.1-blue.svg)](gnu-lgpl-v2.1.md)
+
+
 
 Qt Advanced Docking System lets you create customizable layouts using a full 
 featured window docking system similar to what is found in many popular 
 integrated development environements (IDEs) such as Visual Studio. 
 Everything is implemented with standard Qt functionality without any
-platform specific code. Basic usage of QWidgets an QLayouts and using basic 
+platform specific code. Basic usage of QWidgets and QLayouts and using basic 
 styles as much as possible.
 
 This work is based on and inspired by the 
@@ -13,28 +18,36 @@ from Manuel Freiholz. I did an almost complete rewrite of his code to improve
 code quality, readibility and to fix all issues from the issue tracker 
 of his docking system project.
 
+The following video gives a first impression what is possible with the Advanced Docking System for Qt.
+
+[![Video Advanced Docking](doc/advanced-docking_video.png)](https://www.youtube.com/watch?v=7pdNfafg3Qc)
+
 ## Features
 ### Docking everywhere - no central widget
 There is no central widget like in the Qt docking system. You can dock on every
 border of the main window or you can dock into each dock area - so you are
 free to dock almost everywhere.
 
-![Layout of widgets](preview.png) 
-
-![Dropping widgets](preview-dragndrop.png)
+![Dropping widgets](doc/preview-dragndrop.png)\
+\
+![Dropping widgets](doc/preview-dragndrop_dark.png)
 
 ### Docking inside floating windows
 There is no difference between the main window and a floating window. Docking
 into floating windows is supported.
 
-![Docking inside floating windows](floating-widget-dragndrop.png)
+![Docking inside floating windows](doc/floating-widget-dragndrop.png)\
+\
+![Docking inside floating windows](doc/floating-widget-dragndrop_dark.png)
 
 ### Grouped dragging
 When dragging the titlebar of a dock, all the tabs that are tabbed with it are 
 going to be dragged. So you can move complete groups of tabbed widgets into
 a floating widget or from one dock area to another one.
 
-![Grouped dragging](grouped-dragging.png)
+![Grouped dragging](doc/grouped-dragging.png)\
+\
+![Grouped dragging](doc/grouped-dragging_dark.png)
 
 ### Perspectives for fast switching of the complete main window layout
 A perspective defines the set and layout of dock windows in the main
@@ -43,19 +56,108 @@ perspective to make your own custom perspective. Later you can simply
 select a perspective from the perspective list to quickly switch the complete 
 main window layout.
 
-![Perspective](perspectives.png)
+![Perspective](doc/perspectives.png)\
+\
+![Perspective](doc/perspectives_dark.png)
 
 ## Tested Compatible Environments
-- Windows 10
+### Windows
+Windows 10 [![Build status](https://ci.appveyor.com/api/projects/status/qcfb3cy932jw9mpy/branch/master?svg=true)](https://ci.appveyor.com/project/githubuser0xFFFF/qt-advanced-docking-system/branch/master)
+
+The library was developed on and for Windows. It is used in a commercial Windows application and is therefore constantly tested.
+
+### macOS
+macOS [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+
+The application can be compiled for macOS. A user reported, that the library works on macOS. If have not tested it.
+
+### Linux
+Ubuntu [![Build Status](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System.svg?branch=master)](https://travis-ci.org/githubuser0xFFFF/Qt-Advanced-Docking-System)
+
+The application can be compiled for Linux and has been developed and tested with **Kubuntu 18.04**.
+
+![Advanced Docking on Linux](doc/linux_kubuntu_1804.png)
 
 ## Build
 Open the `ads.pro` with QtCreator and start the build, that's it.
 You can run the demo project and test it yourself.
 
+## Getting started / Example
+The following example shows the minimum code required to use the advanced Qt docking system.
+
+*MainWindow.h*
+
+```cpp
+#include <QMainWindow>
+#include "DockManager.h"
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+
+private:
+    Ui::MainWindow *ui;
+    
+    // The main container for docking
+    ads::CDockManager* m_DockManager;
+};
+```
+*MainWindow.cpp*
+```cpp
+#include "MainWindow.h"
+#include "ui_MainWindow.h"
+
+#include <QLabel>
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+
+    // Create the dock manager. Because the parent parameter is a QMainWindow
+    // the dock manager registers itself as the central widget.
+    m_DockManager = new ads::CDockManager(this);
+
+    // Create example content label - this can be any application specific
+    // widget
+    QLabel* l = new QLabel();
+    l->setWordWrap(true);
+    l->setAlignment(Qt::AlignTop | Qt::AlignLeft);
+    l->setText("Lorem ipsum dolor sit amet, consectetuer adipiscing elit. ");
+
+    // Create a dock widget with the title Label 1 and set the created label
+    // as the dock widget content
+    ads::CDockWidget* DockWidget = new ads::CDockWidget("Label 1");
+    DockWidget->setWidget(l);
+
+    // Add the toggleViewAction of the dock widget to the menu to give
+    // the user the possibility to show the dock widget if it has been closed
+    ui->menuView->addAction(DockWidget->toggleViewAction());
+
+    // Add the dock widget to the top dock widget area
+    m_DockManager->addDockWidget(ads::TopDockWidgetArea, DockWidget);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}
+```
+
 ## Developers
 - Uwe Kindler, Project Maintainer
 - Manuel Freiholz 
 
 ## License information
+[![License: LGPL v2.1](https://img.shields.io/badge/License-LGPL%20v2.1-blue.svg)](gnu-lgpl-v2.1.md)
 This project uses the [LGPLv2.1 license](gnu-lgpl-v2.1.md)
 

ads.pro

@@ -2,4 +2,8 @@ TEMPLATE = subdirs
 
 SUBDIRS = \
 	src \
-	demo
+	demo \
+	example
+
+demo.depends = src
+example.depends = src

adsConfig.cmake

@@ -0,0 +1,5 @@
+include(CMakeFindDependencyMacro)
+find_dependency(Qt5Core ${REQUIRED_QT_VERSION} REQUIRED)
+find_dependency(Qt5Gui ${REQUIRED_QT_VERSION} REQUIRED)
+find_dependency(Qt5Widgets ${REQUIRED_QT_VERSION} REQUIRED)
+include("${CMAKE_CURRENT_LIST_DIR}/adsTargets.cmake")

demo.py

@@ -0,0 +1,316 @@
+import datetime
+import logging
+
+from PyQt5.QtCore import (QCoreApplication, QDir, Qt, QSettings, QSignalBlocker,
+                         QRect)
+from PyQt5.QtGui import QGuiApplication
+from PyQt5.QtWidgets import (QCalendarWidget, QFileSystemModel, QFrame, QLabel,
+                            QMenu, QTreeView, QAction, QWidgetAction,
+                            QComboBox, QStyle, QSizePolicy, QInputDialog)
+
+from PyQt5 import QtWidgets
+
+from PyQtAds import QtAds
+
+
+class _State:
+    label_count = 0
+    calendar_count = 0
+    file_system_count = 0
+
+
+def create_long_text_label_dock_widget(view_menu: QMenu) -> QtAds.CDockWidget:
+    '''
+    Create long text label dock widget
+
+    Parameters
+    ----------
+    view_menu : QMenu
+
+    Returns
+    -------
+    value : QtAds.CDockWidget
+    '''
+    label = QLabel()
+    label.setWordWrap(True)
+    label.setAlignment(Qt.AlignTop | Qt.AlignLeft)
+    label.setText('''\
+Label {} {} - Lorem ipsum dolor sit amet, consectetuer
+adipiscing elit.  Aenean commodo ligula eget dolor. Aenean massa. Cum
+sociis natoque penatibus et magnis dis parturient montes, nascetur
+ridiculus mus.  Donec quam felis, ultricies nec, pellentesque eu, pretium
+quis, sem.  Nulla consequat massa quis enim. Donec pede justo, fringilla
+vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut,
+imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis
+pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi.
+Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu,
+consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra
+quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet.
+    '''.format(_State.label_count, str(datetime.datetime.now())))
+    _State.label_count += 1
+
+    dock_widget = QtAds.CDockWidget("Label {}".format(_State.label_count))
+    dock_widget.setWidget(label)
+
+    view_menu.addAction(dock_widget.toggleViewAction())
+    return dock_widget
+
+
+def create_calendar_dock_widget(view_menu: QMenu) -> QtAds.CDockWidget:
+    '''
+    Create calendar dock widget
+
+    Parameters
+    ----------
+    view_menu : QMenu
+
+    Returns
+    -------
+    value : QtAds.CDockWidget
+    '''
+    widget = QCalendarWidget()
+
+    dock_widget = QtAds.CDockWidget("Calendar {}".format(_State.calendar_count))
+    _State.calendar_count += 1
+    dock_widget.setWidget(widget)
+    dock_widget.setToggleViewActionMode(QtAds.CDockWidget.ActionModeShow)
+    view_menu.addAction(dock_widget.toggleViewAction())
+    return dock_widget
+
+
+def create_file_system_tree_dock_widget(view_menu: QMenu) -> QtAds.CDockWidget:
+    '''
+    Create file system tree dock widget
+
+    Parameters
+    ----------
+    view_menu : QMenu
+
+    Returns
+    -------
+    value : QtAds.CDockWidget
+    '''
+    widget = QTreeView()
+    widget.setFrameShape(QFrame.NoFrame)
+
+    m = QFileSystemModel(widget)
+    m.setRootPath(QDir.currentPath())
+    widget.setModel(m)
+
+    dock_widget = QtAds.CDockWidget("Filesystem {}".format(_State.file_system_count))
+    _State.file_system_count += 1
+    dock_widget.setWidget(widget)
+    view_menu.addAction(dock_widget.toggleViewAction())
+    return dock_widget
+
+
+class MainWindow(QtWidgets.QMainWindow):
+    save_perspective_action: QAction
+    perspective_list_action: QWidgetAction
+    perspective_combo_box: QComboBox
+    dock_manager: QtAds.CDockManager
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.save_perspective_action = None
+        self.perspective_list_action = None
+        self.perspective_combo_box = None
+        self.dock_manager = None
+
+        self.setup_ui()
+
+        self.dock_manager = QtAds.CDockManager(self)
+        self.perspective_combo_box.activated[str].connect(self.dock_manager.openPerspective)
+        self.create_content()
+        self.resize(800, 600)
+        self.restore_state()
+        self.restore_perspectives()
+
+    def setup_ui(self):
+        self.setObjectName("MainWindow")
+        self.resize(400, 300)
+        self.setDockOptions(QtWidgets.QMainWindow.AllowTabbedDocks)
+        self.centralWidget = QtWidgets.QWidget(self)
+        self.centralWidget.setObjectName("centralWidget")
+        self.setCentralWidget(self.centralWidget)
+        self.status_bar = QtWidgets.QStatusBar(self)
+        self.status_bar.setObjectName("statusBar")
+        self.setStatusBar(self.status_bar)
+        self.menu_bar = QtWidgets.QMenuBar(self)
+        self.menu_bar.setGeometry(QRect(0, 0, 400, 21))
+        self.menu_bar.setObjectName("menuBar")
+        self.menu_file = QtWidgets.QMenu(self.menu_bar)
+        self.menu_file.setObjectName("menuFile")
+        self.menu_view = QtWidgets.QMenu(self.menu_bar)
+        self.menu_view.setObjectName("menuView")
+        self.menu_about = QtWidgets.QMenu(self.menu_bar)
+        self.menu_about.setObjectName("menuAbout")
+        self.setMenuBar(self.menu_bar)
+        self.tool_bar = QtWidgets.QToolBar(self)
+        self.tool_bar.setObjectName("toolBar")
+        self.addToolBar(Qt.TopToolBarArea, self.tool_bar)
+        self.action_exit = QtWidgets.QAction(self)
+        self.action_exit.setObjectName("actionExit")
+        self.action_save_state = QtWidgets.QAction(self)
+        self.action_save_state.setObjectName("actionSaveState")
+        self.action_save_state.triggered.connect(self.saveState)
+
+        self.action_restore_state = QtWidgets.QAction(self)
+        self.action_restore_state.setObjectName("actionRestoreState")
+        self.action_restore_state.triggered.connect(self.restore_state)
+
+        self.menu_file.addAction(self.action_exit)
+        self.menu_file.addAction(self.action_save_state)
+        self.menu_file.addAction(self.action_restore_state)
+        self.menu_bar.addAction(self.menu_file.menuAction())
+        self.menu_bar.addAction(self.menu_view.menuAction())
+        self.menu_bar.addAction(self.menu_about.menuAction())
+
+        self.setWindowTitle("MainWindow")
+        self.menu_file.setTitle("File")
+        self.menu_view.setTitle("View")
+        self.menu_about.setTitle("About")
+        self.tool_bar.setWindowTitle("toolBar")
+        self.action_exit.setText("Exit")
+        self.action_save_state.setText("Save State")
+        self.action_restore_state.setText("Restore State")
+        self.create_actions()
+
+    def create_actions(self):
+        '''
+        Creates the toolbar actions
+        '''
+        self.tool_bar.addAction(self.action_save_state)
+        self.action_save_state.setIcon(self.style().standardIcon(QStyle.SP_DialogSaveButton))
+        self.tool_bar.addAction(self.action_restore_state)
+        self.action_restore_state.setIcon(self.style().standardIcon(QStyle.SP_DialogOpenButton))
+        self.save_perspective_action = QAction("Save Perspective", self)
+        self.save_perspective_action.triggered.connect(self.save_perspective)
+
+        self.perspective_list_action = QWidgetAction(self)
+        self.perspective_combo_box = QComboBox(self)
+        self.perspective_combo_box.setSizeAdjustPolicy(QComboBox.AdjustToContents)
+        self.perspective_combo_box.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Preferred)
+        self.perspective_list_action.setDefaultWidget(self.perspective_combo_box)
+        self.tool_bar.addSeparator()
+        self.tool_bar.addAction(self.perspective_list_action)
+        self.tool_bar.addAction(self.save_perspective_action)
+
+    def create_content(self):
+        '''
+        Fill the dock manager with dock widgets
+        '''
+        # Test container docking
+        view_menu = self.menu_view
+        dock_widget = create_calendar_dock_widget(view_menu)
+        dock_widget.setIcon(self.style().standardIcon(QStyle.SP_DialogOpenButton))
+        dock_widget.setFeature(QtAds.CDockWidget.DockWidgetClosable, False)
+        self.dock_manager.addDockWidget(QtAds.LeftDockWidgetArea, dock_widget)
+        self.dock_manager.addDockWidget(QtAds.LeftDockWidgetArea, create_long_text_label_dock_widget(view_menu))
+        file_system_widget = create_file_system_tree_dock_widget(view_menu)
+        tool_bar = file_system_widget.createDefaultToolBar()
+        tool_bar.addAction(self.action_save_state)
+        tool_bar.addAction(self.action_restore_state)
+        self.dock_manager.addDockWidget(QtAds.BottomDockWidgetArea, file_system_widget)
+        file_system_widget = create_file_system_tree_dock_widget(view_menu)
+        tool_bar = file_system_widget.createDefaultToolBar()
+        tool_bar.addAction(self.action_save_state)
+        tool_bar.addAction(self.action_restore_state)
+        file_system_widget.setFeature(QtAds.CDockWidget.DockWidgetMovable, False)
+        top_dock_area = self.dock_manager.addDockWidget(QtAds.TopDockWidgetArea, file_system_widget)
+        dock_widget = create_calendar_dock_widget(view_menu)
+        dock_widget.setFeature(QtAds.CDockWidget.DockWidgetClosable, False)
+        dock_widget.setTabToolTip("Tab ToolTip\nHodie est dies magna")
+        self.dock_manager.addDockWidget(QtAds.CenterDockWidgetArea, dock_widget, top_dock_area)
+
+        # Test dock area docking
+        right_dock_area = self.dock_manager.addDockWidget(
+            QtAds.RightDockWidgetArea,
+            create_long_text_label_dock_widget(view_menu), top_dock_area)
+        self.dock_manager.addDockWidget(
+            QtAds.TopDockWidgetArea,
+            create_long_text_label_dock_widget(view_menu), right_dock_area)
+
+        bottom_dock_area = self.dock_manager.addDockWidget(
+            QtAds.BottomDockWidgetArea,
+            create_long_text_label_dock_widget(view_menu), right_dock_area)
+
+        self.dock_manager.addDockWidget(
+            QtAds.RightDockWidgetArea,
+            create_long_text_label_dock_widget(view_menu), right_dock_area)
+        self.dock_manager.addDockWidget(
+            QtAds.CenterDockWidgetArea,
+            create_long_text_label_dock_widget(view_menu), bottom_dock_area)
+
+    def save_state(self):
+        '''
+        Saves the dock manager state and the main window geometry
+        '''
+        settings = QSettings("Settings.ini", QSettings.IniFormat)
+        settings.setValue("mainWindow/Geometry", self.saveGeometry())
+        settings.setValue("mainWindow/State", self.saveState())
+        settings.setValue("mainWindow/DockingState", self.dock_manager.saveState())
+
+    def save_perspectives(self):
+        '''
+        Save the list of perspectives
+        '''
+        settings = QSettings("Settings.ini", QSettings.IniFormat)
+        self.dock_manager.savePerspectives(settings)
+
+    def restore_state(self):
+        '''
+        Restores the dock manager state
+        '''
+        settings = QSettings("Settings.ini", QSettings.IniFormat)
+        geom = settings.value("mainWindow/Geometry")
+        if geom is not None:
+            self.restoreGeometry(geom)
+
+        state = settings.value("mainWindow/State")
+        if state is not None:
+            self.restoreState(state)
+
+        state = settings.value("mainWindow/DockingState")
+        if state is not None:
+            self.dock_manager.restore_state(state)
+
+    def restore_perspectives(self):
+        '''
+        Restore the perspective listo of the dock manager
+        '''
+        settings = QSettings("Settings.ini", QSettings.IniFormat)
+        self.dock_manager.loadPerspectives(settings)
+        self.perspective_combo_box.clear()
+        self.perspective_combo_box.addItems(self.dock_manager.perspectiveNames())
+
+    def save_perspective(self):
+        perspective_name, ok = QInputDialog.getText(self, 'Save perspective', 'Enter unique name:')
+        if ok and perspective_name:
+            self.dock_manager.addPerspective(perspective_name)
+            _ = QSignalBlocker(self.perspective_combo_box)
+            self.perspective_combo_box.clear()
+            self.perspective_combo_box.addItems(self.dock_manager.perspectiveNames())
+            self.perspective_combo_box.setCurrentText(perspective_name)
+            self.save_perspectives()
+
+
+def main(app_):
+    main_window = MainWindow()
+    main_window.show()
+    state = main_window.dock_manager.saveState()
+    # print('This is what the saved state looks like in XML:')
+    # print(str(state, 'utf-8'))
+    # print()
+    # main_window.dock_manager.restore_state(state)
+    return main_window
+
+
+if __name__ == '__main__':
+    # logging.basicConfig(level='DEBUG')
+    QCoreApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)
+    QGuiApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
+    app = QtWidgets.QApplication([])
+    window = main(app)
+    window.show()
+    app.exec_()

demo/CMakeLists.txt

@@ -0,0 +1,47 @@
+cmake_minimum_required(VERSION 3.3)
+set (CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTORCC ON)
+project(ads_demo VERSION "1.0") 
+set(REQUIRED_QT_VERSION 5.5.0)
+find_package(Qt5Core ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Gui ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Widgets ${REQUIRED_QT_VERSION} REQUIRED)
+set(ads_demo_LIBS ${ads_demo_LIBS} ${Qt5Core_LIBRARIES})
+set(ads_demo_INCLUDE ${ads_demo_INCLUDE} ${Qt5Core_INCLUDE_DIRS})
+set(ads_demo_COMPILE_DEFINE ${ads_demo_COMPILE_DEFINE} ${Qt5Core_COMPILE_DEFINITIONS} )
+set(ads_demo_LIBS ${ads_demo_LIBS} ${Qt5Gui_LIBRARIES})
+set(ads_demo_INCLUDE ${ads_demo_INCLUDE} ${Qt5Gui_INCLUDE_DIRS})
+set(ads_demo_COMPILE_DEFINE ${ads_demo_COMPILE_DEFINE} ${Qt5Gui_COMPILE_DEFINITIONS})
+set(ads_demo_LIBS ${ads_demo_LIBS} ${Qt5Widgets_LIBRARIES})
+set(ads_demo_INCLUDE ${ads_demo_INCLUDE} ${Qt5Widgets_INCLUDE_DIRS})
+set(ads_demo_COMPILE_DEFINE ${ads_demo_COMPILE_DEFINE} ${Qt5Widgets_COMPILE_DEFINITIONS})
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(ads_demo_SRCS
+    main.cpp
+    MainWindow.cpp
+    mainwindow.ui
+)
+add_executable(AdvancedDockingSystemDemo WIN32 ${ads_demo_SRCS})
+if(BUILD_STATIC)
+    set(ads_demo_DEFINE ${ads_demo_DEFINE} ADS_STATIC)
+endif()
+add_dependencies(AdvancedDockingSystemDemo qtadvanceddocking)
+target_include_directories(AdvancedDockingSystemDemo PUBLIC 
+    $<BUILD_INTERFACE:${ads_demo_INCLUDE}>
+    $<INSTALL_INTERFACE:include>
+    )
+target_include_directories(AdvancedDockingSystemDemo PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/../src"  ${ads_demo_INCLUDE})
+target_link_libraries(AdvancedDockingSystemDemo PRIVATE qtadvanceddocking ${ads_demo_LIBS})
+target_compile_definitions(AdvancedDockingSystemDemo PRIVATE ${ads_demo_DEFINE})
+set_target_properties(AdvancedDockingSystemDemo PROPERTIES 
+    VERSION "1.0"
+    SOVERSION 1
+    EXPORT_NAME "Qt Advanced Docking System Demo"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/bin"
+)

demo/MainWindow.cpp

@@ -88,6 +88,32 @@ static ads::CDockWidget* createLongTextLabelDockWidget(QMenu* ViewMenu)
 }
 
 
+/**
+ * Function returns a features string with closable (c), movable (m) and floatable (f)
+ * features. i.e. The following string is for a not closable but movable and floatable
+ * widget: c- m+ f+
+ */
+static QString featuresString(ads::CDockWidget* DockWidget)
+{
+	auto f = DockWidget->features();
+	return QString("c%1 m%2 f%3")
+		.arg(f.testFlag(ads::CDockWidget::DockWidgetClosable) ? "+" : "-")
+		.arg(f.testFlag(ads::CDockWidget::DockWidgetMovable) ? "+" : "-")
+		.arg(f.testFlag(ads::CDockWidget::DockWidgetFloatable) ? "+" : "-");
+}
+
+
+/**
+ * Appends the string returned by featuresString() to the window title of
+ * the given DockWidget
+ */
+static void appendFeaturStringToWindowTitle(ads::CDockWidget* DockWidget)
+{
+	DockWidget->setWindowTitle(DockWidget->windowTitle()
+		+  QString(" (%1)").arg(featuresString(DockWidget)));
+}
+
+
 //============================================================================
 static ads::CDockWidget* createCalendarDockWidget(QMenu* ViewMenu)
 {
@@ -110,7 +136,8 @@ static ads::CDockWidget* createFileSystemTreeDockWidget(QMenu* ViewMenu)
 	QFileSystemModel* m = new QFileSystemModel(w);
 	m->setRootPath(QDir::currentPath());
 	w->setModel(m);
-	ads::CDockWidget* DockWidget = new ads::CDockWidget(QString("Filesystem %1").arg(FileSystemCount++));
+	ads::CDockWidget* DockWidget = new ads::CDockWidget(QString("Filesystem %1")
+		.arg(FileSystemCount++));
 	DockWidget->setWidget(w);
 	ViewMenu->addAction(DockWidget->toggleViewAction());
     return DockWidget;
@@ -127,7 +154,7 @@ struct MainWindowPrivate
 	Ui::MainWindow ui;
 	QAction* SavePerspectiveAction = nullptr;
 	QWidgetAction* PerspectiveListAction = nullptr;
-	QComboBox* PerspectiveComboBox = nullptr;;
+	QComboBox* PerspectiveComboBox = nullptr;
 	ads::CDockManager* DockManager = nullptr;
 
 	MainWindowPrivate(CMainWindow* _public) : _this(_public) {}
@@ -174,13 +201,23 @@ void MainWindowPrivate::createContent()
 	DockWidget->setFeature(ads::CDockWidget::DockWidgetClosable, false);
 	DockManager->addDockWidget(ads::LeftDockWidgetArea, DockWidget);
 	DockManager->addDockWidget(ads::LeftDockWidgetArea, createLongTextLabelDockWidget(ViewMenu));
-	DockManager->addDockWidget(ads::BottomDockWidgetArea, createFileSystemTreeDockWidget(ViewMenu));
-
 	auto FileSystemWidget = createFileSystemTreeDockWidget(ViewMenu);
+	auto ToolBar = FileSystemWidget->createDefaultToolBar();
+	ToolBar->addAction(ui.actionSaveState);
+	ToolBar->addAction(ui.actionRestoreState);
+	DockManager->addDockWidget(ads::BottomDockWidgetArea, FileSystemWidget);
+
+	FileSystemWidget = createFileSystemTreeDockWidget(ViewMenu);
+	ToolBar = FileSystemWidget->createDefaultToolBar();
+	ToolBar->addAction(ui.actionSaveState);
+	ToolBar->addAction(ui.actionRestoreState);
 	FileSystemWidget->setFeature(ads::CDockWidget::DockWidgetMovable, false);
+	FileSystemWidget->setFeature(ads::CDockWidget::DockWidgetFloatable, false);
+	appendFeaturStringToWindowTitle(FileSystemWidget);
 	auto TopDockArea = DockManager->addDockWidget(ads::TopDockWidgetArea, FileSystemWidget);
 	DockWidget = createCalendarDockWidget(ViewMenu);
 	DockWidget->setFeature(ads::CDockWidget::DockWidgetClosable, false);
+	DockWidget->setTabToolTip(QString("Tab ToolTip\nHodie est dies magna"));
 	DockManager->addDockWidget(ads::CenterDockWidgetArea, DockWidget, TopDockArea);
 
 	// Test dock area docking
@@ -189,6 +226,13 @@ void MainWindowPrivate::createContent()
 	auto BottomDockArea = DockManager->addDockWidget(ads::BottomDockWidgetArea, createLongTextLabelDockWidget(ViewMenu), RighDockArea);
 	DockManager->addDockWidget(ads::RightDockWidgetArea, createLongTextLabelDockWidget(ViewMenu), RighDockArea);
 	DockManager->addDockWidget(ads::CenterDockWidgetArea, createLongTextLabelDockWidget(ViewMenu), BottomDockArea);
+    //DockManager->addDockWidget(ads::CenterDockWidgetArea, createLongTextLabelDockWidget(ViewMenu), BottomDockArea);
+    //DockManager->addDockWidget(ads::CenterDockWidgetArea, createLongTextLabelDockWidget(ViewMenu), BottomDockArea);
+
+	for (auto DockWidget : DockManager->dockWidgetsMap())
+	{
+		_this->connect(DockWidget, SIGNAL(viewToggled(bool)), SLOT(onViewToggled(bool)));
+	}
 }
 
 
@@ -258,17 +302,31 @@ CMainWindow::CMainWindow(QWidget *parent) :
 	QMainWindow(parent),
 	d(new MainWindowPrivate(this))
 {
+	using namespace ads;
 	d->ui.setupUi(this);
 	d->createActions();
 
+	// uncomment the following line if the tab close button should be
+	// a QToolButton instead of a QPushButton
+	// CDockManager::setConfigFlags(CDockManager::configFlags() | CDockManager::TabCloseButtonIsToolButton);
+
+	// uncomment the following line if you wand a fixed tab width that does
+	// not change if the visibility of the close button changes
+	// CDockManager::setConfigFlag(CDockManager::RetainTabSizeWhenCloseButtonHidden, true);
+
 	// Now create the dock manager and its content
-	d->DockManager = new ads::CDockManager(this);
+	d->DockManager = new CDockManager(this);
+
+	// Uncomment the following line to have the old style where the dock
+	// area close button closes the active tab
+	// CDockManager::setConfigFlags({CDockManager::DockAreaHasCloseButton
+	//	| CDockManager::DockAreaCloseButtonClosesTab});
 	connect(d->PerspectiveComboBox, SIGNAL(activated(const QString&)),
 		d->DockManager, SLOT(openPerspective(const QString&)));
 
 	d->createContent();
 	// Default window geometry
-	resize(800, 600);
+    resize(1280, 720);
 
 	d->restoreState();
 	d->restorePerspectives();
@@ -309,7 +367,6 @@ void CMainWindow::on_actionRestoreState_triggered(bool)
 //============================================================================
 void CMainWindow::savePerspective()
 {
-	std::cout << "savePerspective" << std::endl;
 	QString PerspectiveName = QInputDialog::getText(this, "Save Perspective", "Enter unique name:");
 	if (PerspectiveName.isEmpty())
 	{
@@ -325,3 +382,16 @@ void CMainWindow::savePerspective()
 	d->savePerspectives();
 }
 
+
+//============================================================================
+void CMainWindow::onViewToggled(bool Open)
+{
+	auto DockWidget = qobject_cast<ads::CDockWidget*>(sender());
+	if (!DockWidget)
+	{
+		return;
+	}
+
+	qDebug() << DockWidget->objectName() << " viewToggled(" << Open << ")";
+}
+

demo/MainWindow.h

@@ -58,6 +58,7 @@ private slots:
 	void on_actionSaveState_triggered(bool);
 	void on_actionRestoreState_triggered(bool);
 	void savePerspective();
+	void onViewToggled(bool Open);
 };
 
 #endif // MAINWINDOW_H

demo/demo.pro

@@ -1,29 +1,44 @@
-ADS_ROOT = $${PWD}/..
 ADS_OUT_ROOT = $${OUT_PWD}/..
 
 TARGET = AdvancedDockingSystemDemo
 DESTDIR = $${ADS_OUT_ROOT}/lib
 QT += core gui widgets
-CONFIG *= c++14
+CONFIG += c++14
+CONFIG += debug_and_release
+DEFINES += QT_DEPRECATED_WARNINGS
 
+adsBuildStatic {
+    DEFINES += ADS_STATIC
+}
 
 SOURCES += \
 	main.cpp \
 	MainWindow.cpp
 
-
 HEADERS += \
 	MainWindow.h
 
 FORMS += \
 	mainwindow.ui
 
+
 LIBS += -L$${ADS_OUT_ROOT}/lib
 
 # Dependency: AdvancedDockingSystem (shared)
-win32:CONFIG(release, debug|release): LIBS += -lAdvancedDockingSystem
-else:win32:CONFIG(debug, debug|release): LIBS += -lAdvancedDockingSystemd
-else:unix: LIBS += -lAdvancedDockingSystem
+CONFIG(debug, debug|release){
+    win32 {
+        LIBS += -lqtadvanceddockingd
+    }
+    else:mac {
+        LIBS += -lqtadvanceddocking_debug
+    }
+    else {
+        LIBS += -lqtadvanceddocking
+    }
+}
+else{
+    LIBS += -lqtadvanceddocking
+}
 
 INCLUDEPATH += ../src
 DEPENDPATH += ../src

demo/main.cpp

@@ -35,6 +35,10 @@ void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QS
 
 int main(int argc, char *argv[])
 {
+	QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#if QT_VERSION >= 0x050600
+    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
 	std::shared_ptr<int> b;
 	QApplication a(argc, argv);
 	a.setQuitOnLastWindowClosed(true);

example/CMakeLists.txt

@@ -0,0 +1,46 @@
+cmake_minimum_required(VERSION 3.3)
+set (CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTOUIC ON)
+project(ads_example VERSION "1.0") 
+set(REQUIRED_QT_VERSION 5.5.0)
+find_package(Qt5Core ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Gui ${REQUIRED_QT_VERSION} REQUIRED)
+find_package(Qt5Widgets ${REQUIRED_QT_VERSION} REQUIRED)
+set(ads_example_LIBS ${ads_example_LIBS} ${Qt5Core_LIBRARIES})
+set(ads_example_INCLUDE ${ads_example_INCLUDE} ${Qt5Core_INCLUDE_DIRS})
+set(ads_example_COMPILE_DEFINE ${ads_example_COMPILE_DEFINE} ${Qt5Core_COMPILE_DEFINITIONS} )
+set(ads_example_LIBS ${ads_example_LIBS} ${Qt5Gui_LIBRARIES})
+set(ads_example_INCLUDE ${ads_example_INCLUDE} ${Qt5Gui_INCLUDE_DIRS})
+set(ads_example_COMPILE_DEFINE ${ads_example_COMPILE_DEFINE} ${Qt5Gui_COMPILE_DEFINITIONS})
+set(ads_example_LIBS ${ads_example_LIBS} ${Qt5Widgets_LIBRARIES})
+set(ads_example_INCLUDE ${ads_example_INCLUDE} ${Qt5Widgets_INCLUDE_DIRS})
+set(ads_example_COMPILE_DEFINE ${ads_example_COMPILE_DEFINE} ${Qt5Widgets_COMPILE_DEFINITIONS})
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(ads_example_SRCS
+    main.cpp
+    MainWindow.cpp
+    MainWindow.ui
+)
+add_executable(Example1 WIN32 ${ads_example_SRCS})
+if(BUILD_STATIC)
+    set(ads_example_DEFINE ${ads_example_DEFINE} ADS_STATIC)
+endif()
+add_dependencies(Example1 qtadvanceddocking)
+target_include_directories(Example1 PUBLIC 
+    $<BUILD_INTERFACE:${ads_example_INCLUDE}>
+    $<INSTALL_INTERFACE:include>
+    )
+target_include_directories(Example1 PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/../src"  ${ads_example_INCLUDE})
+target_link_libraries(Example1 PRIVATE qtadvanceddocking ${ads_example_LIBS})
+target_compile_definitions(Example1 PRIVATE ${ads_example_DEFINE})
+set_target_properties(Example1 PROPERTIES 
+    VERSION "1.0"
+    SOVERSION 1
+    EXPORT_NAME "Qt Advanced Docking System Example"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${ads_PlatformDir}/bin"
+)

example/MainWindow.cpp

@@ -0,0 +1,39 @@
+#include "MainWindow.h"
+#include "ui_MainWindow.h"
+
+#include <QLabel>
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+
+    // Create the dock manager. Because the parent parameter is a QMainWindow
+    // the dock manager registers itself as the central widget.
+	m_DockManager = new ads::CDockManager(this);
+
+	// Create example content label - this can be any application specific
+	// widget
+	QLabel* l = new QLabel();
+	l->setWordWrap(true);
+	l->setAlignment(Qt::AlignTop | Qt::AlignLeft);
+	l->setText("Lorem ipsum dolor sit amet, consectetuer adipiscing elit. ");
+
+	// Create a dock widget with the title Label 1 and set the created label
+	// as the dock widget content
+	ads::CDockWidget* DockWidget = new ads::CDockWidget("Label 1");
+	DockWidget->setWidget(l);
+
+	// Add the toggleViewAction of the dock widget to the menu to give
+	// the user the possibility to show the dock widget if it has been closed
+	ui->menuView->addAction(DockWidget->toggleViewAction());
+
+	// Add the dock widget to the top dock widget area
+	m_DockManager->addDockWidget(ads::TopDockWidgetArea, DockWidget);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}

example/MainWindow.h

@@ -0,0 +1,24 @@
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include "DockManager.h"
+
+namespace Ui {
+class MainWindow;
+}
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
+
+private:
+    Ui::MainWindow *ui;
+    ads::CDockManager* m_DockManager;
+};
+
+#endif // MAINWINDOW_H

example/MainWindow.ui

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralWidget"/>
+  <widget class="QMenuBar" name="menuBar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>400</width>
+     <height>21</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuView">
+    <property name="title">
+     <string>View</string>
+    </property>
+   </widget>
+   <addaction name="menuView"/>
+  </widget>
+  <widget class="QStatusBar" name="statusBar"/>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

example/example.pro

@@ -0,0 +1,47 @@
+ADS_OUT_ROOT = $${OUT_PWD}/..
+
+QT += core gui widgets
+
+TARGET = Example1
+DESTDIR = $${ADS_OUT_ROOT}/lib
+TEMPLATE = app
+CONFIG += c++14
+CONFIG += debug_and_release
+adsBuildStatic {
+    DEFINES += ADS_STATIC
+}
+
+DEFINES += QT_DEPRECATED_WARNINGS
+
+SOURCES += \
+        main.cpp \
+        MainWindow.cpp
+
+HEADERS += \
+        MainWindow.h
+
+FORMS += \
+        MainWindow.ui
+        
+
+LIBS += -L$${ADS_OUT_ROOT}/lib
+
+# Dependency: AdvancedDockingSystem (shared)
+CONFIG(debug, debug|release){
+    win32 {
+        LIBS += -lqtadvanceddockingd
+    }
+    else:mac {
+        LIBS += -lqtadvanceddocking_debug
+    }
+    else {
+        LIBS += -lqtadvanceddocking
+    }
+}
+else{
+    LIBS += -lqtadvanceddocking
+}
+
+INCLUDEPATH += ../src
+DEPENDPATH += ../src    
+

example/main.cpp

@@ -0,0 +1,11 @@
+#include "MainWindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}

recipes/meta.yaml

@@ -0,0 +1,41 @@
+{% set data = load_setup_py_data() %}
+
+package:
+    name: pyqtads
+    version: {{ data.get('version') }}
+
+source:
+    path: ../
+
+build:
+    number: 0
+    script: python setup.py install --single-version-externally-managed --record=record.txt --conda-recipe
+
+requirements:
+    build:
+        - python
+        - setuptools
+        - pyqt>=5.9
+        - sip>=4.19
+    run:
+        - python
+        - pyqt>=5.9
+        - sip>=4.19
+        - pywin32  [win]
+
+test:
+    imports:
+        - PyQtAds
+
+about:
+    home: {{ data.get('url') }}
+    license: {{ data.get('license') }}
+    license_family: LGPL
+    license_file: 'LICENSE.md'
+    summary: {{ data.get('description') }}
+    description: {{ data.get('description') }}
+    doc_url: ''
+    dev_url: {{ data.get('url') }}
+
+extra:
+    recipe-maintainers: 'nicolas.elie@cnrs.fr'

setup.py

@@ -0,0 +1,342 @@
+import os
+import sys
+import shlex
+import subprocess
+import glob
+
+from setuptools import setup, find_packages
+from setuptools.extension import Extension
+from distutils import sysconfig, dir_util, spawn, log
+from distutils.dep_util import newer
+import sipdistutils
+import sipconfig
+from PyQt5.QtCore import PYQT_CONFIGURATION
+from PyQt5.pyrcc_main import processResourceFile
+
+MAJOR = 2
+MINOR = 5
+MICRO = 1
+ISRELEASED = True
+VERSION = '%d.%d.%d' % (MAJOR, MINOR, MICRO)
+MODULE_NAME = "ads"
+SRC_PATH = "PyQtAds"
+    
+REQUIRE_PYQT = True
+if "--conda-recipe" in sys.argv:
+    REQUIRE_PYQT = False
+    sys.argv.remove("--conda-recipe")
+
+
+class HostPythonConfiguration(object):
+    def __init__(self):
+        self.platform = sys.platform
+        self.version = sys.hexversion>>8
+
+        self.inc_dir = sysconfig.get_python_inc()
+        self.venv_inc_dir = sysconfig.get_python_inc(prefix=sys.prefix)
+        self.module_dir = sysconfig.get_python_lib(plat_specific=1)
+
+        if sys.platform == 'win32':
+            self.data_dir = sys.prefix
+            self.lib_dir = sys.prefix +'\\libs'
+        else:
+            self.data_dir = sys.prefix + '/share'
+            self.lib_dir = sys.prefix + '/lib'
+            
+
+class TargetQtConfiguration(object):
+    def __init__(self, qmake):
+        pipe = os.popen(' '.join([qmake, '-query']))
+
+        for l in pipe:
+            l = l.strip()
+
+            tokens = l.split(':', 1)
+            if isinstance(tokens, list):
+                if len(tokens) != 2:
+                    error("Unexpected output from qmake: '%s'\n" % l)
+
+                name, value = tokens
+            else:
+                name = tokens
+                value = None
+
+            name = name.replace('/', '_')
+            setattr(self, name, value)
+
+        pipe.close()
+        
+
+class build_ext(sipdistutils.build_ext):
+    
+    description = "Builds the " + MODULE_NAME + " module."
+    
+    user_options = sipdistutils.build_ext.user_options + [
+        ('qmake-bin=', None, "Path to qmake binary"),
+        ('sip-bin=', None, "Path to sip binary"),
+        ('qt-include-dir=', None, "Path to Qt headers"),
+        ('pyqt-sip-dir=', None, "Path to PyQt's SIP files"),
+        ('pyqt-sip-flags=', None, "SIP flags used to generate PyQt bindings"),
+        ('sip-dir=', None, "Path to module's SIP files"),
+        ('inc-dir=', None, "Path to module's include files")
+    ]
+    
+    def initialize_options (self):
+        super().initialize_options()
+        self.qmake_bin = 'qmake'
+        self.sip_bin = None
+        self.qt_include_dir = None
+        self.qt_libinfix = ''
+        self.pyqt_sip_dir = None
+        self.pyqt_sip_flags = None
+        self.sip_files_dir = None
+        self.sip_inc_dir = None
+        self.inc_dir = None
+        self.pyconfig = HostPythonConfiguration()
+        self.qtconfig = TargetQtConfiguration(self.qmake_bin)
+        self.config = sipconfig.Configuration()    
+        self.config.default_mod_dir = ("/usr/local/lib/python%i.%i/dist-packages" %
+                                      (sys.version_info.major, sys.version_info.minor))
+        
+    def finalize_options (self):
+        super().finalize_options()
+
+        if not self.qt_include_dir:
+            self.qt_include_dir = self.qtconfig.QT_INSTALL_HEADERS
+            
+        if not self.qt_libinfix:
+            try:
+                with open(os.path.join(self.qtconfig.QT_INSTALL_PREFIX, 'mkspecs', 'qconfig.pri'), 'r') as f:
+                    for line in f.readlines():
+                        if line.startswith('QT_LIBINFIX'):
+                            self.qt_libinfix = line.split('=')[1].strip('\n').strip()
+            except (FileNotFoundError, IndexError):
+                pass
+
+        if not self.pyqt_sip_dir:
+            self.pyqt_sip_dir = os.path.join(self.pyconfig.data_dir, 'sip', 'PyQt5')
+            
+        if not self.pyqt_sip_flags:
+            self.pyqt_sip_flags = PYQT_CONFIGURATION.get('sip_flags', '')
+            
+        if not self.sip_files_dir:
+            self.sip_files_dir = os.path.abspath(os.path.join(".", "sip"))
+            
+        if not self.sip_inc_dir:
+            self.sip_inc_dir = self.pyconfig.venv_inc_dir
+            
+        if not self.inc_dir:
+            self.inc_dir = os.path.abspath(os.path.join(".", "src"))
+
+        if not self.qt_include_dir:
+            raise SystemExit('Could not find Qt5 headers. '
+                             'Please specify via --qt-include-dir=')
+
+        if not self.pyqt_sip_dir:
+            raise SystemExit('Could not find PyQt SIP files. '
+                             'Please specify containing directory via '
+                             '--pyqt-sip-dir=')
+
+        if not self.pyqt_sip_flags:
+            raise SystemExit('Could not find PyQt SIP flags. '
+                             'Please specify via --pyqt-sip-flags=')
+        
+    def _find_sip(self):
+        """override _find_sip to allow for manually speficied sip path."""
+        return self.sip_bin or super()._find_sip()
+        
+    def _sip_compile(self, sip_bin, source, sbf): 
+        cmd = [sip_bin]
+        if hasattr(self, 'sip_opts'):
+            cmd += self.sip_opts
+        if hasattr(self, '_sip_sipfiles_dir'):
+            cmd += ['-I', self._sip_sipfiles_dir()]
+        cmd += [
+            "-I", self.sip_files_dir,
+            "-I", self.pyqt_sip_dir,
+            "-I", self.sip_inc_dir,
+            "-I", self.inc_dir,
+            "-c", self._sip_output_dir(),
+            "-b", sbf,
+            "-w", "-o"]
+        
+        cmd += shlex.split(self.pyqt_sip_flags)  # use same SIP flags as for PyQt5
+        cmd.append(source)
+        self.spawn(cmd)
+        
+    def swig_sources (self, sources, extension=None):
+        if not self.extensions:
+            return
+
+        # Add the local include directory to the include path
+        if extension is not None:
+            extension.extra_compile_args += ['-D', 'QT_CORE_LIB',
+                                             '-D', 'QT_GUI_LIB',
+                                             '-D', 'QT_WIDGETS_LIB',
+                                             '-D', 'ADS_SHARED_EXPORT']
+            extension.include_dirs += [self.qt_include_dir, self.inc_dir,
+                            os.path.join(self.qt_include_dir, 'QtCore'),
+                            os.path.join(self.qt_include_dir, 'QtGui'),
+                            os.path.join(self.qt_include_dir, 'QtWidgets')]
+            extension.libraries += ['Qt5Core' + self.qt_libinfix,
+                                    'Qt5Gui' + self.qt_libinfix,
+                                    'Qt5Widgets' + self.qt_libinfix]
+            
+            if sys.platform == 'win32':
+                extension.library_dirs += [self.qtconfig.QT_INSTALL_LIBS,
+                                       self.inc_dir, self._sip_output_dir()]
+            elif sys.platform == 'darwin':
+                extension.extra_compile_args += ['-F' + self.qtconfig.QT_INSTALL_LIBS,
+                    '-std=c++11', '-stdlib=libc++', '-mmacosx-version-min=10.9']
+                extension.extra_link_args += ['-F' + self.qtconfig.QT_INSTALL_LIBS,
+                    '-mmacosx-version-min=10.9']
+            elif sys.platform == 'linux':
+                extension.extra_compile_args += ['-std=c++11']
+
+        return super().swig_sources(sources, extension)
+        
+    def build_extension(self, ext):
+        cppsources = [source for source in ext.sources if source.endswith(".cpp")]
+        
+        dir_util.mkpath(self.build_temp, dry_run=self.dry_run)
+
+        # Run moc on all header files.
+        for source in cppsources:
+            header = source.replace(".cpp", ".h")
+            if os.path.exists(header):
+                moc_file = "moc_" + os.path.basename(header).replace(".h", ".cpp")
+                out_file = os.path.join(self.build_temp, moc_file)
+                
+                if newer(header, out_file) or self.force:
+                    call_arg = ["moc", "-o", out_file, header]
+                    spawn.spawn(call_arg, dry_run=self.dry_run)
+                    
+                if os.path.getsize(out_file) > 0:
+                    ext.sources.append(out_file)
+
+        # Add the temp build directory to include path, for compiler to find
+        # the created .moc files
+        ext.include_dirs += [self._sip_output_dir()]
+        
+        sipdistutils.build_ext.build_extension(self, ext)
+
+        
+def git_version():
+    '''Return the git revision as a string'''
+    
+    def _minimal_ext_cmd(cmd):
+        # construct minimal environment
+        env = {}
+        for k in ['SYSTEMROOT', 'PATH', 'HOME']:
+            v = os.environ.get(k)
+            if v is not None:
+                env[k] = v
+        # LANGUAGE is used on win32
+        env['LANGUAGE'] = 'C'
+        env['LANG'] = 'C'
+        env['LC_ALL'] = 'C'
+        out = subprocess.Popen(cmd, stdout=subprocess.PIPE, env=env).communicate()[0]
+        return out
+
+    try:
+        out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
+        GIT_REVISION = out.strip().decode('ascii')
+    except OSError:
+        GIT_REVISION = "Unknown"
+
+    return GIT_REVISION
+  
+
+def get_version_info():
+    # Adding the git rev number needs to be done inside write_version_py(),
+    # otherwise the import of numpy.version messes up the build under Python 3.
+    FULLVERSION = VERSION
+    if os.path.exists('.git'):
+        GIT_REVISION = git_version()
+    elif os.path.exists(os.path.join(SRC_PATH, 'version.py')):
+        # must be a source distribution, use existing version file
+        try:
+            from PyQtAds.version import git_revision as GIT_REVISION
+        except ImportError:
+            raise ImportError("Unable to import git_revision. Try removing " \
+                              "%(module)/version.py and the build directory " \
+                              "before building." % {'module': SRC_PATH})
+    else:
+        GIT_REVISION = "Unknown"
+
+    if not ISRELEASED:
+        FULLVERSION += '.dev0+' + GIT_REVISION[:7]
+
+    return FULLVERSION, GIT_REVISION
+    
+
+def write_version_py(filename=os.path.join(SRC_PATH, '_version.py')):
+    cnt = ("# THIS FILE IS GENERATED FROM %(module)s SETUP.PY\n\n"
+           "short_version = '%(version)s'\n"
+           "version = '%(version)s'\n"
+           "full_version = '%(full_version)s'\n"
+           "git_revision = '%(git_revision)s'\n"
+           "release = %(isrelease)s\n"
+           "if not release:\n"
+           "    version = full_version\n")
+    FULLVERSION, GIT_REVISION = get_version_info()
+
+    with open(filename, 'w') as f:
+        f.write(cnt % {'module': SRC_PATH,
+                       'version': VERSION,
+                       'full_version': FULLVERSION,
+                       'git_revision': GIT_REVISION,
+                       'isrelease': str(ISRELEASED)})
+  
+setup_requires = ["PyQt5"] if REQUIRE_PYQT else []
+cpp_sources = glob.glob(os.path.join('src', '*.cpp'))
+sip_sources = [os.path.join('sip', MODULE_NAME + '.sip')]
+if sys.platform == 'linux':
+    cpp_sources += glob.glob(os.path.join('src', 'linux', '*.cpp'))
+ext_modules = [Extension('PyQtAds.QtAds.ads', cpp_sources + sip_sources)]
+
+install_requires = ["PyQt5"]
+if sys.platform == 'win32':
+    install_requires.append("pywin32")
+    
+
+write_version_py(os.path.join(SRC_PATH, '_version.py'))
+processResourceFile([os.path.join('src', 'ads.qrc')],
+                    os.path.join(SRC_PATH, 'rc.py'), False)
+with open('README.md', 'r') as f:
+    LONG_DESCRIPTION = f.read()
+    
+setup(
+    name = SRC_PATH,
+    author = "Nicolas Elie",
+    author_email = "nicolas.elie@cnrs.fr",
+    url = "https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System",
+    version = get_version_info()[0],
+    description = "Advanced Docking System for Qt",
+    long_description = LONG_DESCRIPTION,
+    keywords = ["qt"],
+    license = "LGPLv2+",
+    classifiers = ["Development Status :: 4 - Beta",
+                   "Intended Audience :: Developers",
+                   "License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)",
+                   "Operating System :: OS Independent",
+                   "Topic :: Software Development :: Libraries :: Python Modules",
+                   "Environment :: Win32 (MS Windows)",
+                   "Environment :: MacOS X",
+                   "Environment :: X11 Applications :: Qt",
+                   "Programming Language :: Python :: 3",
+                   "Programming Language :: Python :: 3.2",
+                   "Programming Language :: Python :: 3.3",
+                   "Programming Language :: Python :: 3.4",
+                   "Programming Language :: Python :: 3.5",
+                   "Programming Language :: Python :: 3.6",
+                   "Programming Language :: Python :: 3.7"],
+    ext_modules = ext_modules,
+    cmdclass = {
+        'build_ext': build_ext,
+    },
+    packages = find_packages(),
+    setup_requires = setup_requires,
+    install_requires = install_requires,
+    zip_safe=False
+)

simple.py

@@ -0,0 +1,82 @@
+import logging
+
+from PyQt5 import QtWidgets, QtCore
+from PyQt5.QtCore import Qt
+from PyQtAds import QtAds
+
+
+class MainWindow(QtWidgets.QMainWindow):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setup_ui()
+        self.dock_manager = QtAds.CDockManager(self)
+
+        self.dock_widgets = []
+
+        for label_text, area in (
+                ('1 Top', QtAds.TopDockWidgetArea),
+                ('2 Bottom', QtAds.BottomDockWidgetArea),
+                ('3 Left', QtAds.LeftDockWidgetArea),
+                ('4 Right', QtAds.RightDockWidgetArea),
+        ):
+            # Create example content label - this can be any application specific
+            # widget
+            label = QtWidgets.QLabel()
+            label.setWordWrap(True)
+            label.setAlignment(Qt.AlignTop | Qt.AlignLeft)
+            label.setText(f"{label_text}: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. ")
+
+            # Create a dock widget with the title Label 1 and set the created label
+            # as the dock widget content
+            dock_widget = QtAds.CDockWidget(label_text)
+            dock_widget.setWidget(label)
+            self.dock_widgets.append(dock_widget)
+
+            # Add the toggleViewAction of the dock widget to the menu to give
+            # the user the possibility to show the dock widget if it has been closed
+            self.menu_view.addAction(dock_widget.toggleViewAction())
+
+            # Add the dock widget to the top dock widget area
+            self.dock_manager.addDockWidget(area, dock_widget)
+
+    def setup_ui(self):
+        self.setWindowTitle("MainWindow")
+        self.setObjectName("MainWindow")
+        self.resize(400, 300)
+        self.central_widget = QtWidgets.QWidget(self)
+        self.central_widget.setObjectName("central_widget")
+        self.setCentralWidget(self.central_widget)
+
+        self.menu_bar = QtWidgets.QMenuBar(self)
+        self.menu_bar.setGeometry(QtCore.QRect(0, 0, 400, 21))
+        self.menu_bar.setObjectName("menuBar")
+
+        self.menu_view = QtWidgets.QMenu(self.menu_bar)
+        self.menu_view.setObjectName("menu_view")
+        self.menu_view.setTitle("View")
+        self.setMenuBar(self.menu_bar)
+
+        self.status_bar = QtWidgets.QStatusBar(self)
+        self.status_bar.setObjectName("statusBar")
+        self.setStatusBar(self.status_bar)
+        self.menu_bar.addAction(self.menu_view.menuAction())
+
+
+def main(app):
+    main = MainWindow()
+    main.show()
+    state = main.dock_manager.saveState()
+    print('This is what the saved state looks like in XML:')
+    print(state)
+    print()
+    main.dock_manager.restoreState(state)
+    return main
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level='DEBUG')
+    app = QtWidgets.QApplication([])
+    window = main(app)
+    window.show()
+    print('shown')
+    app.exec_()

sip/DockAreaTabBar.sip

@@ -0,0 +1,56 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockAreaTabBar : QScrollArea
+{
+    %TypeHeaderCode
+    #include <DockAreaTabBar.h>
+    %End
+    
+protected:
+	virtual void wheelEvent(QWheelEvent* Event);
+	virtual void mousePressEvent(QMouseEvent* ev);
+	virtual void mouseReleaseEvent(QMouseEvent* ev);
+	virtual void mouseMoveEvent(QMouseEvent* ev);
+	virtual void mouseDoubleClickEvent(QMouseEvent *event);
+	void startFloating(const QPoint& Offset);
+	ads::CFloatingDockContainer* makeAreaFloating(const QPoint& Offset,
+		ads::eDragState DragState);
+    
+public:
+	CDockAreaTabBar(ads::CDockAreaWidget* parent /TransferThis/);
+	virtual ~CDockAreaTabBar();
+	void insertTab(int Index, ads::CDockWidgetTab* Tab /Transfer/);
+	void removeTab(ads::CDockWidgetTab* Tab) /TransferBack/;
+	int count() const;
+	int currentIndex() const;
+	ads::CDockWidgetTab* currentTab() const;
+	ads::CDockWidgetTab* tab(int Index) const;
+	virtual bool eventFilter(QObject *watched, QEvent *event);
+	bool isTabOpen(int Index) const;
+	virtual QSize minimumSizeHint() const;
+	virtual QSize sizeHint() const;
+
+public slots:
+	void setCurrentIndex(int Index);
+	void closeTab(int Index);
+
+signals:
+	void currentChanging(int Index);
+	void currentChanged(int Index);
+	void tabBarClicked(int index);
+	void tabCloseRequested(int index);
+	void tabClosed(int index);
+	void tabOpened(int index);
+	void tabMoved(int from, int to);
+	void removingTab(int index);
+	void tabInserted(int index);
+};
+
+};
+
+%End

sip/DockAreaTitleBar.sip

@@ -0,0 +1,32 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockAreaTitleBar : QFrame
+{
+    %TypeHeaderCode
+    #include <DockAreaTitleBar.h>
+    %End
+
+public slots:
+	void markTabsMenuOutdated();
+
+
+public:
+	CDockAreaTitleBar(ads::CDockAreaWidget* parent /TransferThis/);
+	virtual ~CDockAreaTitleBar();
+	ads::CDockAreaTabBar* tabBar() const;
+	QAbstractButton* button(ads::TitleBarButton which) const;
+	virtual void setVisible(bool Visible);
+
+
+signals:
+	void tabBarClicked(int index);
+};
+
+};
+
+%End

sip/DockAreaWidget.sip

@@ -0,0 +1,65 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+    
+class CDockAreaWidget : QFrame
+{
+
+    %TypeHeaderCode
+    #include <DockAreaWidget.h>
+    %End
+    
+protected:
+	void insertDockWidget(int index, ads::CDockWidget* DockWidget /Transfer/, bool Activate = true);
+	void addDockWidget(ads::CDockWidget* DockWidget /Transfer/);
+	void removeDockWidget(ads::CDockWidget* DockWidget) /TransferBack/;
+	void toggleDockWidgetView(ads::CDockWidget* DockWidget, bool Open);
+	CDockWidget* nextOpenDockWidget(ads::CDockWidget* DockWidget) const;
+	int index(ads::CDockWidget* DockWidget);
+	void hideAreaWithNoVisibleContent();
+	void updateTitleBarVisibility();
+	void internalSetCurrentDockWidget(ads::CDockWidget* DockWidget /Transfer/);
+	void markTitleBarMenuOutdated();
+
+protected slots:
+	void toggleView(bool Open);
+    
+public:
+	CDockAreaWidget(ads::CDockManager* DockManager /TransferThis/, ads::CDockContainerWidget* parent /TransferThis/);
+	virtual ~CDockAreaWidget();
+	ads::CDockManager* dockManager() const;
+	ads::CDockContainerWidget* dockContainer() const;
+	QRect titleBarGeometry() const;
+	QRect contentAreaGeometry() const;
+	int dockWidgetsCount() const;
+	QList<ads::CDockWidget*> dockWidgets() const;
+	int openDockWidgetsCount() const;
+	QList<ads::CDockWidget*> openedDockWidgets() const;
+	ads::CDockWidget* dockWidget(int Index) const;
+	int currentIndex() const;
+	int indexOfFirstOpenDockWidget() const;
+	ads::CDockWidget* currentDockWidget() const;
+	void setCurrentDockWidget(ads::CDockWidget* DockWidget /Transfer/);
+	void saveState(QXmlStreamWriter& Stream) const;
+	ads::CDockWidget::DockWidgetFeatures features() const;
+	QAbstractButton* titleBarButton(ads::TitleBarButton which) const;
+	virtual void setVisible(bool Visible);
+
+public slots:
+	void setCurrentIndex(int index);
+	void closeArea();
+	void closeOtherAreas();
+
+signals:
+	void tabBarClicked(int index);
+    void currentChanging(int index);
+	void currentChanged(int index);
+	void viewToggled(bool Open);
+};
+
+};
+
+%End

sip/DockContainerWidget.sip

@@ -0,0 +1,154 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+/**
+ * Container that manages a number of dock areas with single dock widgets
+ * or tabyfied dock widgets in each area.
+ * Each window that support docking has a DockContainerWidget. That means
+ * the main application window and all floating windows are ore contain
+ * an DockContainerWidget.
+ */
+class CDockContainerWidget : QFrame
+{
+    %TypeHeaderCode
+    #include <DockContainerWidget.h>
+    %End
+
+protected:
+	virtual bool event(QEvent *e);
+	QSplitter* rootSplitter() const;
+	void createRootSplitter();
+	void dropFloatingWidget(ads::CFloatingDockContainer* FloatingWidget, const QPoint& TargetPos);
+	void addDockArea(ads::CDockAreaWidget* DockAreaWidget /Transfer/, ads::DockWidgetArea area = ads::CenterDockWidgetArea);
+	void removeDockArea(ads::CDockAreaWidget* area /Transfer/);
+	void saveState(QXmlStreamWriter& Stream) const;
+	bool restoreState(QXmlStreamReader& Stream, bool Testing);
+	ads::CDockAreaWidget* lastAddedDockAreaWidget(ads::DockWidgetArea area) const;
+	bool hasTopLevelDockWidget() const;
+	ads::CDockWidget* topLevelDockWidget() const;
+	ads::CDockAreaWidget* topLevelDockArea() const;
+    QList<ads::CDockWidget*> dockWidgets() const;
+    
+public:
+	/**
+	 * Default Constructor
+	 */
+	CDockContainerWidget(ads::CDockManager* DockManager /TransferThis/, QWidget* parent /TransferThis/ = 0);
+
+	/**
+	 * Virtual Destructor
+	 */
+	virtual ~CDockContainerWidget();
+
+	/**
+	 * Adds dockwidget into the given area.
+	 * If DockAreaWidget is not null, then the area parameter indicates the area
+	 * into the DockAreaWidget. If DockAreaWidget is null, the Dockwidget will
+	 * be dropped into the container.
+	 * \return Returns the dock area widget that contains the new DockWidget
+	 */
+	ads::CDockAreaWidget* addDockWidget(ads::DockWidgetArea area, ads::CDockWidget* Dockwidget /Transfer/,
+		ads::CDockAreaWidget* DockAreaWidget /Transfer/ = 0);
+
+	/**
+	 * Removes dockwidget
+	 */
+	void removeDockWidget(ads::CDockWidget* Dockwidget) /TransferBack/;
+
+	/**
+	 * Returns the current zOrderIndex
+	 */
+	virtual unsigned int zOrderIndex() const;
+
+	/**
+	 * This function returns true if this container widgets z order index is
+	 * higher than the index of the container widget given in Other parameter
+	 */
+	bool isInFrontOf(ads::CDockContainerWidget* Other) const;
+
+	/**
+	 * Returns the dock area at teh given global position or 0 if there is no
+	 * dock area at this position
+	 */
+	ads::CDockAreaWidget* dockAreaAt(const QPoint& GlobalPos) const;
+
+	/**
+	 * Returns the dock area at the given Index or 0 if the index is out of
+	 * range
+	 */
+	ads::CDockAreaWidget* dockArea(int Index) const;
+
+	/**
+	 * Returns the list of dock areas that are not closed
+	 * If all dock widgets in a dock area are closed, the dock area will be closed
+	 */
+	QList<ads::CDockAreaWidget*> openedDockAreas() const;
+
+	/**
+	 * Returns the number of dock areas in this container
+	 */
+	int dockAreaCount() const;
+
+	/**
+	 * Returns the number of visible dock areas
+	 */
+	int visibleDockAreaCount() const;
+
+	/**
+	 * This function returns true, if this container is in a floating widget
+	 */
+	bool isFloating() const;
+
+	/**
+	 * Dumps the layout for debugging purposes
+	 */
+	void dumpLayout();
+
+	/**
+	 * This functions returns the dock widget features of all dock widget in
+	 * this container.
+	 * A bitwise and is used to combine the flags of all dock widgets. That
+	 * means, if only dock widget does not support a certain flag, the whole
+	 * dock are does not support the flag.
+	 */
+	ads::CDockWidget::DockWidgetFeatures features() const;
+
+	/**
+	 * If this dock container is in a floating widget, this function returns
+	 * the floating widget.
+	 * Else, it returns a nullptr.
+	 */
+	ads::CFloatingDockContainer* floatingWidget() const;
+
+	/**
+	 * Call this function to close all dock areas except the KeepOpenArea
+	 */
+	void closeOtherAreas(ads::CDockAreaWidget* KeepOpenArea);
+
+signals:
+	/**
+	 * This signal is emitted if one or multiple dock areas has been added to
+	 * the internal list of dock areas.
+	 * If multiple dock areas are inserted, this signal is emitted only once
+	 */
+	void dockAreasAdded();
+
+	/**
+	 * This signal is emitted if one or multiple dock areas has been removed
+	 */
+	void dockAreasRemoved();
+
+	/**
+	 * This signal is emitted if a dock area is opened or closed via
+	 * toggleView() function
+	 */
+	void dockAreaViewToggled(ads::CDockAreaWidget* DockArea, bool Open);
+}; // class DockContainerWidget
+};
+ // namespace ads
+
+%End

sip/DockManager.sip

@@ -0,0 +1,205 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+    
+%MappedType QMap<QString, ads::CDockWidget*>
+        /TypeHint="Dict[QString, CDockWidget*]", TypeHintValue="{}"/
+{
+%TypeHeaderCode
+#include <qmap.h>
+%End
+
+%ConvertFromTypeCode
+    PyObject *d = PyDict_New();
+
+    if (!d)
+        return 0;
+    
+    QMap<QString, ads::CDockWidget*>::const_iterator it = sipCpp->constBegin();
+    QMap<QString, ads::CDockWidget*>::const_iterator end = sipCpp->constEnd();
+
+    while (it != end)
+    {
+        QString *k = new QString(it.key());
+        PyObject *kobj = sipConvertFromType(k, sipType_QString,
+                sipTransferObj);
+
+        if (!kobj)
+        {
+            delete k;
+            Py_DECREF(d);
+
+            return 0;
+        }
+
+        PyObject *vobj = sipConvertFromType(it.value(), sipType_ads_CDockWidget,
+                sipTransferObj);
+
+        if (!vobj)
+        {
+            Py_DECREF(kobj);
+            Py_DECREF(d);
+
+            return 0;
+        }
+
+        int rc = PyDict_SetItem(d, kobj, vobj);
+
+        Py_DECREF(vobj);
+        Py_DECREF(kobj);
+
+        if (rc < 0)
+        {
+            Py_DECREF(d);
+
+            return 0;
+        }
+
+        ++it;
+    }
+    
+    return d;
+%End
+
+%ConvertToTypeCode
+    if (!sipIsErr)
+            return PyDict_Check(sipPy);
+
+    QMap<QString, ads::CDockWidget*> *qm = new QMap<QString, ads::CDockWidget*>;
+    
+    Py_ssize_t pos = 0;
+    PyObject *kobj, *vobj;
+    while (PyDict_Next(sipPy, &pos, &kobj, &vobj))
+    {
+        int kstate;
+        QString *k = reinterpret_cast<QString *>(
+                sipForceConvertToType(kobj, sipType_QString, sipTransferObj,
+                        SIP_NOT_NONE, &kstate, sipIsErr));
+
+        if (*sipIsErr)
+        {
+            PyErr_Format(PyExc_TypeError,
+                    "a dict key has type '%s' but '_TYPE1_' is expected",
+                    sipPyTypeName(Py_TYPE(kobj)));
+
+            delete qm;
+
+            return 0;
+        }
+
+        int vstate;
+        ads::CDockWidget *v = reinterpret_cast<ads::CDockWidget *>(
+                sipForceConvertToType(vobj, sipType_ads_CDockWidget, sipTransferObj,
+                        SIP_NOT_NONE, &vstate, sipIsErr));
+
+        if (*sipIsErr)
+        {
+            PyErr_Format(PyExc_TypeError,
+                    "a dict value has type '%s' but '_TYPE2_' is expected",
+                    sipPyTypeName(Py_TYPE(vobj)));
+
+            sipReleaseType(k, sipType_QString, kstate);
+            delete qm;
+
+            return 0;
+        }
+
+        qm->insert(*k, v);
+
+        sipReleaseType(v, sipType_ads_CDockWidget, vstate);
+        sipReleaseType(k, sipType_QString, kstate);
+    }
+ 
+    *sipCppPtr = qm;
+ 
+    return sipGetState(sipTransferObj);
+%End
+};
+
+namespace ads
+{
+
+class CDockManager : ads::CDockContainerWidget
+{
+    
+    %TypeHeaderCode
+    #include <DockManager.h>
+    %End
+
+protected:
+	void registerFloatingWidget(ads::CFloatingDockContainer* FloatingWidget /Transfer/);
+	void removeFloatingWidget(ads::CFloatingDockContainer* FloatingWidget) /TransferBack/;
+	void registerDockContainer(ads::CDockContainerWidget* DockContainer /Transfer/);
+	void removeDockContainer(ads::CDockContainerWidget* DockContainer /TransferBack/);
+	ads::CDockOverlay* containerOverlay() const;
+	ads::CDockOverlay* dockAreaOverlay() const;
+
+public:
+	enum eViewMenuInsertionOrder
+	{
+		MenuSortedByInsertion,
+		MenuAlphabeticallySorted
+	};
+
+	enum eConfigFlag
+	{
+		ActiveTabHasCloseButton, 
+		DockAreaHasCloseButton,
+		DockAreaCloseButtonClosesTab,
+		OpaqueSplitterResize,
+		XmlAutoFormattingEnabled,
+		XmlCompressionEnabled,
+		TabCloseButtonIsToolButton,
+		AllTabsHaveCloseButton,
+		RetainTabSizeWhenCloseButtonHidden,
+		DefaultConfig,
+	};
+    typedef QFlags<ads::CDockManager::eConfigFlag> ConfigFlags;
+
+	CDockManager(QWidget* parent /TransferThis/ = 0);
+	virtual ~CDockManager();
+	static ads::CDockManager::ConfigFlags configFlags();
+	static void setConfigFlags(const ads::CDockManager::ConfigFlags Flags);
+	static void setConfigFlag(ads::CDockManager::eConfigFlag Flag, bool On = true);
+	ads::CDockAreaWidget* addDockWidget(ads::DockWidgetArea area, ads::CDockWidget* Dockwidget /Transfer/,
+		ads::CDockAreaWidget* DockAreaWidget /Transfer/ = 0);
+	ads::CDockAreaWidget* addDockWidgetTab(ads::DockWidgetArea area,
+		ads::CDockWidget* Dockwidget /Transfer/);
+	ads::CDockAreaWidget* addDockWidgetTabToArea(ads::CDockWidget* Dockwidget /Transfer/,
+		ads::CDockAreaWidget* DockAreaWidget /Transfer/);
+	ads::CDockWidget* findDockWidget(const QString& ObjectName) const;
+	void removeDockWidget(ads::CDockWidget* Dockwidget) /TransferBack/;
+	QMap<QString, ads::CDockWidget*> dockWidgetsMap() const;
+	const QList<ads::CDockContainerWidget*> dockContainers() const;
+	const QList<ads::CFloatingDockContainer*> floatingWidgets() const;
+	virtual unsigned int zOrderIndex() const;
+	QByteArray saveState(int version = 0) const;
+	bool restoreState(const QByteArray &state, int version = 0);
+	void addPerspective(const QString& UniquePrespectiveName);
+	void removePerspective(const QString& Name);
+	void removePerspectives(const QStringList& Names);
+	QStringList perspectiveNames() const;
+	void savePerspectives(QSettings& Settings) const;
+	void loadPerspectives(QSettings& Settings);
+	QAction* addToggleViewActionToMenu(QAction* ToggleViewAction /Transfer/,
+		const QString& Group = QString(), const QIcon& GroupIcon = QIcon());
+	QMenu* viewMenu() const;
+	void setViewMenuInsertionOrder(ads::CDockManager::eViewMenuInsertionOrder Order);
+	bool isRestoringState() const;
+	static int startDragDistance();
+
+public slots:
+	void openPerspective(const QString& PerspectiveName);
+
+signals:
+	void perspectiveListChanged();
+	void perspectivesRemoved();
+	void restoringState();
+    void stateRestored();
+    void openingPerspective(const QString& PerspectiveName);
+    void perspectiveOpened(const QString& PerspectiveName);
+};
+
+};
+
+%End

sip/DockOverlay.sip

@@ -0,0 +1,77 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockOverlay : public QFrame
+{
+    %TypeHeaderCode
+    #include <DockOverlay.h>
+    %End
+
+public:
+
+	enum eMode
+	{
+		ModeDockAreaOverlay,
+		ModeContainerOverlay
+	};
+
+	CDockOverlay(QWidget* parent /TransferThis/, eMode Mode = ads::CDockOverlay::ModeDockAreaOverlay);
+	virtual ~CDockOverlay();
+	void setAllowedAreas(ads::DockWidgetAreas areas);
+	ads::DockWidgetAreas allowedAreas() const;
+	ads::DockWidgetArea dropAreaUnderCursor() const;
+	ads::DockWidgetArea showOverlay(QWidget* target);
+	void hideOverlay();
+	void enableDropPreview(bool Enable);
+	QRect dropOverlayRect() const;
+	virtual bool event(QEvent *e);
+
+protected:
+	virtual void paintEvent(QPaintEvent *e);
+	virtual void showEvent(QShowEvent* e);
+	virtual void hideEvent(QHideEvent* e);
+};
+
+
+class CDockOverlayCross : public QWidget
+{
+
+public:
+	enum eIconColor
+	{
+		FrameColor,
+		WindowBackgroundColor,
+		OverlayColor,
+		ArrowColor,
+		ShadowColor
+	};
+    
+protected:
+    QString iconColors() const;
+    QColor iconColor() const;
+    void setIconFrameColor(const QColor& Color);
+    void setIconBackgroundColor(const QColor& Color);
+    void setIconOverlayColor(const QColor& Color);
+    void setIconArrowColor(const QColor& Color);
+    void setIconShadowColor(const QColor& Color);
+
+public:
+	CDockOverlayCross(ads::CDockOverlay* overlay /TransferThis/);
+	virtual ~CDockOverlayCross();
+	void setIconColor(ads::CDockOverlayCross::eIconColor ColorIndex, const QColor& Color);
+	QColor iconColor(ads::CDockOverlayCross::eIconColor ColorIndex) const;
+	ads::DockWidgetArea cursorLocation() const;
+	void setupOverlayCross(ads::CDockOverlay::eMode Mode);
+	void updateOverlayIcons();
+	void reset();
+	void updatePosition();
+    void setIconColors(const QString& Colors);
+};
+
+};
+
+%End

sip/DockSplitter.sip

@@ -0,0 +1,23 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockSplitter : QSplitter
+{
+    %TypeHeaderCode
+    #include <DockSplitter.h>
+    %End
+
+public:
+	CDockSplitter(QWidget *parent /TransferThis/ = 0);
+	CDockSplitter(Qt::Orientation orientation, QWidget *parent /TransferThis/ = 0);
+	virtual ~CDockSplitter();
+	bool hasVisibleContent() const;
+};
+
+};
+
+%End

sip/DockWidget.sip

@@ -0,0 +1,101 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockWidget : QFrame
+{
+    %TypeHeaderCode
+    #include <DockWidget.h>
+    %End
+    
+protected:
+	void setDockManager(ads::CDockManager* DockManager /Transfer/);
+	void setDockArea(ads::CDockAreaWidget* DockArea /Transfer/);
+	void setToggleViewActionChecked(bool Checked);
+	void saveState(QXmlStreamWriter& Stream) const;
+	void flagAsUnassigned();
+	static void emitTopLevelEventForWidget(ads::CDockWidget* TopLevelDockWidget, bool Floating);
+	void emitTopLevelChanged(bool Floating);
+	void setClosedState(bool Closed);
+	void toggleViewInternal(bool Open);
+    
+public:
+	enum DockWidgetFeature
+	{
+		DockWidgetClosable,
+		DockWidgetMovable,
+		DockWidgetFloatable,
+		AllDockWidgetFeatures,
+		NoDockWidgetFeatures
+	};
+    typedef QFlags<ads::CDockWidget::DockWidgetFeature> DockWidgetFeatures;
+
+	enum eState
+	{
+		StateHidden,
+		StateDocked,
+		StateFloating
+	};
+
+	enum eInsertMode
+	{
+		AutoScrollArea,
+		ForceScrollArea,
+		ForceNoScrollArea
+	};
+
+	enum eToggleViewActionMode
+	{
+		ActionModeToggle,
+		ActionModeShow
+	};
+
+
+	CDockWidget(const QString &title, QWidget* parent /TransferThis/ = 0);
+	virtual ~CDockWidget();
+	virtual QSize minimumSizeHint() const;
+	void setWidget(QWidget* widget /Transfer/, ads::CDockWidget::eInsertMode InsertMode = AutoScrollArea);
+	QWidget* takeWidget() /TransferBack/;
+	QWidget* widget() const;
+	ads::CDockWidgetTab* tabWidget() const;
+	void setFeatures(ads::CDockWidget::DockWidgetFeatures features);
+	void setFeature(ads::CDockWidget::DockWidgetFeature flag, bool on);
+	ads::CDockWidget::DockWidgetFeatures features() const;
+	ads::CDockManager* dockManager() const;
+	ads::CDockContainerWidget* dockContainer() const;
+	ads::CDockAreaWidget* dockAreaWidget() const;
+	bool isFloating() const;
+	bool isInFloatingContainer() const;
+	bool isClosed() const;
+	QAction* toggleViewAction() const;
+	void setToggleViewActionMode(ads::CDockWidget::eToggleViewActionMode Mode);
+	void setIcon(const QIcon& Icon);
+	QIcon icon() const;
+	QToolBar* toolBar() const;
+	QToolBar* createDefaultToolBar();
+	void setToolBar(QToolBar* ToolBar);
+	void setToolBarStyle(Qt::ToolButtonStyle Style, ads::CDockWidget::eState State);
+	Qt::ToolButtonStyle toolBarStyle(ads::CDockWidget::eState State) const;
+	void setToolBarIconSize(const QSize& IconSize, ads::CDockWidget::eState State);
+	QSize toolBarIconSize(eState State) const;
+	void setTabToolTip(const QString &text);
+
+public:
+	virtual bool event(QEvent *e);
+
+public slots:
+	void toggleView(bool Open = true);
+
+signals:
+	void viewToggled(bool Open);
+	void closed();
+	void titleChanged(const QString& Title);
+	void topLevelChanged(bool topLevel);
+};
+
+};
+
+%End

sip/DockWidgetTab.sip

@@ -0,0 +1,50 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CDockWidgetTab : QFrame
+{
+    %TypeHeaderCode
+    #include <DockWidgetTab.h>
+    %End
+    
+protected:
+	virtual void mousePressEvent(QMouseEvent* ev);
+	virtual void mouseReleaseEvent(QMouseEvent* ev);
+	virtual void mouseMoveEvent(QMouseEvent* ev);
+	virtual void contextMenuEvent(QContextMenuEvent* ev);
+	virtual void mouseDoubleClickEvent(QMouseEvent *event);
+
+public:
+	CDockWidgetTab(ads::CDockWidget* DockWidget /TransferThis/, QWidget* parent /TransferThis/ = 0);
+	virtual ~CDockWidgetTab();
+	bool isActiveTab() const;
+	void setActiveTab(bool active);
+	ads::CDockWidget* dockWidget() const;
+	void setDockAreaWidget(ads::CDockAreaWidget* DockArea /Transfer/);
+	ads::CDockAreaWidget* dockAreaWidget() const;
+	void setIcon(const QIcon& Icon);
+	const QIcon& icon() const;
+	QString text() const;
+	void setText(const QString& title);
+	bool isClosable() const;
+	virtual bool event(QEvent *e);
+
+
+public slots:
+	virtual void setVisible(bool visible);
+
+signals:
+	void activeTabChanged();
+	void clicked();
+	void closeRequested();
+	void closeOtherTabsRequested();
+	void moved(const QPoint& GlobalPos);
+}; // class DockWidgetTab
+};
+ // namespace ads
+
+%End

sip/ElidingLabel.sip

@@ -0,0 +1,40 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CElidingLabel : QLabel
+{
+    %TypeHeaderCode
+    #include <ElidingLabel.h>
+    %End
+    
+protected:
+	virtual void mouseReleaseEvent(QMouseEvent* event);
+    virtual void resizeEvent( QResizeEvent *event );
+    virtual void mouseDoubleClickEvent( QMouseEvent *ev );
+    
+public:
+	CElidingLabel(QWidget* parent /TransferThis/ = 0, Qt::WindowFlags f = 0);
+	CElidingLabel(const QString& text, QWidget* parent /TransferThis/ = 0, Qt::WindowFlags f = 0);
+	virtual ~CElidingLabel();
+	Qt::TextElideMode elideMode() const;
+	void setElideMode(Qt::TextElideMode mode);
+
+
+public:
+	virtual QSize minimumSizeHint() const;
+	virtual QSize sizeHint() const;
+	void setText(const QString &text);
+	QString text() const;
+
+signals:
+	void clicked();
+	void doubleClicked();
+};
+
+};
+
+%End

sip/FloatingDockContainer.sip

@@ -0,0 +1,50 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+
+class CFloatingDockContainer : QWidget
+{
+    
+    %TypeHeaderCode
+    #include <FloatingDockContainer.h>
+    %End
+    
+protected:
+	void startFloating(const QPoint& DragStartMousePos, const QSize& Size,
+        ads::eDragState DragState, QWidget* MouseEventHandler);
+    void startDragging(const QPoint& DragStartMousePos, const QSize& Size,
+        QWidget* MouseEventHandler);
+	void finishDragging();
+	void initFloatingGeometry(const QPoint& DragStartMousePos, const QSize& Size);
+	void moveFloating();
+	bool restoreState(QXmlStreamReader& Stream, bool Testing);
+	void updateWindowTitle();
+
+
+protected:
+	virtual void changeEvent(QEvent *event);
+	virtual void moveEvent(QMoveEvent *event);
+	virtual bool event(QEvent *e);
+	virtual void closeEvent(QCloseEvent *event);
+	virtual void hideEvent(QHideEvent *event);
+	virtual void showEvent(QShowEvent *event);
+	virtual bool eventFilter(QObject *watched, QEvent *event);
+
+public:
+	CFloatingDockContainer(ads::CDockManager* DockManager /TransferThis/);
+	CFloatingDockContainer(ads::CDockAreaWidget* DockArea /TransferThis/);
+	CFloatingDockContainer(ads::CDockWidget* DockWidget /TransferThis/);
+	virtual ~CFloatingDockContainer();
+	ads::CDockContainerWidget* dockContainer() const;
+    bool isClosable() const;
+    bool hasTopLevelDockWidget() const;
+    ads::CDockWidget* topLevelDockWidget() const;
+    QList<ads::CDockWidget*> dockWidgets() const;
+};
+
+};
+
+%End

sip/ads.sip

@@ -0,0 +1,20 @@
+%Module(name=PyQtAds.QtAds.ads, call_super_init=True, keyword_arguments="Optional", use_limited_api=True)
+%Import QtCore/QtCoremod.sip
+%DefaultSupertype sip.simplewrapper
+%Platforms {Linux macOS Windows}
+
+%Include ads_globals.sip
+%Include DockWidget.sip
+%Include DockAreaTabBar.sip
+%Include DockAreaTitleBar.sip
+%Include DockAreaWidget.sip
+%Include DockContainerWidget.sip
+%Include DockManager.sip
+%Include DockOverlay.sip
+%Include DockSplitter.sip
+%Include DockWidgetTab.sip
+%Include ElidingLabel.sip
+%Include FloatingDockContainer.sip
+%If (Linux)
+    %Include linux/FloatingWidgetTitleBar.sip
+%End

sip/ads_globals.sip

@@ -0,0 +1,44 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+    %TypeHeaderCode
+    #include <ads_globals.h>
+    %End
+
+    enum DockWidgetArea
+    {
+        NoDockWidgetArea,
+        LeftDockWidgetArea,
+        RightDockWidgetArea,
+        TopDockWidgetArea,
+        BottomDockWidgetArea,
+        CenterDockWidgetArea,
+
+        InvalidDockWidgetArea,
+        OuterDockAreas,
+        AllDockAreas
+    };
+    typedef QFlags<ads::DockWidgetArea> DockWidgetAreas;
+
+
+    enum TitleBarButton
+    {
+        TitleBarButtonTabsMenu,
+        TitleBarButtonUndock,
+        TitleBarButtonClose
+    };
+
+    enum eDragState
+    {
+        DraggingInactive,
+        DraggingMousePressed,
+        DraggingTab,
+        DraggingFloatingWidget
+    };
+
+};
+
+%End

sip/linux/FloatingWidgetTitleBar.sip

@@ -0,0 +1,31 @@
+%Import QtWidgets/QtWidgetsmod.sip
+
+%If (Qt_5_0_0 -)
+
+namespace ads
+{
+    %TypeHeaderCode
+    #include <FloatingWidgetTitleBar.h>
+    %End
+    
+class CFloatingWidgetTitleBar : QWidget
+{
+
+protected:
+	virtual void mousePressEvent(QMouseEvent *ev);
+	virtual void mouseReleaseEvent(QMouseEvent *ev);
+	virtual void mouseMoveEvent(QMouseEvent *ev);
+
+public:
+	explicit CFloatingWidgetTitleBar(CFloatingDockContainer *parent /TransferThis/ = 0);
+	virtual ~CFloatingWidgetTitleBar();
+	void enableCloseButton(bool Enable);
+	void setTitle(const QString &Text);
+
+signals:
+	void closeRequested();
+};
+
+};
+
+%End

src/DockAreaTabBar.cpp

@@ -1,3 +1,22 @@
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
 //============================================================================
 /// \file   DockAreaTabBar.cpp
 /// \author Uwe Kindler
@@ -13,11 +32,18 @@
 #include <QMouseEvent>
 #include <QScrollBar>
 #include <QDebug>
+#include <QBoxLayout>
+#include <QApplication>
 
 #include "FloatingDockContainer.h"
 #include "DockAreaWidget.h"
 #include "DockOverlay.h"
 #include "DockManager.h"
+#include "DockWidget.h"
+#include "DockWidgetTab.h"
+
+#include <iostream>
+
 
 namespace ads
 {
@@ -30,11 +56,20 @@ struct DockAreaTabBarPrivate
 	QPoint DragStartMousePos;
 	CDockAreaWidget* DockArea;
 	CFloatingDockContainer* FloatingWidget = nullptr;
+	QWidget* TabsContainerWidget;
+	QBoxLayout* TabsLayout;
+	int CurrentIndex = -1;
 
 	/**
 	 * Private data constructor
 	 */
 	DockAreaTabBarPrivate(CDockAreaTabBar* _public);
+
+	/**
+	 * Update tabs after current index changed or when tabs are removed.
+	 * The function reassigns the stylesheet to update the tabs
+	 */
+	void updateTabs();
 };
 // struct DockAreaTabBarPrivate
 
@@ -45,17 +80,54 @@ DockAreaTabBarPrivate::DockAreaTabBarPrivate(CDockAreaTabBar* _public) :
 
 }
 
+
+//============================================================================
+void DockAreaTabBarPrivate::updateTabs()
+{
+	// Set active TAB and update all other tabs to be inactive
+	for (int i = 0; i < _this->count(); ++i)
+	{
+		auto TabWidget = _this->tab(i);
+		if (!TabWidget)
+		{
+			continue;
+		}
+
+		if (i == CurrentIndex)
+		{
+			TabWidget->show();
+			TabWidget->setActiveTab(true);
+			_this->ensureWidgetVisible(TabWidget);
+		}
+		else
+		{
+			TabWidget->setActiveTab(false);
+		}
+	}
+}
+
+
 //============================================================================
 CDockAreaTabBar::CDockAreaTabBar(CDockAreaWidget* parent) :
 	QScrollArea(parent),
 	d(new DockAreaTabBarPrivate(this))
 {
 	d->DockArea = parent;
-	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Ignored);
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
 	setFrameStyle(QFrame::NoFrame);
 	setWidgetResizable(true);
 	setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 	setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+	d->TabsContainerWidget = new QWidget();
+	d->TabsContainerWidget->setObjectName("tabsContainerWidget");
+	setWidget(d->TabsContainerWidget);
+
+	d->TabsLayout = new QBoxLayout(QBoxLayout::LeftToRight);
+	d->TabsLayout->setContentsMargins(0, 0, 0, 0);
+	d->TabsLayout->setSpacing(0);
+	d->TabsLayout->addStretch(1);
+	d->TabsContainerWidget->setLayout(d->TabsLayout);
 }
 
 //============================================================================
@@ -99,7 +171,7 @@ void CDockAreaTabBar::mouseReleaseEvent(QMouseEvent* ev)
 {
 	if (ev->button() == Qt::LeftButton)
 	{
-		qDebug() << "CTabsScrollArea::mouseReleaseEvent";
+        ADS_PRINT("CTabsScrollArea::mouseReleaseEvent");
 		ev->accept();
 		d->FloatingWidget = nullptr;
 		d->DragStartMousePos = QPoint();
@@ -133,9 +205,17 @@ void CDockAreaTabBar::mouseMoveEvent(QMouseEvent* ev)
 		return;
 	}
 
-	if (!this->geometry().contains(ev->pos()))
+	// If one single dock widget in this area is not floatable then the whole
+	// area is not floatable
+	if (!d->DockArea->features().testFlag(CDockWidget::DockWidgetFloatable))
 	{
-		qDebug() << "CTabsScrollArea::startFloating";
+		return;
+	}
+
+	int DragDistance = (d->DragStartMousePos - ev->pos()).manhattanLength();
+	if (DragDistance >= CDockManager::startDragDistance())
+	{
+        ADS_PRINT("CTabsScrollArea::startFloating");
 		startFloating(d->DragStartMousePos);
 		auto Overlay = d->DockArea->dockManager()->containerOverlay();
 		Overlay->setAllowedAreas(OuterDockAreas);
@@ -155,18 +235,353 @@ void CDockAreaTabBar::mouseDoubleClickEvent(QMouseEvent *event)
 	{
 		return;
 	}
-	startFloating(event->pos());
+
+	if (!d->DockArea->features().testFlag(CDockWidget::DockWidgetFloatable))
+	{
+		return;
+	}
+	makeAreaFloating(event->pos(), DraggingInactive);
 }
 
 
 //============================================================================
-void CDockAreaTabBar::startFloating(const QPoint& Pos)
+CFloatingDockContainer* CDockAreaTabBar::makeAreaFloating(const QPoint& Offset,
+	eDragState DragState)
 {
 	QSize Size = d->DockArea->size();
 	CFloatingDockContainer* FloatingWidget = new CFloatingDockContainer(d->DockArea);
-	FloatingWidget->startFloating(Pos, Size);
-	d->FloatingWidget = FloatingWidget;
+    FloatingWidget->startFloating(Offset, Size, DragState, nullptr);
+	auto TopLevelDockWidget = FloatingWidget->topLevelDockWidget();
+	if (TopLevelDockWidget)
+	{
+		TopLevelDockWidget->emitTopLevelChanged(true);
+	}
+
+	return FloatingWidget;
 }
+
+
+//============================================================================
+void CDockAreaTabBar::startFloating(const QPoint& Offset)
+{
+	d->FloatingWidget = makeAreaFloating(Offset, DraggingFloatingWidget);
+}
+
+
+//============================================================================
+void CDockAreaTabBar::setCurrentIndex(int index)
+{
+	if (index == d->CurrentIndex)
+	{
+		return;
+	}
+
+	if (index < -1 || index > (count() - 1))
+	{
+		qWarning() << Q_FUNC_INFO << "Invalid index" << index;
+		return;
+    }
+
+    emit currentChanging(index);
+	d->CurrentIndex = index;
+	d->updateTabs();
+	emit currentChanged(index);
+}
+
+
+//============================================================================
+int CDockAreaTabBar::count() const
+{
+	// The tab bar contains a stretch item as last item
+	return d->TabsLayout->count() - 1;
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::insertTab(int Index, CDockWidgetTab* Tab)
+{
+	d->TabsLayout->insertWidget(Index, Tab);
+	connect(Tab, SIGNAL(clicked()), this, SLOT(onTabClicked()));
+	connect(Tab, SIGNAL(closeRequested()), this, SLOT(onTabCloseRequested()));
+	connect(Tab, SIGNAL(closeOtherTabsRequested()), this, SLOT(onCloseOtherTabsRequested()));
+	connect(Tab, SIGNAL(moved(const QPoint&)), this, SLOT(onTabWidgetMoved(const QPoint&)));
+	Tab->installEventFilter(this);
+	emit tabInserted(Index);
+	if (Index <= d->CurrentIndex)
+	{
+		setCurrentIndex(d->CurrentIndex + 1);
+	}
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::removeTab(CDockWidgetTab* Tab)
+{
+	if (!count())
+	{
+		return;
+	}
+    ADS_PRINT("CDockAreaTabBar::removeTab ");
+	int NewCurrentIndex = currentIndex();
+	int RemoveIndex = d->TabsLayout->indexOf(Tab);
+	if (count() == 1)
+	{
+		NewCurrentIndex = -1;
+	}
+	if (NewCurrentIndex > RemoveIndex)
+	{
+		NewCurrentIndex--;
+	}
+	else if (NewCurrentIndex == RemoveIndex)
+	{
+		NewCurrentIndex = -1;
+		// First we walk to the right to search for the next visible tab
+		for (int i = (RemoveIndex + 1); i < count(); ++i)
+		{
+			if (tab(i)->isVisibleTo(this))
+			{
+				NewCurrentIndex = i - 1;
+				break;
+			}
+		}
+
+		// If there is no visible tab right to this tab then we walk to
+		// the left to find a visible tab
+		if (NewCurrentIndex < 0)
+		{
+			for (int i = (RemoveIndex - 1); i >= 0; --i)
+			{
+				if (tab(i)->isVisibleTo(this))
+				{
+					NewCurrentIndex = i;
+					break;
+				}
+			}
+		}
+	}
+
+	emit removingTab(RemoveIndex);
+	d->TabsLayout->removeWidget(Tab);
+	Tab->disconnect(this);
+	Tab->removeEventFilter(this);
+    ADS_PRINT("NewCurrentIndex " << NewCurrentIndex);
+	if (NewCurrentIndex != d->CurrentIndex)
+	{
+		setCurrentIndex(NewCurrentIndex);
+	}
+	else
+	{
+		d->updateTabs();
+	}
+}
+
+
+//===========================================================================
+int CDockAreaTabBar::currentIndex() const
+{
+	return d->CurrentIndex;
+}
+
+
+//===========================================================================
+CDockWidgetTab* CDockAreaTabBar::currentTab() const
+{
+	if (d->CurrentIndex < 0)
+	{
+		return nullptr;
+	}
+	else
+	{
+		return qobject_cast<CDockWidgetTab*>(d->TabsLayout->itemAt(d->CurrentIndex)->widget());
+	}
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::onTabClicked()
+{
+	CDockWidgetTab* Tab = qobject_cast<CDockWidgetTab*>(sender());
+	if (!Tab)
+	{
+		return;
+	}
+
+	int index = d->TabsLayout->indexOf(Tab);
+	if (index < 0)
+	{
+		return;
+	}
+	setCurrentIndex(index);
+ 	emit tabBarClicked(index);
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::onTabCloseRequested()
+{
+	CDockWidgetTab* Tab = qobject_cast<CDockWidgetTab*>(sender());
+	int Index = d->TabsLayout->indexOf(Tab);
+	closeTab(Index);
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::onCloseOtherTabsRequested()
+{
+	auto Sender = qobject_cast<CDockWidgetTab*>(sender());
+	for (int i = 0; i < count(); ++i)
+	{
+		auto Tab = tab(i);
+		if (Tab->isClosable() && !Tab->isHidden() && Tab != Sender)
+		{
+			closeTab(i);
+		}
+	}
+}
+
+
+//===========================================================================
+CDockWidgetTab* CDockAreaTabBar::tab(int Index) const
+{
+	if (Index >= count() || Index < 0)
+	{
+		return nullptr;
+	}
+	return qobject_cast<CDockWidgetTab*>(d->TabsLayout->itemAt(Index)->widget());
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::onTabWidgetMoved(const QPoint& GlobalPos)
+{
+	CDockWidgetTab* MovingTab = qobject_cast<CDockWidgetTab*>(sender());
+	if (!MovingTab)
+	{
+		return;
+	}
+
+	int fromIndex = d->TabsLayout->indexOf(MovingTab);
+	auto MousePos = mapFromGlobal(GlobalPos);
+	int toIndex = -1;
+	// Find tab under mouse
+	for (int i = 0; i < count(); ++i)
+	{
+		CDockWidgetTab* DropTab = tab(i);
+		if (DropTab == MovingTab || !DropTab->isVisibleTo(this)
+		    || !DropTab->geometry().contains(MousePos))
+		{
+			continue;
+		}
+
+		toIndex = d->TabsLayout->indexOf(DropTab);
+		if (toIndex == fromIndex)
+		{
+			toIndex = -1;
+			continue;
+		}
+
+		if (toIndex < 0)
+		{
+			toIndex = 0;
+		}
+		break;
+	}
+
+	// Now check if the mouse is behind the last tab
+	if (toIndex < 0)
+	{
+		if (MousePos.x() > tab(count() - 1)->geometry().right())
+		{
+            ADS_PRINT("after all tabs");
+			toIndex = count() - 1;
+		}
+		else
+		{
+			toIndex = fromIndex;
+		}
+	}
+
+	d->TabsLayout->removeWidget(MovingTab);
+	d->TabsLayout->insertWidget(toIndex, MovingTab);
+	if (toIndex >= 0)
+	{
+        ADS_PRINT("tabMoved from " << fromIndex << " to " << toIndex);
+		emit tabMoved(fromIndex, toIndex);
+		setCurrentIndex(toIndex);
+	}
+}
+
+
+//===========================================================================
+void CDockAreaTabBar::closeTab(int Index)
+{
+	if (Index < 0 || Index >= count())
+	{
+		return;
+	}
+
+	auto Tab = tab(Index);
+	if (Tab->isHidden())
+	{
+		return;
+	}
+	Tab->hide();
+	emit tabCloseRequested(Index);
+}
+
+
+//===========================================================================
+bool CDockAreaTabBar::eventFilter(QObject *watched, QEvent *event)
+{
+	bool Result = Super::eventFilter(watched, event);
+	CDockWidgetTab* Tab = qobject_cast<CDockWidgetTab*>(watched);
+	if (!Tab)
+	{
+		return Result;
+	}
+
+	switch (event->type())
+	{
+	case QEvent::Hide:
+		 emit tabClosed(d->TabsLayout->indexOf(Tab)); break;
+	case QEvent::Show:
+		 emit tabOpened(d->TabsLayout->indexOf(Tab)); break;
+	default:
+		break;
+	}
+
+	return Result;
+}
+
+
+//===========================================================================
+bool CDockAreaTabBar::isTabOpen(int Index) const
+{
+	if (Index < 0 || Index >= count())
+	{
+		return false;
+	}
+
+	return !tab(Index)->isHidden();
+}
+
+
+//===========================================================================
+QSize CDockAreaTabBar::minimumSizeHint() const
+{
+	QSize Size = sizeHint();
+	Size.setWidth(Super::minimumSizeHint().width());// this defines the minimum width of a dock area
+	return Size;
+}
+
+//===========================================================================
+QSize CDockAreaTabBar::sizeHint() const
+{
+	QSize Size = Super::sizeHint();
+	Size.setHeight(d->TabsContainerWidget->sizeHint().height());
+	return Size;
+}
+
 } // namespace ads
 
 //---------------------------------------------------------------------------

src/DockAreaTabBar.h

@@ -1,5 +1,24 @@
 #ifndef DockAreaTabBarH
 #define DockAreaTabBarH
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
 //============================================================================
 /// \file   DockAreaTabBar.h
 /// \author Uwe Kindler
@@ -11,26 +30,42 @@
 //                                   INCLUDES
 //============================================================================
 #include <QScrollArea>
+#include "ads_globals.h"
 
 namespace ads
 {
 class CDockAreaWidget;
+class CDockWidgetTab;
 struct DockAreaTabBarPrivate;
+class CDockAreaTitleBar;
+class CFloatingDockContainer;
 
 /**
  * Custom tabbar implementation for tab area that is shown on top of a
  * dock area widget.
  * The tabbar displays the tab widgets of the contained dock widgets.
+ * We cannot use QTabBar here because it does a lot of fancy animations
+ * that will crash the application if a tab is removed while the animation
+ * has not finished. And we need to remove a tab, if the user drags a
+ * a dock widget out of a group of tabbed widgets
  */
-class CDockAreaTabBar : public QScrollArea
+class ADS_EXPORT CDockAreaTabBar : public QScrollArea
 {
 	Q_OBJECT
 private:
 	DockAreaTabBarPrivate* d; ///< private data (pimpl)
-	friend class DockAreaTabBarPrivate;
+	friend struct DockAreaTabBarPrivate;
+	friend class CDockAreaTitleBar;
+
+private slots:
+	void onTabClicked();
+	void onTabCloseRequested();
+	void onCloseOtherTabsRequested();
+	void onTabWidgetMoved(const QPoint& GlobalPos);
 
 protected:
 	virtual void wheelEvent(QWheelEvent* Event) override;
+
 	/**
 	 * Stores mouse position to detect dragging
 	 */
@@ -55,9 +90,18 @@ protected:
 	/**
 	 * Starts floating
 	 */
-	void startFloating(const QPoint& Pos);
+	void startFloating(const QPoint& Offset);
+
+	/**
+	 * Makes the dock area floating
+	 */
+	CFloatingDockContainer* makeAreaFloating(const QPoint& Offset,
+		eDragState DragState);
+
 
 public:
+	using Super = QScrollArea;
+
 	/**
 	 * Default Constructor
 	 */
@@ -67,6 +111,129 @@ public:
 	 * Virtual Destructor
 	 */
 	virtual ~CDockAreaTabBar();
+
+	/**
+	 * Inserts the given dock widget tab at the given position.
+	 * Inserting a new tab at an index less than or equal to the current index
+	 * will increment the current index, but keep the current tab.
+	 */
+	void insertTab(int Index, CDockWidgetTab* Tab);
+
+	/**
+	 * Removes the given DockWidgetTab from the tabbar
+	 */
+	void removeTab(CDockWidgetTab* Tab);
+
+	/**
+	 * Returns the number of tabs in this tabbar
+	 */
+	int count() const;
+
+	/**
+	 * Returns the current index or -1 if no tab is selected
+	 */
+	int currentIndex() const;
+
+	/**
+	 * Returns the current tab or a nullptr if no tab is selected.
+	 */
+	CDockWidgetTab* currentTab() const;
+
+	/**
+	 * Returns the tab with the given index
+	 */
+	CDockWidgetTab* tab(int Index) const;
+
+	/**
+	 * Filters the tab widget events
+	 */
+	virtual bool eventFilter(QObject *watched, QEvent *event) override;
+
+	/**
+	 * This function returns true if the tab is open, that means if it is
+	 * visible to the user. If the function returns false, the tab is
+	 * closed
+	 */
+	bool isTabOpen(int Index) const;
+
+	/**
+	 * Overrides the minimumSizeHint() function of QScrollArea
+	 * The minimumSizeHint() is bigger than the sizeHint () for the scroll
+	 * area because even if the scrollbars are invisible, the required speace
+	 * is reserved in the minimumSizeHint(). This override simply returns
+	 * sizeHint();
+	 */
+	virtual QSize minimumSizeHint() const override;
+
+	/**
+	 * The function provides a sizeHint that matches the height of the
+	 * internal viewport.
+	 */
+	virtual QSize sizeHint() const override;
+
+public slots:
+	/**
+	 * This property sets the index of the tab bar's visible tab
+	 */
+	void setCurrentIndex(int Index);
+
+	/**
+	 * This function will close the tab given in Index param.
+	 * Closing a tab means, the tab will be hidden, it will not be removed
+	 */
+	void closeTab(int Index);
+
+signals:
+    /**
+     * This signal is emitted when the tab bar's current tab is about to be changed. The new
+     * current has the given index, or -1 if there isn't a new one.
+     */
+	void currentChanging(int Index);
+
+	/**
+	 * This signal is emitted when the tab bar's current tab changes. The new
+	 * current has the given index, or -1 if there isn't a new one
+	 */
+	void currentChanged(int Index);
+
+	/**
+	 * This signal is emitted when user clicks on a tab
+	 */
+	void tabBarClicked(int index);
+
+	/**
+	 * This signal is emitted when the close button on a tab is clicked.
+	 * The index is the index that should be closed.
+	 */
+	void tabCloseRequested(int index);
+
+	/**
+	 * This signal is emitted if a tab has been closed
+	 */
+	void tabClosed(int index);
+
+	/**
+	 * This signal is emitted if a tab has been opened.
+	 * A tab is opened if it has been made visible
+	 */
+	void tabOpened(int index);
+
+	/**
+	 * This signal is emitted when the tab has moved the tab at index position
+	 * from to index position to.
+	 */
+	void tabMoved(int from, int to);
+
+	/**
+	 * This signal is emitted, just before the tab with the given index is
+	 * removed
+	 */
+	void removingTab(int index);
+
+	/**
+	 * This signal is emitted if a tab has been inserted
+	 */
+	void tabInserted(int index);
 }; // class CDockAreaTabBar
 } // namespace ads
 //-----------------------------------------------------------------------------

src/DockAreaTitleBar.cpp

@@ -0,0 +1,370 @@
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   DockAreaTitleBar.cpp
+/// \author Uwe Kindler
+/// \date   12.10.2018
+/// \brief  Implementation of CDockAreaTitleBar class
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "DockAreaTitleBar.h"
+
+#include <QPushButton>
+#include <QToolButton>
+#include <QBoxLayout>
+#include <QStyle>
+#include <QMenu>
+#include <QScrollArea>
+#include <QMouseEvent>
+#include <QDebug>
+
+#include "ads_globals.h"
+#include "FloatingDockContainer.h"
+#include "DockAreaWidget.h"
+#include "DockOverlay.h"
+#include "DockManager.h"
+#include "DockWidget.h"
+#include "DockWidgetTab.h"
+#include "DockAreaTabBar.h"
+
+#include <iostream>
+
+namespace ads
+{
+using tTileBarButton = QToolButton;
+/**
+ * Private data class of CDockAreaTitleBar class (pimpl)
+ */
+struct DockAreaTitleBarPrivate
+{
+	CDockAreaTitleBar* _this;
+	tTileBarButton* TabsMenuButton;
+	tTileBarButton* UndockButton;
+	tTileBarButton* CloseButton;
+	QBoxLayout* TopLayout;
+	CDockAreaWidget* DockArea;
+	CDockAreaTabBar* TabBar;
+	bool MenuOutdated = true;
+	QMenu* TabsMenu;
+
+	/**
+	 * Private data constructor
+	 */
+	DockAreaTitleBarPrivate(CDockAreaTitleBar* _public);
+
+	/**
+	 * Creates the title bar close and menu buttons
+	 */
+	void createButtons();
+
+	/**
+	 * Creates the internal TabBar
+	 */
+	void createTabBar();
+
+	/**
+	 * Convenience function for DockManager access
+	 */
+	CDockManager* dockManager() const
+	{
+		return DockArea->dockManager();
+	}
+
+	/**
+	 * Returns true if the given config flag is set
+	 */
+	bool testConfigFlag(CDockManager::eConfigFlag Flag) const
+	{
+		return CDockManager::configFlags().testFlag(Flag);
+	}
+
+    /**
+     * Helper function to set title bar button icons depending on operating
+     * system and to avoid duplicated code. On windows the standard icons
+     * are blurry since Qt 5.11 so we need to do some additional steps
+     */
+    void setTitleBarButtonIcon(tTileBarButton* Button, QStyle::StandardPixmap StandarPixmap)
+    {
+    #ifdef Q_OS_LINUX
+        Button->setIcon(_this->style()->standardIcon(StandarPixmap));
+    #else
+        QIcon Icon;
+        QPixmap normalPixmap = _this->style()->standardPixmap(StandarPixmap, 0, Button);
+        Icon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25), QIcon::Disabled);
+        Icon.addPixmap(normalPixmap, QIcon::Normal);
+        Button->setIcon(Icon);
+    #endif
+    }
+};// struct DockAreaTitleBarPrivate
+
+
+
+//============================================================================
+DockAreaTitleBarPrivate::DockAreaTitleBarPrivate(CDockAreaTitleBar* _public) :
+	_this(_public)
+{
+
+}
+
+
+//============================================================================
+void DockAreaTitleBarPrivate::createButtons()
+{
+	QSizePolicy ButtonSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
+    // Tabs menu button
+	TabsMenuButton = new tTileBarButton();
+	TabsMenuButton->setObjectName("tabsMenuButton");
+	TabsMenuButton->setAutoRaise(true);
+	TabsMenuButton->setPopupMode(QToolButton::InstantPopup);
+    setTitleBarButtonIcon(TabsMenuButton, QStyle::SP_TitleBarUnshadeButton);
+	QMenu* TabsMenu = new QMenu(TabsMenuButton);
+#ifndef QT_NO_TOOLTIP
+	TabsMenu->setToolTipsVisible(true);
+#endif
+	_this->connect(TabsMenu, SIGNAL(aboutToShow()), SLOT(onTabsMenuAboutToShow()));
+	TabsMenuButton->setMenu(TabsMenu);
+#ifndef QT_NO_TOOLTIP
+	TabsMenuButton->setToolTip(QObject::tr("List all tabs"));
+#endif
+	TabsMenuButton->setSizePolicy(ButtonSizePolicy);
+	TopLayout->addWidget(TabsMenuButton, 0);
+	_this->connect(TabsMenuButton->menu(), SIGNAL(triggered(QAction*)),
+		SLOT(onTabsMenuActionTriggered(QAction*)));
+
+
+	// Undock button
+	UndockButton = new tTileBarButton();
+	UndockButton->setObjectName("undockButton");
+	UndockButton->setAutoRaise(true);
+#ifndef QT_NO_TOOLTIP
+	UndockButton->setToolTip(QObject::tr("Detach Group"));
+#endif
+    setTitleBarButtonIcon(UndockButton, QStyle::SP_TitleBarNormalButton);
+    UndockButton->setSizePolicy(ButtonSizePolicy);
+	TopLayout->addWidget(UndockButton, 0);
+	_this->connect(UndockButton, SIGNAL(clicked()), SLOT(onUndockButtonClicked()));
+
+
+    // Close button
+	CloseButton = new tTileBarButton();
+	CloseButton->setObjectName("closeButton");
+	CloseButton->setAutoRaise(true);
+    setTitleBarButtonIcon(CloseButton, QStyle::SP_TitleBarCloseButton);
+#ifndef QT_NO_TOOLTIP
+	if (testConfigFlag(CDockManager::DockAreaCloseButtonClosesTab))
+	{
+		CloseButton->setToolTip(QObject::tr("Close Active Tab"));
+	}
+	else
+	{
+		CloseButton->setToolTip(QObject::tr("Close Group"));
+	}
+#endif
+	CloseButton->setSizePolicy(ButtonSizePolicy);
+	CloseButton->setIconSize(QSize(16, 16));
+	if (testConfigFlag(CDockManager::DockAreaHasCloseButton))
+	{
+		TopLayout->addWidget(CloseButton, 0);
+	}
+	_this->connect(CloseButton, SIGNAL(clicked()), SLOT(onCloseButtonClicked()));
+}
+
+
+//============================================================================
+void DockAreaTitleBarPrivate::createTabBar()
+{
+	TabBar = new CDockAreaTabBar(DockArea);
+	TopLayout->addWidget(TabBar);
+	_this->connect(TabBar, SIGNAL(tabClosed(int)), SLOT(markTabsMenuOutdated()));
+	_this->connect(TabBar, SIGNAL(tabOpened(int)), SLOT(markTabsMenuOutdated()));
+	_this->connect(TabBar, SIGNAL(tabInserted(int)), SLOT(markTabsMenuOutdated()));
+	_this->connect(TabBar, SIGNAL(removingTab(int)), SLOT(markTabsMenuOutdated()));
+	_this->connect(TabBar, SIGNAL(tabMoved(int, int)), SLOT(markTabsMenuOutdated()));
+	_this->connect(TabBar, SIGNAL(currentChanged(int)), SLOT(onCurrentTabChanged(int)));
+	_this->connect(TabBar, SIGNAL(tabBarClicked(int)), SIGNAL(tabBarClicked(int)));
+
+	TabBar->setContextMenuPolicy(Qt::CustomContextMenu);
+	_this->connect(TabBar, SIGNAL(customContextMenuRequested(const QPoint&)),
+		SLOT(showContextMenu(const QPoint&)));
+}
+
+
+//============================================================================
+CDockAreaTitleBar::CDockAreaTitleBar(CDockAreaWidget* parent) :
+	QFrame(parent),
+	d(new DockAreaTitleBarPrivate(this))
+{
+	d->DockArea = parent;
+
+	setObjectName("dockAreaTitleBar");
+	d->TopLayout = new QBoxLayout(QBoxLayout::LeftToRight);
+	d->TopLayout->setContentsMargins(0, 0, 0, 0);
+	d->TopLayout->setSpacing(0);
+	setLayout(d->TopLayout);
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+	d->createTabBar();
+	d->createButtons();
+
+}
+
+
+//============================================================================
+CDockAreaTitleBar::~CDockAreaTitleBar()
+{
+	delete d;
+}
+
+
+//============================================================================
+CDockAreaTabBar* CDockAreaTitleBar::tabBar() const
+{
+	return d->TabBar;
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::markTabsMenuOutdated()
+{
+	d->MenuOutdated = true;
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::onTabsMenuAboutToShow()
+{
+	if (!d->MenuOutdated)
+	{
+		return;
+	}
+
+	QMenu* menu = d->TabsMenuButton->menu();
+	menu->clear();
+	for (int i = 0; i < d->TabBar->count(); ++i)
+	{
+		if (!d->TabBar->isTabOpen(i))
+		{
+			continue;
+		}
+		auto Tab = d->TabBar->tab(i);
+		QAction* Action = menu->addAction(Tab->icon(), Tab->text());
+		#ifndef QT_NO_TOOLTIP
+		Action->setToolTip(Tab->toolTip());
+		#endif
+		Action->setData(i);
+	}
+
+	d->MenuOutdated = false;
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::onCloseButtonClicked()
+{
+    ADS_PRINT("CDockAreaTitleBar::onCloseButtonClicked");
+	if (d->testConfigFlag(CDockManager::DockAreaCloseButtonClosesTab))
+	{
+		d->TabBar->closeTab(d->TabBar->currentIndex());
+	}
+	else
+	{
+		d->DockArea->closeArea();
+	}
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::onUndockButtonClicked()
+{
+	if (d->DockArea->features().testFlag(CDockWidget::DockWidgetFloatable))
+	{
+		d->TabBar->makeAreaFloating(mapFromGlobal(QCursor::pos()), DraggingInactive);
+	}
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::onTabsMenuActionTriggered(QAction* Action)
+{
+	int Index = Action->data().toInt();
+	d->TabBar->setCurrentIndex(Index);
+	emit tabBarClicked(Index);
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::onCurrentTabChanged(int Index)
+{
+	if (Index < 0)
+	{
+		return;
+	}
+
+	if (d->testConfigFlag(CDockManager::DockAreaCloseButtonClosesTab))
+	{
+		CDockWidget* DockWidget = d->TabBar->tab(Index)->dockWidget();
+		d->CloseButton->setEnabled(DockWidget->features().testFlag(CDockWidget::DockWidgetClosable));
+	}
+}
+
+
+//============================================================================
+QAbstractButton* CDockAreaTitleBar::button(TitleBarButton which) const
+{
+	switch (which)
+	{
+	case TitleBarButtonTabsMenu: return d->TabsMenuButton;
+	case TitleBarButtonUndock: return d->UndockButton;
+	case TitleBarButtonClose: return d->CloseButton;
+	default:
+		return nullptr;
+	}
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::setVisible(bool Visible)
+{
+	Super::setVisible(Visible);
+	markTabsMenuOutdated();
+}
+
+
+//============================================================================
+void CDockAreaTitleBar::showContextMenu(const QPoint& pos)
+{
+	QMenu Menu(this);
+	auto Action = Menu.addAction(tr("Detach Area"), this, SLOT(onUndockButtonClicked()));
+	Action->setEnabled(d->DockArea->features().testFlag(CDockWidget::DockWidgetFloatable));
+	Menu.addSeparator();
+	Action = Menu.addAction(tr("Close Area"), this, SLOT(onCloseButtonClicked()));
+	Action->setEnabled(d->DockArea->features().testFlag(CDockWidget::DockWidgetClosable));
+	Menu.addAction(tr("Close Other Areas"), d->DockArea, SLOT(closeOtherAreas()));
+	Menu.exec(mapToGlobal(pos));
+}
+
+
+} // namespace ads
+
+//---------------------------------------------------------------------------
+// EOF DockAreaTitleBar.cpp

src/DockAreaTitleBar.h

@@ -0,0 +1,112 @@
+#ifndef DockAreaTitleBarH
+#define DockAreaTitleBarH
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   DockAreaTitleBar.h
+/// \author Uwe Kindler
+/// \date   12.10.2018
+/// \brief  Declaration of CDockAreaTitleBar class
+//============================================================================
+
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <QFrame>
+
+#include "ads_globals.h"
+
+class QAbstractButton;
+
+namespace ads
+{
+class CDockAreaTabBar;
+class CDockAreaWidget;
+struct DockAreaTitleBarPrivate;
+
+/**
+ * Title bar of a dock area.
+ * The title bar contains a tabbar with all tabs for a dock widget group and
+ * with a tabs menu button, a undock button and a close button.
+ */
+class ADS_EXPORT CDockAreaTitleBar : public QFrame
+{
+	Q_OBJECT
+private:
+	DockAreaTitleBarPrivate* d; ///< private data (pimpl)
+	friend struct DockAreaTitleBarPrivate;
+
+private slots:
+	void onTabsMenuAboutToShow();
+	void onCloseButtonClicked();
+	void onUndockButtonClicked();
+	void onTabsMenuActionTriggered(QAction* Action);
+	void onCurrentTabChanged(int Index);
+	void showContextMenu(const QPoint& pos);
+
+public slots:
+	/**
+	 * Call this slot to tell the title bar that it should update the tabs menu
+	 * the next time it is shown.
+	 */
+	void markTabsMenuOutdated();
+
+
+public:
+	using Super = QFrame;
+	/**
+	 * Default Constructor
+	 */
+	CDockAreaTitleBar(CDockAreaWidget* parent);
+
+	/**
+	 * Virtual Destructor
+	 */
+	virtual ~CDockAreaTitleBar();
+
+	/**
+	 * Returns the pointer to the tabBar()
+	 */
+	CDockAreaTabBar* tabBar() const;
+
+	/**
+	 * Returns the button corresponding to the given title bar button identifier
+	 */
+	QAbstractButton* button(TitleBarButton which) const;
+
+	/**
+	 * Marks the tabs menu outdated before it calls its base class
+	 * implementation
+	 */
+	virtual void setVisible(bool Visible) override;
+
+
+signals:
+	/**
+	 * This signal is emitted if a tab in the tab bar is clicked by the user
+	 * or if the user clicks on a tab item in the title bar tab menu.
+	 */
+	void tabBarClicked(int index);
+}; // class name
+}
+ // namespace ads
+//-----------------------------------------------------------------------------
+#endif // DockAreaTitleBarH

src/DockAreaWidget.cpp

@@ -1,17 +1,17 @@
 /*******************************************************************************
 ** Qt Advanced Docking System
 ** Copyright (C) 2017 Uwe Kindler
-** 
+**
 ** This library is free software; you can redistribute it and/or
 ** modify it under the terms of the GNU Lesser General Public
 ** License as published by the Free Software Foundation; either
 ** version 2.1 of the License, or (at your option) any later version.
-** 
+**
 ** This library is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 ** Lesser General Public License for more details.
-** 
+**
 ** You should have received a copy of the GNU Lesser General Public
 ** License along with this library; If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
@@ -28,7 +28,7 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include <DockWidgetTab.h>
+#include "DockWidgetTab.h"
 #include "DockAreaWidget.h"
 
 #include <QStackedLayout>
@@ -41,6 +41,8 @@
 #include <QMenu>
 #include <QSplitter>
 #include <QXmlStreamWriter>
+#include <QVector>
+#include <QList>
 
 
 #include "DockContainerWidget.h"
@@ -49,13 +51,187 @@
 #include "DockManager.h"
 #include "DockOverlay.h"
 #include "DockAreaTabBar.h"
+#include "DockSplitter.h"
+#include "DockAreaTitleBar.h"
+
+#include <iostream>
 
 
 namespace ads
 {
 static const char* const INDEX_PROPERTY = "index";
 static const char* const ACTION_PROPERTY = "action";
-static const int APPEND = -1;
+
+/**
+ * Internal dock area layout mimics stack layout but only inserts the current
+ * widget into the internal QLayout object.
+ * \warning Only the current widget has a parent. All other widgets
+ * do not have a parent. That means, a widget that is in this layout may
+ * return nullptr for its parent() function if it is not the current widget.
+ */
+class CDockAreaLayout
+{
+private:
+	QBoxLayout* m_ParentLayout;
+	QList<QWidget*> m_Widgets;
+	int m_CurrentIndex = -1;
+	QWidget* m_CurrentWidget = nullptr;
+
+public:
+	/**
+	 * Creates an instance with the given parent layout
+	 */
+	CDockAreaLayout(QBoxLayout* ParentLayout)
+		: m_ParentLayout(ParentLayout)
+	{
+
+	}
+
+	/**
+	 * Returns the number of widgets in this layout
+	 */
+	int count() const
+	{
+		return m_Widgets.count();
+	}
+
+	/**
+	 * Inserts the widget at the given index position into the internal widget
+	 * list
+	 */
+	void insertWidget(int index, QWidget* Widget)
+	{
+		Widget->setParent(nullptr);
+		if (index < 0)
+		{
+			index = m_Widgets.count();
+		}
+		m_Widgets.insert(index, Widget);
+		if (m_CurrentIndex < 0)
+		{
+			setCurrentIndex(index);
+		}
+		else
+		{
+			if (index <= m_CurrentIndex )
+			{
+				++m_CurrentIndex;
+			}
+		}
+	}
+
+	/**
+	 * Removes the given widget from the layout
+	 */
+	void removeWidget(QWidget* Widget)
+	{
+		if (currentWidget() == Widget)
+		{
+			auto LayoutItem = m_ParentLayout->takeAt(1);
+			if (LayoutItem)
+			{
+				LayoutItem->widget()->setParent(nullptr);
+			}
+			m_CurrentWidget = nullptr;
+			m_CurrentIndex = -1;
+		}
+		m_Widgets.removeOne(Widget);
+	}
+
+	/**
+	 * Returns the current selected widget
+	 */
+	QWidget* currentWidget() const
+	{
+		return m_CurrentWidget;
+	}
+
+	/**
+	 * Activates the widget with the give index.
+	 */
+	void setCurrentIndex(int index)
+	{
+		QWidget *prev = currentWidget();
+		QWidget *next = widget(index);
+		if (!next || (next == prev && !m_CurrentWidget))
+		{
+			return;
+		}
+
+		bool reenableUpdates = false;
+		QWidget *parent = m_ParentLayout->parentWidget();
+
+		if (parent && parent->updatesEnabled())
+		{
+			reenableUpdates = true;
+			parent->setUpdatesEnabled(false);
+		}
+
+		auto LayoutItem = m_ParentLayout->takeAt(1);
+		if (LayoutItem)
+		{
+			LayoutItem->widget()->setParent(nullptr);
+		}
+
+		m_ParentLayout->addWidget(next);
+		if (prev)
+		{
+			prev->hide();
+		}
+		m_CurrentIndex = index;
+		m_CurrentWidget = next;
+
+
+		if (reenableUpdates)
+		{
+			parent->setUpdatesEnabled(true);
+		}
+	}
+
+	/**
+	 * Returns the index of the current active widget
+	 */
+	int currentIndex() const
+	{
+		return m_CurrentIndex;
+	}
+
+	/**
+	 * Returns true if there are no widgets in the layout
+	 */
+	bool isEmpty() const
+	{
+		return m_Widgets.empty();
+	}
+
+	/**
+	 * Returns the index of the given widget
+	 */
+	int indexOf(QWidget* w) const
+	{
+		return m_Widgets.indexOf(w);
+	}
+
+	/**
+	 * Returns the widget for the given index
+	 */
+	QWidget* widget(int index) const
+	{
+		return (index < m_Widgets.size()) ? m_Widgets.at(index) : nullptr;
+	}
+
+	/**
+	 * Returns the geometry of the current active widget
+	 */
+	QRect geometry() const
+	{
+		return m_Widgets.empty() ? QRect() : currentWidget()->geometry();
+	}
+};
+
+
+
+using DockAreaLayout = CDockAreaLayout;
 
 
 /**
@@ -63,18 +239,12 @@ static const int APPEND = -1;
  */
 struct DockAreaWidgetPrivate
 {
-	CDockAreaWidget* _this;
-	QBoxLayout* Layout;
-	QFrame* TitleBar;
-	QBoxLayout* TopLayout;
-	QStackedLayout* ContentsLayout;
-	CDockAreaTabBar* TabBar;
-	QWidget* TabsContainerWidget;
-	QBoxLayout* TabsLayout;
-	QPushButton* TabsMenuButton;
-	QPushButton* CloseButton;
-	int TabsLayoutInitCount;
-	CDockManager* DockManager = nullptr;
+	CDockAreaWidget*	_this			= nullptr;
+	QBoxLayout*			Layout			= nullptr;
+	DockAreaLayout*		ContentsLayout	= nullptr;
+	CDockAreaTitleBar*	TitleBar		= nullptr;
+	CDockManager*		DockManager		= nullptr;
+	bool UpdateTitleBarButtons = false;
 
 	/**
 	 * Private data constructor
@@ -84,7 +254,7 @@ struct DockAreaWidgetPrivate
 	/**
 	 * Creates the layout for top area with tabs and close button
 	 */
-	void createTabBar();
+	void createTitleBar();
 
 	/**
 	 * Returns the dock widget with the given index
@@ -97,18 +267,11 @@ struct DockAreaWidgetPrivate
 	/**
 	 * Convenience function to ease title widget access by index
 	 */
-	CDockWidgetTab* titleWidgetAt(int index)
+	CDockWidgetTab* tabWidgetAt(int index)
 	{
-		return dockWidgetAt(index)->titleBar();
+		return dockWidgetAt(index)->tabWidget();
 	}
 
-	/**
-	 * Adds a tabs menu entry for the given dock widget
-	 * If menu is 0, a menu entry is added to the menu of the TabsMenuButton
-	 * member. If menu is a valid menu pointer, the entry will be added to
-	 * the given menu
-	 */
-	void addTabsMenuEntry(CDockWidget* DockWidget, int Index = -1, QMenu* menu = 0);
 
 	/**
 	 * Returns the tab action of the given dock widget
@@ -127,16 +290,17 @@ struct DockAreaWidgetPrivate
 	}
 
 	/**
-	 * Update the tabs menu if dock widget order changed or if dock widget has
-	 * been removed
+	 * Convenience function for tabbar access
 	 */
-	void updateTabsMenu();
+	CDockAreaTabBar* tabBar() const
+	{
+		return TitleBar->tabBar();
+	}
 
 	/**
-	 * Updates the tab bar visibility depending on the number of dock widgets
-	 * in this area
+	 * Udpates the enable state of the close and detach button
 	 */
-	void updateTabBar();
+	void updateTitleBarButtonStates();
 };
 // struct DockAreaWidgetPrivate
 
@@ -150,102 +314,30 @@ DockAreaWidgetPrivate::DockAreaWidgetPrivate(CDockAreaWidget* _public) :
 
 
 //============================================================================
-void DockAreaWidgetPrivate::createTabBar()
+void DockAreaWidgetPrivate::createTitleBar()
 {
-	TitleBar = new QFrame(_this);
-	TitleBar->setObjectName("dockAreaTitleBar");
-	TopLayout = new QBoxLayout(QBoxLayout::LeftToRight);
-	TopLayout->setContentsMargins(0, 0, 0, 0);
-	TopLayout->setSpacing(0);
-	TitleBar->setLayout(TopLayout);
+	TitleBar = new CDockAreaTitleBar(_this);
 	Layout->addWidget(TitleBar);
-
-	TabBar = new CDockAreaTabBar(_this);
-	TopLayout->addWidget(TabBar, 1);
-
-	TabsContainerWidget = new QWidget();
-	TabsContainerWidget->setObjectName("tabsContainerWidget");
-	TabBar->setWidget(TabsContainerWidget);
-
-	TabsLayout = new QBoxLayout(QBoxLayout::LeftToRight);
-	TabsLayout->setContentsMargins(0, 0, 0, 0);
-	TabsLayout->setSpacing(0);
-	TabsLayout->addStretch(1);
-	TabsContainerWidget->setLayout(TabsLayout);
-
-	TabsMenuButton = new QPushButton();
-	TabsMenuButton->setObjectName("tabsMenuButton");
-	TabsMenuButton->setFlat(true);
-	TabsMenuButton->setIcon(_this->style()->standardIcon(QStyle::SP_TitleBarUnshadeButton));
-	TabsMenuButton->setMaximumWidth(TabsMenuButton->iconSize().width());
-	TabsMenuButton->setMenu(new QMenu(TabsMenuButton));
-	TopLayout->addWidget(TabsMenuButton, 0);
-	TabsMenuButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-	_this->connect(TabsMenuButton->menu(), SIGNAL(triggered(QAction*)),
-		SLOT(onTabsMenuActionTriggered(QAction*)));
-
-	CloseButton = new QPushButton();
-	CloseButton->setObjectName("closeButton");
-	CloseButton->setFlat(true);
-	CloseButton->setIcon(_this->style()->standardIcon(QStyle::SP_TitleBarCloseButton));
-	CloseButton->setToolTip(_this->tr("Close"));
-	CloseButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-	TopLayout->addWidget(CloseButton, 0);
-	_this->connect(CloseButton, SIGNAL(clicked()), SLOT(onCloseButtonClicked()));
-
-	TabsLayoutInitCount = TabsLayout->count();
+	QObject::connect(tabBar(), &CDockAreaTabBar::tabCloseRequested, _this, &CDockAreaWidget::onTabCloseRequested);
+	QObject::connect(TitleBar, &CDockAreaTitleBar::tabBarClicked, _this, &CDockAreaWidget::setCurrentIndex);
+	QObject::connect(tabBar(), &CDockAreaTabBar::tabMoved, _this, &CDockAreaWidget::reorderDockWidget);
 }
 
 
 //============================================================================
-void DockAreaWidgetPrivate::updateTabBar()
+void DockAreaWidgetPrivate::updateTitleBarButtonStates()
 {
-	CDockContainerWidget* Container = _this->dockContainer();
-	if (!Container)
+	if (_this->isHidden())
 	{
+		UpdateTitleBarButtons = true;
 		return;
 	}
 
-	if (Container->isFloating() && (Container->dockAreaCount() == 1) && (_this->count() == 1))
-	{
-		TitleBar->setVisible(false);
-	}
-	else
-	{
-		TitleBar->setVisible(true);
-	}
-}
-
-
-//============================================================================
-void DockAreaWidgetPrivate::addTabsMenuEntry(CDockWidget* DockWidget,
-	int Index, QMenu* menu)
-{
-	menu = menu ? menu : TabsMenuButton->menu();
-	QAction* Action;
-	if (Index >= 0 && Index < menu->actions().count())
-	{
-		Action = new QAction(DockWidget->icon(), DockWidget->windowTitle());
-		menu->insertAction(menu->actions().at(Index), Action);
-	}
-	else
-	{
-		Action = menu->addAction(DockWidget->icon(), DockWidget->windowTitle());
-	}
-	QVariant vAction = QVariant::fromValue(Action);
-	DockWidget->setProperty(ACTION_PROPERTY, vAction);
-}
-
-
-//============================================================================
-void DockAreaWidgetPrivate::updateTabsMenu()
-{
-	QMenu* menu = TabsMenuButton->menu();
-	menu->clear();
-	for (int i = 0; i < ContentsLayout->count(); ++i)
-	{
-		addTabsMenuEntry(dockWidgetAt(i), APPEND, menu);
-	}
+	TitleBar->button(TitleBarButtonClose)->setEnabled(
+		_this->features().testFlag(CDockWidget::DockWidgetClosable));
+	TitleBar->button(TitleBarButtonUndock)->setEnabled(
+		_this->features().testFlag(CDockWidget::DockWidgetFloatable));
+	UpdateTitleBarButtons = false;
 }
 
 
@@ -260,18 +352,15 @@ CDockAreaWidget::CDockAreaWidget(CDockManager* DockManager, CDockContainerWidget
 	d->Layout->setSpacing(0);
 	setLayout(d->Layout);
 
-	d->createTabBar();
-
-	d->ContentsLayout = new QStackedLayout();
-	d->ContentsLayout->setContentsMargins(0, 0, 0, 0);
-	d->ContentsLayout->setSpacing(0);
-	d->Layout->addLayout(d->ContentsLayout, 1);
+	d->createTitleBar();
+	d->ContentsLayout = new DockAreaLayout(d->Layout);
 }
 
 //============================================================================
 CDockAreaWidget::~CDockAreaWidget()
 {
-	qDebug() << "~CDockAreaWidget()";
+    ADS_PRINT("~CDockAreaWidget()");
+	delete d->ContentsLayout;
 	delete d;
 }
 
@@ -286,18 +375,7 @@ CDockManager* CDockAreaWidget::dockManager() const
 //============================================================================
 CDockContainerWidget* CDockAreaWidget::dockContainer() const
 {
-	QWidget* Parent = parentWidget();
-	while (Parent)
-	{
-		CDockContainerWidget* Container = dynamic_cast<CDockContainerWidget*>(Parent);
-		if (Container)
-		{
-			return Container;
-		}
-		Parent = Parent->parentWidget();
-	}
-
-	return 0;
+	return internal::findParent<CDockContainerWidget*>(this);
 }
 
 
@@ -313,83 +391,140 @@ void CDockAreaWidget::insertDockWidget(int index, CDockWidget* DockWidget,
 	bool Activate)
 {
 	d->ContentsLayout->insertWidget(index, DockWidget);
-	DockWidget->titleBar()->setDockAreaWidget(this);
-	auto TitleBar = DockWidget->titleBar();
-	d->TabsLayout->insertWidget(index, TitleBar);
-	TitleBar->show();
-	connect(TitleBar, SIGNAL(clicked()), this, SLOT(onDockWidgetTitleClicked()));
+	DockWidget->tabWidget()->setDockAreaWidget(this);
+	auto TabWidget = DockWidget->tabWidget();
+	// Inserting the tab will change the current index which in turn will
+	// make the tab widget visible in the slot
+	d->tabBar()->blockSignals(true);
+	d->tabBar()->insertTab(index, TabWidget);
+	d->tabBar()->blockSignals(false);
+	TabWidget->setVisible(!DockWidget->isClosed());
 	DockWidget->setProperty(INDEX_PROPERTY, index);
 	if (Activate)
 	{
 		setCurrentIndex(index);
 	}
-	d->addTabsMenuEntry(DockWidget, index);
 	DockWidget->setDockArea(this);
+	d->updateTitleBarButtonStates();
 }
 
 
 //============================================================================
 void CDockAreaWidget::removeDockWidget(CDockWidget* DockWidget)
 {
-	qDebug() << "CDockAreaWidget::removeDockWidget";
-	d->ContentsLayout->removeWidget(DockWidget);
-	auto TitleBar = DockWidget->titleBar();
-	TitleBar->hide();
-	d->TabsLayout->removeWidget(TitleBar);
-	disconnect(TitleBar, SIGNAL(clicked()), this, SLOT(onDockWidgetTitleClicked()));
-	setCurrentIndex(d->ContentsLayout->currentIndex());
-	d->updateTabsMenu();
+    ADS_PRINT("CDockAreaWidget::removeDockWidget");
+	auto NextOpenDockWidget = nextOpenDockWidget(DockWidget);
 
+	d->ContentsLayout->removeWidget(DockWidget);
+	auto TabWidget = DockWidget->tabWidget();
+	TabWidget->hide();
+	d->tabBar()->removeTab(TabWidget);
 	CDockContainerWidget* DockContainer = dockContainer();
-	if (d->ContentsLayout->isEmpty())
+	if (NextOpenDockWidget)
 	{
-		qDebug() << "Dock Area empty";
-		dockContainer()->removeDockArea(this);
-		this->deleteLater();;
+		setCurrentDockWidget(NextOpenDockWidget);
+	}
+	else if (d->ContentsLayout->isEmpty() && DockContainer->dockAreaCount() > 1)
+	{
+        ADS_PRINT("Dock Area empty");
+		DockContainer->removeDockArea(this);
+		this->deleteLater();
+	}
+	else
+	{
+		// if contents layout is not empty but there are no more open dock
+		// widgets, then we need to hide the dock area because it does not
+		// contain any visible content
+		hideAreaWithNoVisibleContent();
 	}
 
-	d->updateTabBar();
-	DockWidget->setDockArea(nullptr);
+	d->updateTitleBarButtonStates();
+	updateTitleBarVisibility();
+	auto TopLevelDockWidget = DockContainer->topLevelDockWidget();
+	if (TopLevelDockWidget)
+	{
+		TopLevelDockWidget->emitTopLevelChanged(true);
+	}
+
+#if (ADS_DEBUG_LEVEL > 0)
 	DockContainer->dumpLayout();
+#endif
 }
 
 
 //============================================================================
-void CDockAreaWidget::onDockWidgetTitleClicked()
+void CDockAreaWidget::hideAreaWithNoVisibleContent()
 {
-	CDockWidgetTab* TitleWidget = qobject_cast<CDockWidgetTab*>(sender());
-	if (!TitleWidget)
+	this->toggleView(false);
+
+	// Hide empty parent splitters
+	auto Splitter = internal::findParent<CDockSplitter*>(this);
+	internal::hideEmptyParentSplitters(Splitter);
+
+	//Hide empty floating widget
+	CDockContainerWidget* Container = this->dockContainer();
+	if (!Container->isFloating())
 	{
 		return;
 	}
 
-	int index = d->TabsLayout->indexOf(TitleWidget);
-	setCurrentIndex(index);
+	updateTitleBarVisibility();
+	auto TopLevelWidget = Container->topLevelDockWidget();
+	auto FloatingWidget = Container->floatingWidget();
+	if (TopLevelWidget)
+	{
+		FloatingWidget->updateWindowTitle();
+		CDockWidget::emitTopLevelEventForWidget(TopLevelWidget, true);
+	}
+	else if (Container->openedDockAreas().isEmpty())
+	{
+		FloatingWidget->hide();
+	}
 }
 
 
 //============================================================================
-void CDockAreaWidget::onCloseButtonClicked()
+void CDockAreaWidget::onTabCloseRequested(int Index)
 {
-	currentDockWidget()->toggleView(false);
+    ADS_PRINT("CDockAreaWidget::onTabCloseRequested " << Index);
+	dockWidget(Index)->toggleView(false);
 }
 
 
 //============================================================================
 CDockWidget* CDockAreaWidget::currentDockWidget() const
 {
-	return dockWidget(currentIndex());
+	int CurrentIndex = currentIndex();
+	if (CurrentIndex < 0)
+	{
+		return nullptr;
+	}
+
+	return dockWidget(CurrentIndex);
 }
 
 
 //============================================================================
 void CDockAreaWidget::setCurrentDockWidget(CDockWidget* DockWidget)
 {
-	int Index = tabIndex(DockWidget);
+	if (dockManager()->isRestoringState())
+	{
+		return;
+	}
+
+	internalSetCurrentDockWidget(DockWidget);
+}
+
+
+//============================================================================
+void CDockAreaWidget::internalSetCurrentDockWidget(CDockWidget* DockWidget)
+{
+	int Index = index(DockWidget);
 	if (Index < 0)
 	{
 		return;
 	}
+
 	setCurrentIndex(Index);
 }
 
@@ -397,43 +532,15 @@ void CDockAreaWidget::setCurrentDockWidget(CDockWidget* DockWidget)
 //============================================================================
 void CDockAreaWidget::setCurrentIndex(int index)
 {
-	if (index < 0 || index > (d->TabsLayout->count() - 1))
+	auto TabBar = d->tabBar();
+	if (index < 0 || index > (TabBar->count() - 1))
 	{
 		qWarning() << Q_FUNC_INFO << "Invalid index" << index;
 		return;
     }
 
     emit currentChanging(index);
-
-	// Set active TAB and update all other tabs to be inactive
-	for (int i = 0; i < d->TabsLayout->count(); ++i)
-	{
-		QLayoutItem* item = d->TabsLayout->itemAt(i);
-		if (!item->widget())
-		{
-			continue;
-		}
-
-		auto TitleWidget = dynamic_cast<CDockWidgetTab*>(item->widget());
-		if (!TitleWidget)
-		{
-			continue;
-		}
-
-		if (i == index)
-		{
-			TitleWidget->show();
-			TitleWidget->setActiveTab(true);
-			d->TabBar->ensureWidgetVisible(TitleWidget);
-			auto Features = TitleWidget->dockWidget()->features();
-			d->CloseButton->setVisible(Features.testFlag(CDockWidget::DockWidgetClosable));
-		}
-		else
-		{
-			TitleWidget->setActiveTab(false);
-		}
-	}
-
+    TabBar->setCurrentIndex(index);
 	d->ContentsLayout->setCurrentIndex(index);
 	d->ContentsLayout->currentWidget()->show();
 	emit currentChanged(index);
@@ -448,9 +555,9 @@ int CDockAreaWidget::currentIndex() const
 
 
 //============================================================================
-QRect CDockAreaWidget::titleAreaGeometry() const
+QRect CDockAreaWidget::titleBarGeometry() const
 {
-	return d->TopLayout->geometry();
+	return d->TitleBar->geometry();
 }
 
 //============================================================================
@@ -461,7 +568,7 @@ QRect CDockAreaWidget::contentAreaGeometry() const
 
 
 //============================================================================
-int CDockAreaWidget::tabIndex(CDockWidget* DockWidget)
+int CDockAreaWidget::index(CDockWidget* DockWidget)
 {
 	return d->ContentsLayout->indexOf(DockWidget);
 }
@@ -479,6 +586,21 @@ QList<CDockWidget*> CDockAreaWidget::dockWidgets() const
 }
 
 
+//============================================================================
+int CDockAreaWidget::openDockWidgetsCount() const
+{
+	int Count = 0;
+	for (int i = 0; i < d->ContentsLayout->count(); ++i)
+	{
+		if (!dockWidget(i)->isClosed())
+		{
+			++Count;
+		}
+	}
+	return Count;
+}
+
+
 //============================================================================
 QList<CDockWidget*> CDockAreaWidget::openedDockWidgets() const
 {
@@ -496,22 +618,22 @@ QList<CDockWidget*> CDockAreaWidget::openedDockWidgets() const
 
 
 //============================================================================
-int CDockAreaWidget::indexOfContentByTitlePos(const QPoint& p, QWidget* exclude) const
+int CDockAreaWidget::indexOfFirstOpenDockWidget() const
 {
 	for (int i = 0; i < d->ContentsLayout->count(); ++i)
 	{
-		auto TitleWidget = d->titleWidgetAt(i);
-		if (TitleWidget->geometry().contains(p) && (!exclude || TitleWidget != exclude))
+		if (!dockWidget(i)->isClosed())
 		{
 			return i;
 		}
 	}
+
 	return -1;
 }
 
 
 //============================================================================
-int CDockAreaWidget::count() const
+int CDockAreaWidget::dockWidgetsCount() const
 {
 	return d->ContentsLayout->count();
 }
@@ -520,70 +642,74 @@ int CDockAreaWidget::count() const
 //============================================================================
 CDockWidget* CDockAreaWidget::dockWidget(int Index) const
 {
-	return dynamic_cast<CDockWidget*>(d->ContentsLayout->widget(Index));
+	return qobject_cast<CDockWidget*>(d->ContentsLayout->widget(Index));
 }
 
 
 //============================================================================
 void CDockAreaWidget::reorderDockWidget(int fromIndex, int toIndex)
 {
+    ADS_PRINT("CDockAreaWidget::reorderDockWidget");
 	if (fromIndex >= d->ContentsLayout->count() || fromIndex < 0
      || toIndex >= d->ContentsLayout->count() || toIndex < 0 || fromIndex == toIndex)
 	{
-		qDebug() << "Invalid index for tab movement" << fromIndex << toIndex;
-		d->TabsLayout->update();
+        ADS_PRINT("Invalid index for tab movement" << fromIndex << toIndex);
 		return;
 	}
 
-	CDockWidget* DockWidget = dockWidget(fromIndex);
-
-	// reorder tabs menu action to match new order of contents
-	auto Menu = d->TabsMenuButton->menu();
-	auto TabsAction = d->dockWidgetTabAction(DockWidget);
-	Menu->removeAction(TabsAction);
-	if (toIndex >= Menu->actions().count())
-	{
-		Menu->addAction(TabsAction);
-	}
-	else
-	{
-		Menu->insertAction(Menu->actions().at(toIndex), TabsAction);
-	}
-
-
-	// now reorder contents and title bars
-	QLayoutItem* liFrom = nullptr;
-	liFrom = d->TabsLayout->takeAt(fromIndex);
-	d->TabsLayout->insertItem(toIndex, liFrom);
-	liFrom = d->ContentsLayout->takeAt(fromIndex);
-	d->ContentsLayout->insertWidget(toIndex, liFrom->widget());
-	delete liFrom;
+	auto Widget = d->ContentsLayout->widget(fromIndex);
+	d->ContentsLayout->removeWidget(Widget);
+	d->ContentsLayout->insertWidget(toIndex, Widget);
+	setCurrentIndex(toIndex);
 }
 
 
 //============================================================================
-void CDockAreaWidget::onTabsMenuActionTriggered(QAction* Action)
+void CDockAreaWidget::toggleDockWidgetView(CDockWidget* DockWidget, bool Open)
 {
-	int Index = d->TabsMenuButton->menu()->actions().indexOf(Action);
-	setCurrentIndex(Index);
+	Q_UNUSED(DockWidget);
+	Q_UNUSED(Open);
+	updateTitleBarVisibility();
 }
 
 
 //============================================================================
-void CDockAreaWidget::updateDockArea()
+void CDockAreaWidget::updateTitleBarVisibility()
 {
-	d->updateTabBar();
+	CDockContainerWidget* Container = dockContainer();
+	if (!Container)
+	{
+		return;
+	}
+
+	if (d->TitleBar)
+	{
+		d->TitleBar->setVisible(!Container->isFloating() || !Container->hasTopLevelDockWidget());
+	}
 }
 
 
+//============================================================================
+void CDockAreaWidget::markTitleBarMenuOutdated()
+{
+	if (d->TitleBar)
+	{
+		d->TitleBar->markTabsMenuOutdated();
+	}
+}
+
+
+
 //============================================================================
 void CDockAreaWidget::saveState(QXmlStreamWriter& s) const
 {
-	s.writeStartElement("DockAreaWidget");
+	s.writeStartElement("Area");
 	s.writeAttribute("Tabs", QString::number(d->ContentsLayout->count()));
-	s.writeAttribute("CurrentIndex", QString::number(d->ContentsLayout->currentIndex()));
-	qDebug() << "CDockAreaWidget::saveState TabCount: " << d->ContentsLayout->count()
-			<< " CurrentIndex: " << d->ContentsLayout->currentIndex();
+	auto CurrentDockWidget = currentDockWidget();
+	QString Name = CurrentDockWidget ? CurrentDockWidget->objectName() : "";
+	s.writeAttribute("Current", Name);
+    ADS_PRINT("CDockAreaWidget::saveState TabCount: " << d->ContentsLayout->count()
+            << " Current: " << Name);
 	for (int i = 0; i < d->ContentsLayout->count(); ++i)
 	{
 		dockWidget(i)->saveState(s);
@@ -591,6 +717,88 @@ void CDockAreaWidget::saveState(QXmlStreamWriter& s) const
 	s.writeEndElement();
 }
 
+
+//============================================================================
+CDockWidget* CDockAreaWidget::nextOpenDockWidget(CDockWidget* DockWidget) const
+{
+	auto OpenDockWidgets = openedDockWidgets();
+	if (OpenDockWidgets.count() > 1 || (OpenDockWidgets.count() == 1 && OpenDockWidgets[0] != DockWidget))
+	{
+		CDockWidget* NextDockWidget;
+		if (OpenDockWidgets.last() == DockWidget)
+		{
+			NextDockWidget = OpenDockWidgets[OpenDockWidgets.count() - 2];
+		}
+		else
+		{
+			int NextIndex = OpenDockWidgets.indexOf(DockWidget) + 1;
+			NextDockWidget = OpenDockWidgets[NextIndex];
+		}
+
+		return NextDockWidget;
+	}
+	else
+	{
+		return nullptr;
+	}
+}
+
+
+//============================================================================
+CDockWidget::DockWidgetFeatures CDockAreaWidget::features() const
+{
+	CDockWidget::DockWidgetFeatures Features(CDockWidget::AllDockWidgetFeatures);
+	for (const auto DockWidget : dockWidgets())
+	{
+		Features &= DockWidget->features();
+	}
+
+	return Features;
+}
+
+
+//============================================================================
+void CDockAreaWidget::toggleView(bool Open)
+{
+	setVisible(Open);
+
+	emit viewToggled(Open);
+}
+
+
+//============================================================================
+void CDockAreaWidget::setVisible(bool Visible)
+{
+	Super::setVisible(Visible);
+	if (d->UpdateTitleBarButtons)
+	{
+		d->updateTitleBarButtonStates();
+	}
+}
+
+
+//============================================================================
+QAbstractButton* CDockAreaWidget::titleBarButton(TitleBarButton which) const
+{
+	return d->TitleBar->button(which);
+}
+
+
+//============================================================================
+void CDockAreaWidget::closeArea()
+{
+	for (auto DockWidget : openedDockWidgets())
+	{
+		DockWidget->toggleView(false);
+	}
+}
+
+
+//============================================================================
+void CDockAreaWidget::closeOtherAreas()
+{
+	dockContainer()->closeOtherAreas(this);
+}
 } // namespace ads
 
 //---------------------------------------------------------------------------

src/DockAreaWidget.h

@@ -33,16 +33,17 @@
 #include <QFrame>
 
 #include "ads_globals.h"
+#include "DockWidget.h"
 
 class QXmlStreamWriter;
+class QAbstractButton;
 
 namespace ads
 {
 struct DockAreaWidgetPrivate;
 class CDockManager;
 class CDockContainerWidget;
-struct DockContainerWidgetPrivate;
-class CDockWidget;
+class DockContainerWidgetPrivate;
 
 
 /**
@@ -59,11 +60,18 @@ private:
 	friend class CDockContainerWidget;
 	friend class DockContainerWidgetPrivate;
 	friend class CDockWidgetTab;
+	friend struct DockWidgetPrivate;
+	friend class CDockWidget;
+	friend struct DockManagerPrivate;
 
 private slots:
-	void onDockWidgetTitleClicked();
-	void onTabsMenuActionTriggered(QAction* Action);
-	void onCloseButtonClicked();
+	void onTabCloseRequested(int Index);
+
+	/**
+	 * Reorder the index position of DockWidget at fromIndx to toIndex
+	 * if a tab in the tabbar is dragged from one index to another one
+	 */
+	void reorderDockWidget(int fromIndex, int toIndex);
 
 protected:
 	/**
@@ -87,18 +95,53 @@ protected:
 	void removeDockWidget(CDockWidget* DockWidget);
 
 	/**
-	 * Returns the index of contents of the title widget that is located at
-	 * mouse position pos
+	 * Called from dock widget if it is opened or closed
 	 */
-	int indexOfContentByTitlePos(const QPoint& pos, QWidget* exclude = nullptr) const;
+	void toggleDockWidgetView(CDockWidget* DockWidget, bool Open);
 
 	/**
-	 * Reorder the index position of DockWidget at fromIndx to toIndex.
+	 * This is a helper function to get the next open dock widget to activate
+	 * if the given DockWidget will be closed or removed.
+	 * The function returns the next widget that should be activated or
+	 * nullptr in case there are no more open widgets in this area.
 	 */
-	void reorderDockWidget(int fromIndex, int toIndex);
+	CDockWidget* nextOpenDockWidget(CDockWidget* DockWidget) const;
 
+	/**
+	 * Returns the index of the given DockWidget in the internal layout
+	 */
+	int index(CDockWidget* DockWidget);
+
+	/**
+	 * Call this function, if you already know, that the dock does not
+	 * contain any visible content (any open dock widgets).
+	 */
+	void hideAreaWithNoVisibleContent();
+
+	/**
+	 * Updates the dock area layout and components visibility
+	 */
+	void updateTitleBarVisibility();
+
+	/**
+	 * This is the internal private function for setting the current widget.
+	 * This function is called by the public setCurrentDockWidget() function
+	 * and by the dock manager when restoring the state
+	 */
+	void internalSetCurrentDockWidget(CDockWidget* DockWidget);
+
+
+	/**
+	 * Marks tabs menu to update
+	 */
+	void markTitleBarMenuOutdated();
+
+protected slots:
+	void toggleView(bool Open);
 
 public:
+	using Super = QFrame;
+
 	/**
 	 * Default Constructor
 	 */
@@ -123,7 +166,7 @@ public:
 	/**
 	 * Returns the rectangle of the title area
 	 */
-	QRect titleAreaGeometry() const;
+	QRect titleBarGeometry() const;
 
 	/**
 	 * Returns the rectangle of the content
@@ -131,9 +174,9 @@ public:
 	QRect contentAreaGeometry() const;
 
 	/**
-	 * Returns the tab index of the given DockWidget
+	 * Returns the number of dock widgets in this area
 	 */
-	int tabIndex(CDockWidget* DockWidget);
+	int dockWidgetsCount() const;
 
 	/**
 	 * Returns a list of all dock widgets in this dock area.
@@ -142,14 +185,14 @@ public:
 	QList<CDockWidget*> dockWidgets() const;
 
 	/**
-	 * Returns a list of dock widgets that are not closed
+	 * Returns the number of open dock widgets in this area
 	 */
-	QList<CDockWidget*> openedDockWidgets() const;
+	int openDockWidgetsCount() const;
 
 	/**
-	 * Returns the number of dock widgets in this area
+	 * Returns a list of dock widgets that are not closed.
 	 */
-	int count() const;
+	QList<CDockWidget*> openedDockWidgets() const;
 
 	/**
 	 * Returns a dock widget by its index
@@ -157,12 +200,25 @@ public:
 	CDockWidget* dockWidget(int Index) const;
 
 	/**
-	 * Returns the index of the current active dock widget
+	 * Returns the index of the current active dock widget or -1 if there
+	 * are is no active dock widget (ie.e if all dock widgets are closed)
 	 */
 	int currentIndex() const;
 
 	/**
-	 * Returns the current active dock widget
+	 * Returns the index of the first open dock widgets in the list of
+	 * dock widgets.
+	 * This function is here for performance reasons. Normally it would
+	 * be possible to take the first dock widget from the list returned by
+	 * openedDockWidgets() function. But that function enumerates all
+	 * dock widgets while this functions stops after the first open dock widget.
+	 * If there are no open dock widgets, the function returns -1.
+	 */
+	int indexOfFirstOpenDockWidget() const;
+
+	/**
+	 * Returns the current active dock widget or a nullptr if there is no
+	 * active dock widget (i.e. if all dock widgets are closed)
 	 */
 	CDockWidget* currentDockWidget() const;
 
@@ -176,16 +232,45 @@ public:
 	 */
 	void saveState(QXmlStreamWriter& Stream) const;
 
+	/**
+	 * This functions returns the dock widget features of all dock widget in
+	 * this area.
+	 * A bitwise and is used to combine the flags of all dock widgets. That
+	 * means, if only one single dock widget does not support a certain flag,
+	 * the whole dock are does not support the flag. I.e. if one single
+	 * dock widget in this area is not closabe, the whole dock are is not
+	 * closable.
+	 */
+	CDockWidget::DockWidgetFeatures features() const;
+
+	/**
+	 * Returns the title bar button corresponding to the given title bar
+	 * button identifier
+	 */
+	QAbstractButton* titleBarButton(TitleBarButton which) const;
+
+	/**
+	 * Update the close button if visibility changed
+	 */
+	virtual void setVisible(bool Visible) override;
+
 public slots:
 	/**
-	 * This sets the index position of the current tab page.
+	 * This activates the tab for the given tab index.
+	 * If the dock widget for the given tab is not visible, the this function
+	 * call will make it visible.
 	 */
 	void setCurrentIndex(int index);
 
 	/**
-	 * Updates the dock area layout and components visibility
+	 * Closes the dock area and all dock widgets in this area
 	 */
-	void updateDockArea();
+	void closeArea();
+
+	/**
+	 * This function closes all other areas except of this area
+	 */
+	void closeOtherAreas();
 
 signals:
 	/**
@@ -206,6 +291,12 @@ signals:
 	 * @param index
 	 */
 	void currentChanged(int index);
+
+	/**
+	 * This signal is emitted if the visibility of this dock area is toggled
+	 * via toggle view function
+	 */
+	void viewToggled(bool Open);
 }; // class DockAreaWidget
 }
  // namespace ads

src/DockContainerWidget.h

@@ -33,14 +33,14 @@
 #include <QFrame>
 
 #include "ads_globals.h"
-
+#include "DockWidget.h"
 
 class QXmlStreamWriter;
 class QXmlStreamReader;
 
 namespace ads
 {
-struct DockContainerWidgetPrivate;
+class DockContainerWidgetPrivate;
 class CDockAreaWidget;
 class CDockWidget;
 class CDockManager;
@@ -50,20 +50,24 @@ struct FloatingDockContainerPrivate;
 
 /**
  * Container that manages a number of dock areas with single dock widgets
- * or tabyfied dock widgets in each area
+ * or tabyfied dock widgets in each area.
+ * Each window that support docking has a DockContainerWidget. That means
+ * the main application window and all floating windows are ore contain
+ * an DockContainerWidget.
  */
 class ADS_EXPORT CDockContainerWidget : public QFrame
 {
 	Q_OBJECT
 private:
 	DockContainerWidgetPrivate* d; ///< private data (pimpl)
-	friend struct DockContainerWidgetPrivate;
+    friend class DockContainerWidgetPrivate;
 	friend class CDockManager;
 	friend struct DockManagerPrivate;
 	friend class CDockAreaWidget;
+	friend struct DockAreaWidgetPrivate;
 	friend class CFloatingDockContainer;
 	friend struct FloatingDockContainerPrivate;
-
+	friend class CDockWidget;
 protected:
 	/**
 	 * Handles activation events to update zOrderIndex
@@ -75,6 +79,11 @@ protected:
 	 */
 	QSplitter* rootSplitter() const;
 
+	/**
+	 * Helper function for creation of the root splitter
+	 */
+	void createRootSplitter();
+
 	/**
 	 * Drop floating widget into the container
 	 */
@@ -103,6 +112,42 @@ protected:
 	 */
 	bool restoreState(QXmlStreamReader& Stream, bool Testing);
 
+	/**
+	 * This function returns the last added dock area widget for the given
+	 * area identifier or 0 if no dock area widget has been added for the given
+	 * area
+	 */
+	CDockAreaWidget* lastAddedDockAreaWidget(DockWidgetArea area) const;
+
+	/**
+	 * This function returns true if this dock area has only one single
+	 * visible dock widget.
+	 * A top level widget is a real floating widget. Only the isFloating()
+	 * function of top level widgets may returns true.
+	 */
+	bool hasTopLevelDockWidget() const;
+
+	/**
+	 * If hasSingleVisibleDockWidget() returns true, this function returns the
+	 * one and only visible dock widget. Otherwise it returns a nullptr.
+	 */
+	CDockWidget* topLevelDockWidget() const;
+
+	/**
+	 * Returns the top level dock area.
+	 */
+	CDockAreaWidget* topLevelDockArea() const;
+
+    /**
+     * This function returns a list of all dock widgets in this floating widget.
+     * It may be possible, depending on the implementation, that dock widgets,
+     * that are not visible to the user have no parent widget. Therefore simply
+     * calling findChildren() would not work here. Therefore this function
+     * iterates over all dock areas and creates a list that contains all
+     * dock widgets returned from all dock areas.
+     */
+    QList<CDockWidget*> dockWidgets() const;
+
 public:
 	/**
 	 * Default Constructor
@@ -124,6 +169,11 @@ public:
 	CDockAreaWidget* addDockWidget(DockWidgetArea area, CDockWidget* Dockwidget,
 		CDockAreaWidget* DockAreaWidget = nullptr);
 
+	/**
+	 * Removes dockwidget
+	 */
+	void removeDockWidget(CDockWidget* Dockwidget);
+
 	/**
 	 * Returns the current zOrderIndex
 	 */
@@ -173,6 +223,27 @@ public:
 	 */
 	void dumpLayout();
 
+	/**
+	 * This functions returns the dock widget features of all dock widget in
+	 * this container.
+	 * A bitwise and is used to combine the flags of all dock widgets. That
+	 * means, if only dock widget does not support a certain flag, the whole
+	 * dock are does not support the flag.
+	 */
+	CDockWidget::DockWidgetFeatures features() const;
+
+	/**
+	 * If this dock container is in a floating widget, this function returns
+	 * the floating widget.
+	 * Else, it returns a nullptr.
+	 */
+	CFloatingDockContainer* floatingWidget() const;
+
+	/**
+	 * Call this function to close all dock areas except the KeepOpenArea
+	 */
+	void closeOtherAreas(CDockAreaWidget* KeepOpenArea);
+
 signals:
 	/**
 	 * This signal is emitted if one or multiple dock areas has been added to
@@ -185,6 +256,12 @@ signals:
 	 * This signal is emitted if one or multiple dock areas has been removed
 	 */
 	void dockAreasRemoved();
+
+	/**
+	 * This signal is emitted if a dock area is opened or closed via
+	 * toggleView() function
+	 */
+	void dockAreaViewToggled(CDockAreaWidget* DockArea, bool Open);
 }; // class DockContainerWidget
 } // namespace ads
 //-----------------------------------------------------------------------------

src/DockManager.cpp

@@ -28,9 +28,10 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include <DockWidgetTab.h>
+#include "DockWidgetTab.h"
 #include "DockManager.h"
 
+#include <algorithm>
 #include <iostream>
 
 #include <QMainWindow>
@@ -39,21 +40,24 @@
 #include <QVariant>
 #include <QDebug>
 #include <QFile>
-#include <QApplication>
 #include <QAction>
 #include <QXmlStreamWriter>
 #include <QXmlStreamReader>
 #include <QSettings>
+#include <QMenu>
+#include <QApplication>
 
 #include "FloatingDockContainer.h"
 #include "DockOverlay.h"
 #include "DockWidget.h"
 #include "ads_globals.h"
-#include "DockStateSerialization.h"
 #include "DockAreaWidget.h"
 
+
 namespace ads
 {
+static CDockManager::ConfigFlags StaticConfigFlags = CDockManager::DefaultConfig;
+
 /**
  * Private data class of CDockManager class (pimpl)
  */
@@ -66,6 +70,10 @@ struct DockManagerPrivate
 	CDockOverlay* DockAreaOverlay;
 	QMap<QString, CDockWidget*> DockWidgetsMap;
 	QMap<QString, QByteArray> Perspectives;
+	QMap<QString, QMenu*> ViewMenuGroups;
+	QMenu* ViewMenu;
+	CDockManager::eViewMenuInsertionOrder MenuInsertionOrder = CDockManager::MenuAlphabeticallySorted;
+	bool RestoringState = false;
 
 	/**
 	 * Private data constructor
@@ -81,7 +89,33 @@ struct DockManagerPrivate
 	/**
 	 * Restores the state
 	 */
-	bool restoreState(const QByteArray &state, int version, bool Testing = internal::Restore);
+	bool restoreStateFromXml(const QByteArray &state, int version, bool Testing = internal::Restore);
+
+	/**
+	 * Restore state
+	 */
+	bool restoreState(const QByteArray &state, int version);
+
+	void restoreDockWidgetsOpenState();
+	void restoreDockAreasIndices();
+	void emitTopLevelEvents();
+
+	void hideFloatingWidgets()
+	{
+		// Hide updates of floating widgets from user
+		for (auto FloatingWidget : FloatingWidgets)
+		{
+			FloatingWidget->hide();
+		}
+	}
+
+	void markDockWidgetsDirty()
+	{
+		for (auto DockWidget : DockWidgetsMap)
+		{
+			DockWidget->setProperty("dirty", true);
+		}
+	}
 
 	/**
 	 * Restores the container with the given index
@@ -92,6 +126,11 @@ struct DockManagerPrivate
 	 * Loads the stylesheet
 	 */
 	void loadStylesheet();
+
+	/**
+	 * Adds action to menu - optionally in sorted order
+	 */
+	void addActionToMenu(QAction* Action, QMenu* Menu, bool InsertSorted);
 };
 // struct DockManagerPrivate
 
@@ -107,7 +146,11 @@ DockManagerPrivate::DockManagerPrivate(CDockManager* _public) :
 void DockManagerPrivate::loadStylesheet()
 {
 	QString Result;
+#ifdef Q_OS_LINUX
+    QFile StyleSheetFile(":ads/stylesheets/default_linux.css");
+#else
 	QFile StyleSheetFile(":ads/stylesheets/default.css");
+#endif
 	StyleSheetFile.open(QIODevice::ReadOnly);
 	QTextStream StyleSheetStream(&StyleSheetFile);
 	Result = StyleSheetStream.readAll();
@@ -124,28 +167,39 @@ bool DockManagerPrivate::restoreContainer(int Index, QXmlStreamReader& stream, b
 		Index = 0;
 	}
 
+	bool Result = false;
 	if (Index >= Containers.count())
 	{
 		CFloatingDockContainer* FloatingWidget = new CFloatingDockContainer(_this);
-		return FloatingWidget->restoreState(stream, Testing);
+		Result = FloatingWidget->restoreState(stream, Testing);
 	}
 	else
 	{
-		qDebug() << "d->Containers[i]->restoreState ";
-		return Containers[Index]->restoreState(stream, Testing);
+        ADS_PRINT("d->Containers[i]->restoreState ");
+		auto Container = Containers[Index];
+		if (Container->isFloating())
+		{
+			Result = Container->floatingWidget()->restoreState(stream, Testing);
+		}
+		else
+		{
+			Result = Container->restoreState(stream, Testing);
+		}
 	}
+
+	return Result;
 }
 
 
 //============================================================================
 bool DockManagerPrivate::checkFormat(const QByteArray &state, int version)
 {
-    return restoreState(state, version, internal::RestoreTesting);
+    return restoreStateFromXml(state, version, internal::RestoreTesting);
 }
 
 
 //============================================================================
-bool DockManagerPrivate::restoreState(const QByteArray &state,  int version,
+bool DockManagerPrivate::restoreStateFromXml(const QByteArray &state,  int version,
 	bool Testing)
 {
     if (state.isEmpty())
@@ -158,7 +212,7 @@ bool DockManagerPrivate::restoreState(const QByteArray &state,  int version,
     {
     	return false;
     }
-    qDebug() << s.attributes().value("Version");
+    ADS_PRINT(s.attributes().value("Version"));
     bool ok;
     int v = s.attributes().value("Version").toInt(&ok);
     if (!ok || v != version)
@@ -167,12 +221,14 @@ bool DockManagerPrivate::restoreState(const QByteArray &state,  int version,
     }
 
     bool Result = true;
-    int  DockContainers = s.attributes().value("DockContainers").toInt();
-    qDebug() << DockContainers;
+#ifdef ADS_DEBUG_PRINT
+    int  DockContainers = s.attributes().value("Containers").toInt();
+#endif
+    ADS_PRINT(DockContainers);
     int DockContainerCount = 0;
     while (s.readNextStartElement())
     {
-    	if (s.name() == "DockContainerWidget")
+    	if (s.name() == "Container")
     	{
     		Result = restoreContainer(DockContainerCount, s, Testing);
 			if (!Result)
@@ -191,6 +247,7 @@ bool DockManagerPrivate::restoreState(const QByteArray &state,  int version,
 		for (int i = 0; i < DeleteCount; ++i)
 		{
 			FloatingWidgets[FloatingWidgetIndex + i]->deleteLater();
+			_this->removeDockContainer(FloatingWidgets[FloatingWidgetIndex + i]->dockContainer());
 		}
     }
 
@@ -198,17 +255,163 @@ bool DockManagerPrivate::restoreState(const QByteArray &state,  int version,
 }
 
 
+//============================================================================
+void DockManagerPrivate::restoreDockWidgetsOpenState()
+{
+    // All dock widgets, that have not been processed in the restore state
+    // function are invisible to the user now and have no assigned dock area
+    // They do not belong to any dock container, until the user toggles the
+    // toggle view action the next time
+    for (auto DockWidget : DockWidgetsMap)
+    {
+    	if (DockWidget->property(internal::DirtyProperty).toBool())
+    	{
+    		DockWidget->flagAsUnassigned();
+            emit DockWidget->viewToggled(false);
+    	}
+    	else
+    	{
+    		DockWidget->toggleViewInternal(!DockWidget->property(internal::ClosedProperty).toBool());
+    	}
+    }
+}
+
+
+//============================================================================
+void DockManagerPrivate::restoreDockAreasIndices()
+{
+    // Now all dock areas are properly restored and we setup the index of
+    // The dock areas because the previous toggleView() action has changed
+    // the dock area index
+    int Count = 0;
+    for (auto DockContainer : Containers)
+    {
+    	Count++;
+    	for (int i = 0; i < DockContainer->dockAreaCount(); ++i)
+    	{
+    		CDockAreaWidget* DockArea = DockContainer->dockArea(i);
+    		QString DockWidgetName = DockArea->property("currentDockWidget").toString();
+    		CDockWidget* DockWidget = nullptr;
+    		if (!DockWidgetName.isEmpty())
+    		{
+    			DockWidget = _this->findDockWidget(DockWidgetName);
+    		}
+
+    		if (!DockWidget || DockWidget->isClosed())
+    		{
+    			int Index = DockArea->indexOfFirstOpenDockWidget();
+    			if (Index < 0)
+    			{
+    				continue;
+    			}
+    			DockArea->setCurrentIndex(Index);
+    		}
+    		else
+    		{
+    			DockArea->internalSetCurrentDockWidget(DockWidget);
+    		}
+    	}
+    }
+}
+
+
+
+//============================================================================
+void DockManagerPrivate::emitTopLevelEvents()
+{
+    // Finally we need to send the topLevelChanged() signals for all dock
+    // widgets if top level changed
+    for (auto DockContainer : Containers)
+    {
+    	CDockWidget* TopLevelDockWidget = DockContainer->topLevelDockWidget();
+    	if (TopLevelDockWidget)
+    	{
+    		TopLevelDockWidget->emitTopLevelChanged(true);
+    	}
+    	else
+    	{
+			for (int i = 0; i < DockContainer->dockAreaCount(); ++i)
+			{
+				auto DockArea = DockContainer->dockArea(i);
+				for (auto DockWidget : DockArea->dockWidgets())
+				{
+					DockWidget->emitTopLevelChanged(false);
+				}
+			}
+    	}
+    }
+}
+
+
+//============================================================================
+bool DockManagerPrivate::restoreState(const QByteArray& State, int version)
+{
+	QByteArray state = State.startsWith("<?xml") ? State : qUncompress(State);
+    if (!checkFormat(state, version))
+    {
+        ADS_PRINT("checkFormat: Error checking format!!!!!!!");
+    	return false;
+    }
+
+    // Hide updates of floating widgets from use
+    hideFloatingWidgets();
+    markDockWidgetsDirty();
+
+    if (!restoreStateFromXml(state, version))
+    {
+        ADS_PRINT("restoreState: Error restoring state!!!!!!!");
+    	return false;
+    }
+
+    restoreDockWidgetsOpenState();
+    restoreDockAreasIndices();
+    emitTopLevelEvents();
+
+    return true;
+}
+
+
+//============================================================================
+void DockManagerPrivate::addActionToMenu(QAction* Action, QMenu* Menu, bool InsertSorted)
+{
+	if (InsertSorted)
+	{
+		auto Actions = Menu->actions();
+		auto it = std::find_if(Actions.begin(), Actions.end(),
+			[&Action](const QAction* a)
+			{
+				return a->text().compare(Action->text(), Qt::CaseInsensitive) > 0;
+			});
+
+		if (it == Actions.end())
+		{
+			Menu->addAction(Action);
+		}
+		else
+		{
+			Menu->insertAction(*it, Action);
+		}
+	}
+	else
+	{
+		Menu->addAction(Action);
+	}
+}
+
+
 //============================================================================
 CDockManager::CDockManager(QWidget *parent) :
 	CDockContainerWidget(this, parent),
 	d(new DockManagerPrivate(this))
 {
+	createRootSplitter();
 	QMainWindow* MainWindow = dynamic_cast<QMainWindow*>(parent);
 	if (MainWindow)
 	{
 		MainWindow->setCentralWidget(this);
 	}
 
+	d->ViewMenu = new QMenu(tr("Show View"), this);
 	d->DockAreaOverlay = new CDockOverlay(this, CDockOverlay::ModeDockAreaOverlay);
 	d->ContainerOverlay = new CDockOverlay(this, CDockOverlay::ModeContainerOverlay);
 	d->Containers.append(this);
@@ -231,7 +434,7 @@ CDockManager::~CDockManager()
 void CDockManager::registerFloatingWidget(CFloatingDockContainer* FloatingWidget)
 {
 	d->FloatingWidgets.append(FloatingWidget);
-	qDebug() << "d->FloatingWidgets.count() " << d->FloatingWidgets.count();
+    ADS_PRINT("d->FloatingWidgets.count() " << d->FloatingWidgets.count());
 }
 
 
@@ -299,11 +502,12 @@ QByteArray CDockManager::saveState(int version) const
 {
     QByteArray xmldata;
     QXmlStreamWriter s(&xmldata);
-	s.setAutoFormatting(true);
+    auto ConfigFlags = CDockManager::configFlags();
+	s.setAutoFormatting(ConfigFlags.testFlag(XmlAutoFormattingEnabled));
     s.writeStartDocument();
 		s.writeStartElement("QtAdvancedDockingSystem");
 		s.writeAttribute("Version", QString::number(version));
-		s.writeAttribute("DockContainers", QString::number(d->Containers.count()));
+		s.writeAttribute("Containers", QString::number(d->Containers.count()));
 		for (auto Container : d->Containers)
 		{
 			Container->saveState(s);
@@ -312,64 +516,45 @@ QByteArray CDockManager::saveState(int version) const
 		s.writeEndElement();
     s.writeEndDocument();
 
-    return xmldata;
+    return ConfigFlags.testFlag(XmlCompressionEnabled)
+    	? qCompress(xmldata, 9) : xmldata;
 }
 
 
 //============================================================================
 bool CDockManager::restoreState(const QByteArray &state, int version)
 {
-    if (!d->checkFormat(state, version))
-    {
-    	qDebug() << "checkFormat: Error checking format!!!!!!!";
-    	return false;
-    }
+	// Prevent multiple calls as long as state is not restore. This may
+	// happen, if QApplication::processEvents() is called somewhere
+	if (d->RestoringState)
+	{
+		return false;
+	}
 
-    for (auto DockWidget : d->DockWidgetsMap)
-    {
-    	DockWidget->setProperty("dirty", true);
-    }
+	// We hide the complete dock manager here. Restoring the state means
+	// that DockWidgets are removed from the DockArea internal stack layout
+	// which in turn  means, that each time a widget is removed the stack
+	// will show and raise the next available widget which in turn
+	// triggers show events for the dock widgets. To avoid this we hide the
+	// dock manager. Because there will be no processing of application
+	// events until this function is finished, the user will not see this
+	// hiding
+	bool IsHidden = this->isHidden();
+	if (!IsHidden)
+	{
+		hide();
+	}
+	d->RestoringState = true;
+	emit restoringState();
+	bool Result = d->restoreState(state, version);
+	d->RestoringState = false;
+	emit stateRestored();
+	if (!IsHidden)
+	{
+		show();
+	}
 
-    if (!d->restoreState(state, version))
-    {
-    	qDebug() << "restoreState: Error restoring state!!!!!!!";
-    	return false;
-    }
-
-    // All dock widgets, that have not been processed in the restore state
-    // function are invisible to the user now and have no assigned dock area
-    // They do not belong to any dock container, until the user toggles the
-    // toggle view action the next time
-    for (auto DockWidget : d->DockWidgetsMap)
-    {
-    	if (DockWidget->property("dirty").toBool())
-    	{
-    		DockWidget->flagAsUnassigned();
-    	}
-    	else
-    	{
-    		DockWidget->toggleView(!DockWidget->property("closed").toBool());
-    	}
-    }
-
-    // Now all dock areas are properly restored and we setup the index of
-    // The dock areas because the previous toggleView() action has changed
-    // the dock area index
-    for (auto DockContainer : d->Containers)
-    {
-    	for (int i = 0; i < DockContainer->dockAreaCount(); ++i)
-    	{
-    		CDockAreaWidget* DockArea = DockContainer->dockArea(i);
-    		int CurrentIndex = DockArea->property("currentIndex").toInt();
-    		if (CurrentIndex < DockArea->count() && DockArea->count() > 1 && CurrentIndex > -1)
-    		{
-    			DockArea->setCurrentIndex(CurrentIndex);
-    		}
-    	}
-    }
-
-    emit stateChanged();
-    return true;
+	return Result;
 }
 
 
@@ -383,11 +568,52 @@ CDockAreaWidget* CDockManager::addDockWidget(DockWidgetArea area,
 
 
 //============================================================================
-CDockWidget* CDockManager::findDockWidget(const QString& ObjectName)
+CDockAreaWidget* CDockManager::addDockWidgetTab(DockWidgetArea area,
+	CDockWidget* Dockwidget)
+{
+	CDockAreaWidget* AreaWidget = lastAddedDockAreaWidget(area);
+	if (AreaWidget)
+	{
+		return addDockWidget(ads::CenterDockWidgetArea, Dockwidget, AreaWidget);
+	}
+	else if (!openedDockAreas().isEmpty())
+	{
+		return addDockWidget(area, Dockwidget, openedDockAreas().last());
+	}
+	else
+	{
+		return addDockWidget(area, Dockwidget, nullptr);
+	}
+}
+
+
+//============================================================================
+CDockAreaWidget* CDockManager::addDockWidgetTabToArea(CDockWidget* Dockwidget,
+	CDockAreaWidget* DockAreaWidget)
+{
+	return addDockWidget(ads::CenterDockWidgetArea, Dockwidget, DockAreaWidget);
+}
+
+
+//============================================================================
+CDockWidget* CDockManager::findDockWidget(const QString& ObjectName) const
 {
 	return d->DockWidgetsMap.value(ObjectName, nullptr);
 }
 
+//============================================================================
+void CDockManager::removeDockWidget(CDockWidget* Dockwidget)
+{
+	d->DockWidgetsMap.remove(Dockwidget->objectName());
+	CDockContainerWidget::removeDockWidget(Dockwidget);
+}
+
+//============================================================================
+QMap<QString, CDockWidget*> CDockManager::dockWidgetsMap() const
+{
+	return d->DockWidgetsMap;
+}
+
 
 //============================================================================
 void CDockManager::addPerspective(const QString& UniquePrespectiveName)
@@ -397,6 +623,30 @@ void CDockManager::addPerspective(const QString& UniquePrespectiveName)
 }
 
 
+//============================================================================
+void CDockManager::removePerspective(const QString& Name)
+{
+	removePerspectives({Name});
+}
+
+
+//============================================================================
+void CDockManager::removePerspectives(const QStringList& Names)
+{
+	int Count = 0;
+	for (auto Name : Names)
+	{
+		Count += d->Perspectives.remove(Name);
+	}
+
+	if (Count)
+	{
+		emit perspectivesRemoved();
+		emit perspectiveListChanged();
+	}
+}
+
+
 //============================================================================
 QStringList CDockManager::perspectiveNames() const
 {
@@ -413,7 +663,9 @@ void CDockManager::openPerspective(const QString& PerspectiveName)
 		return;
 	}
 
+	emit openingPerspective(PerspectiveName);
 	restoreState(Iterator.value());
+	emit perspectiveOpened(PerspectiveName);
 }
 
 
@@ -459,6 +711,83 @@ void CDockManager::loadPerspectives(QSettings& Settings)
 
 	Settings.endArray();
 }
+
+//============================================================================
+QAction* CDockManager::addToggleViewActionToMenu(QAction* ToggleViewAction,
+	const QString& Group, const QIcon& GroupIcon)
+{
+	bool AlphabeticallySorted = (MenuAlphabeticallySorted == d->MenuInsertionOrder);
+	if (!Group.isEmpty())
+	{
+		QMenu* GroupMenu = d->ViewMenuGroups.value(Group, 0);
+		if (!GroupMenu)
+		{
+			GroupMenu = new QMenu(Group, this);
+			GroupMenu->setIcon(GroupIcon);
+			d->addActionToMenu(GroupMenu->menuAction(), d->ViewMenu, AlphabeticallySorted);
+			d->ViewMenuGroups.insert(Group, GroupMenu);
+		}
+
+		d->addActionToMenu(ToggleViewAction, GroupMenu, AlphabeticallySorted);
+		return GroupMenu->menuAction();
+	}
+	else
+	{
+		d->addActionToMenu(ToggleViewAction, d->ViewMenu, AlphabeticallySorted);
+		return ToggleViewAction;
+	}
+}
+
+
+//============================================================================
+QMenu* CDockManager::viewMenu() const
+{
+	return d->ViewMenu;
+}
+
+
+//============================================================================
+void CDockManager::setViewMenuInsertionOrder(eViewMenuInsertionOrder Order)
+{
+	d->MenuInsertionOrder = Order;
+}
+
+
+//===========================================================================
+bool CDockManager::isRestoringState() const
+{
+	return d->RestoringState;
+}
+
+
+//===========================================================================
+int CDockManager::startDragDistance()
+{
+	return QApplication::startDragDistance() * 1.5;
+}
+
+
+//===========================================================================
+CDockManager::ConfigFlags CDockManager::configFlags()
+{
+	return StaticConfigFlags;
+}
+
+
+//===========================================================================
+void CDockManager::setConfigFlags(const ConfigFlags Flags)
+{
+	StaticConfigFlags = Flags;
+}
+
+
+//===========================================================================
+void CDockManager::setConfigFlag(eConfigFlag Flag, bool On)
+{
+	internal::setFlag(StaticConfigFlags, Flag, On);
+}
+
+
 } // namespace ads
 
 //---------------------------------------------------------------------------

src/DockManager.h

@@ -31,10 +31,12 @@
 //                                   INCLUDES
 //============================================================================
 #include "DockContainerWidget.h"
+#include <QIcon>
 
 #include "ads_globals.h"
 
 class QSettings;
+class QMenu;
 
 namespace ads
 {
@@ -49,7 +51,16 @@ struct DockWidgetTabPrivate;
 struct DockAreaWidgetPrivate;
 
 /**
- * The central dock manager that maintains the complete docking system
+ * The central dock manager that maintains the complete docking system.
+ * With the configuration flags you can globally control the functionality
+ * of the docking system. The dock manager uses an internal stylesheet to
+ * style its components like splitters, tabs and buttons. If you want to
+ * disable this stylesheet because your application uses its own,
+ * just call the function for settings the stylesheet with an empty
+ * string.
+ * \code
+ * DockManager->setStyleSheet("");
+ * \endcode
  **/
 class ADS_EXPORT CDockManager : public CDockContainerWidget
 {
@@ -100,10 +111,37 @@ protected:
 	CDockOverlay* dockAreaOverlay() const;
 
 public:
+	enum eViewMenuInsertionOrder
+	{
+		MenuSortedByInsertion,
+		MenuAlphabeticallySorted
+	};
+
+	/**
+	 * These global configuration flags configure some global dock manager
+	 * settings.
+	 */
+	enum eConfigFlag
+	{
+		ActiveTabHasCloseButton = 0x0001,    //!< If this flag is set, the active tab in a tab area has a close button
+		DockAreaHasCloseButton = 0x0002,     //!< If the flag is set each dock area has a close button
+		DockAreaCloseButtonClosesTab = 0x0004,//!< If the flag is set, the dock area close button closes the active tab, if not set, it closes the complete cock area
+		OpaqueSplitterResize = 0x0008, //!< See QSplitter::setOpaqueResize() documentation
+		XmlAutoFormattingEnabled = 0x0010,//!< If enabled, the XML writer automatically adds line-breaks and indentation to empty sections between elements (ignorable whitespace).
+		XmlCompressionEnabled = 0x0020,//!< If enabled, the XML output will be compressed and is not human readable anymore
+		TabCloseButtonIsToolButton = 0x0040,//! If enabled the tab close buttons will be QToolButtons instead of QPushButtons - disabled by default
+		AllTabsHaveCloseButton = 0x0080, //!< if this flag is set, then all tabs that are closable show a close button
+		RetainTabSizeWhenCloseButtonHidden = 0x0100, //!< if this flag is set, the space for the close button is reserved even if the close button is not visible
+		DefaultConfig = ActiveTabHasCloseButton | DockAreaHasCloseButton | OpaqueSplitterResize | XmlCompressionEnabled, ///< the default configuration
+	};
+	Q_DECLARE_FLAGS(ConfigFlags, eConfigFlag)
+
 	/**
 	 * Default Constructor.
 	 * If the given parent is a QMainWindow, the dock manager sets itself as the
-	 * central widget
+	 * central widget.
+	 * Before you create any dock widgets, you should properly setup the
+	 * configuration flags via setConfigFlags().
 	 */
 	CDockManager(QWidget* parent = 0);
 
@@ -112,6 +150,22 @@ public:
 	 */
 	virtual ~CDockManager();
 
+	/**
+	 * This function returns the global configuration flags
+	 */
+	static ConfigFlags configFlags();
+
+	/**
+	 * Sets the global configuration flags for the whole docking system.
+	 * Call this function before you create your first dock widget.
+	 */
+	static void setConfigFlags(const ConfigFlags Flags);
+
+	/**
+	 * Set a certain config flag
+	 */
+	static void setConfigFlag(eConfigFlag Flag, bool On = true);
+
 	/**
 	 * Adds dockwidget into the given area.
 	 * If DockAreaWidget is not null, then the area parameter indicates the area
@@ -128,12 +182,39 @@ public:
 	CDockAreaWidget* addDockWidget(DockWidgetArea area, CDockWidget* Dockwidget,
 		CDockAreaWidget* DockAreaWidget = nullptr);
 
+	/**
+	 * This function will add the given Dockwidget to the given dock area as
+	 * a new tab.
+	 * If no dock area widget exists for the given area identifier, a new
+	 * dock area widget is created.
+	 */
+	CDockAreaWidget* addDockWidgetTab(DockWidgetArea area,
+		CDockWidget* Dockwidget);
+
+	/**
+	 * This function will add the given Dockwidget to the given DockAreaWidget
+	 * as a new tab.
+	 */
+	CDockAreaWidget* addDockWidgetTabToArea(CDockWidget* Dockwidget,
+		CDockAreaWidget* DockAreaWidget);
+
 	/**
 	 * Searches for a registered doc widget with the given ObjectName
 	 * \return Return the found dock widget or nullptr if a dock widget with the
 	 * given name is not registered
 	 */
-	CDockWidget* findDockWidget(const QString& ObjectName);
+	CDockWidget* findDockWidget(const QString& ObjectName) const;
+
+	/**
+	 * Remove the given Dock from the dock manager
+	 */
+	void removeDockWidget(CDockWidget* Dockwidget);
+
+	/**
+	 * This function returns a readable reference to the internal dock
+	 * widgets map so that it is possible to iterate over all dock widgets
+	 */
+	QMap<QString, CDockWidget*> dockWidgetsMap() const;
 
 	/**
 	 * Returns the list of all active and visible dock containers
@@ -154,7 +235,11 @@ public:
 
 	/**
 	 * Saves the current state of the dockmanger and all its dock widgets
-	 * into the returned QByteArray
+	 * into the returned QByteArray.
+	 * The XmlMode enables / disables the auto formatting for the XmlStreamWriter.
+	 * If auto formatting is enabled, the output is intended and line wrapped.
+	 * The XmlMode XmlAutoFormattingDisabled is better if you would like to have
+	 * a more compact XML output - i.e. for storage in ini files.
 	 */
 	QByteArray saveState(int version = 0) const;
 
@@ -177,6 +262,16 @@ public:
 	 */
 	void addPerspective(const QString& UniquePrespectiveName);
 
+	/**
+	 * Removes the perspective with the given name from the list of perspectives
+	 */
+	void removePerspective(const QString& Name);
+
+	/**
+	 * Removes the given perspectives from the dock manager
+	 */
+	void removePerspectives(const QStringList& Names);
+
 	/**
 	 * Returns the names of all available perspectives
 	 */
@@ -192,6 +287,56 @@ public:
 	 */
 	void loadPerspectives(QSettings& Settings);
 
+	/**
+	 * Adds a toggle view action to the the internal view menu.
+	 * You can either manage the insertion of the toggle view actions in your
+	 * application or you can add the actions to the internal view menu and
+	 * then simply insert the menu object into your.
+	 * \param[in] ToggleViewAction The action to insert. If no group is provided
+	 *            the action is directly inserted into the menu. If a group
+	 *            is provided, the action is inserted into the group and the
+	 *            group is inserted into the menu if it is not existing yet.
+	 * \param[in] Group This is the text used for the group menu item
+	 * \param[in] GroupIcon The icon used for grouping the workbenches in the
+	 *            view menu. I.e. if there is a workbench for each device
+	 *            like for spectrometer devices, it is good to group all these
+	 *            workbenches under a menu item
+	 * \return If Group is not empty, this function returns the GroupAction
+	 *         for this group. If the group is empty, the function returns
+	 *         the given ToggleViewAction.
+	 */
+	QAction* addToggleViewActionToMenu(QAction* ToggleViewAction,
+		const QString& Group = QString(), const QIcon& GroupIcon = QIcon());
+
+	/**
+	 * This function returns the internal view menu.
+	 * To fill the view menu, you can use the addToggleViewActionToMenu()
+	 * function.
+	 */
+	QMenu* viewMenu() const;
+
+	/**
+	 * Define the insertion order for toggle view menu items.
+	 * The order defines how the actions are added to the view menu.
+	 * The default insertion order is MenuAlphabeticallySorted to make it
+	 * easier for users to find the menu entry for a certain dock widget.
+	 * You need to call this function befor you insert the first menu item
+	 * into the view menu.
+	 */
+	void setViewMenuInsertionOrder(eViewMenuInsertionOrder Order);
+
+	/**
+	 * This function returns true between the restoringState() and
+	 * stateRestored() signals.
+	 */
+	bool isRestoringState() const;
+
+	/**
+	 * The distance the user needs to move the mouse with the left button
+	 * hold down before a dock widget start floating
+	 */
+	static int startDragDistance();
+
 public slots:
 	/**
 	 * Opens the perspective with the given name.
@@ -204,12 +349,40 @@ signals:
 	 */
 	void perspectiveListChanged();
 
+	/**
+	 * This signal is emitted if perspectives have been removed
+	 */
+	void perspectivesRemoved();
+
+	/**
+	 * This signal is emitted, if the restore function is called, just before
+	 * the dock manager starts restoring the state.
+	 * If this function is called, nothing has changed yet
+	 */
+	void restoringState();
+
     /**
      * This signal is emitted if the state changed in restoreState.
      * The signal is emitted if the restoreState() function is called or
      * if the openPerspective() function is called
      */
-    void stateChanged();
+    void stateRestored();
+
+    /**
+     * This signal is emitted, if the dock manager starts opening a
+     * perspective.
+     * Opening a perspective may take more than a second if there are
+     * many complex widgets. The application may use this signal
+     * to show some progress indicator or to change the mouse cursor
+     * into a busy cursor.
+     */
+    void openingPerspective(const QString& PerspectiveName);
+
+    /**
+     * This signal is emitted if the dock manager finished opening a
+     * perspective
+     */
+    void perspectiveOpened(const QString& PerspectiveName);
 }; // class DockManager
 } // namespace ads
 //-----------------------------------------------------------------------------

src/DockOverlay.cpp

@@ -34,6 +34,7 @@
 #include <QtGlobal>
 #include <QDebug>
 #include <QMap>
+#include <QWindow>
 
 #include "DockAreaWidget.h"
 
@@ -75,6 +76,7 @@ struct DockOverlayCrossPrivate
 	QGridLayout* GridLayout;
 	QColor IconColors[5];
 	bool UpdateRequired = false;
+	double LastDevicePixelRatio = 0.1;
 
 	/**
 	 * Private data constructor
@@ -130,6 +132,21 @@ struct DockOverlayCrossPrivate
 		return Color;
 	}
 
+    //============================================================================
+    /**
+     * Helper function that returns the drop indicator width depending on the
+     * operating system
+     */
+    qreal dropIndicatiorWidth(QLabel* l) const
+    {
+    #ifdef Q_OS_LINUX
+        Q_UNUSED(l)
+        return 40;
+    #else
+        return static_cast<qreal>(l->fontMetrics().height()) * 3.f;
+    #endif
+    }
+
 
 	//============================================================================
 	QWidget* createDropIndicatorWidget(DockWidgetArea DockWidgetArea,
@@ -138,24 +155,41 @@ struct DockOverlayCrossPrivate
 		QLabel* l = new QLabel();
 		l->setObjectName("DockWidgetAreaLabel");
 
-		const qreal metric = static_cast<qreal>(l->fontMetrics().height()) * 3.f;
+        const qreal metric = dropIndicatiorWidth(l);
 		const QSizeF size(metric, metric);
 
-		l->setPixmap(createDropIndicatorPixmap(size, DockWidgetArea, Mode));
+		l->setPixmap(createHighDpiDropIndicatorPixmap(size, DockWidgetArea, Mode));
 		l->setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);
 		l->setAttribute(Qt::WA_TranslucentBackground);
+		l->setProperty("dockWidgetArea", DockWidgetArea);
 		return l;
 	}
 
+	//============================================================================
+	void updateDropIndicatorIcon(QWidget* DropIndicatorWidget)
+	{
+		QLabel* l = qobject_cast<QLabel*>(DropIndicatorWidget);
+        const qreal metric = dropIndicatiorWidth(l);
+		const QSizeF size(metric, metric);
+
+		int Area = l->property("dockWidgetArea").toInt();
+		l->setPixmap(createHighDpiDropIndicatorPixmap(size, (DockWidgetArea)Area, Mode));
+	}
 
 	//============================================================================
-	QPixmap createDropIndicatorPixmap(const QSizeF& size, DockWidgetArea DockWidgetArea,
+	QPixmap createHighDpiDropIndicatorPixmap(const QSizeF& size, DockWidgetArea DockWidgetArea,
 		CDockOverlay::eMode Mode)
 	{
 		QColor borderColor = iconColor(CDockOverlayCross::FrameColor);
 		QColor backgroundColor = iconColor(CDockOverlayCross::WindowBackgroundColor);
 
-		QPixmap pm(size.width(), size.height());
+#if QT_VERSION >= 0x050600
+		double DevicePixelRatio = _this->window()->devicePixelRatioF();
+#else
+        double DevicePixelRatio = _this->window()->devicePixelRatio();
+#endif
+		QSizeF PixmapSize = size * DevicePixelRatio;
+		QPixmap pm(PixmapSize.toSize());
 		pm.fill(QColor(0, 0, 0, 0));
 
 		QPainter p(&pm);
@@ -225,6 +259,7 @@ struct DockOverlayCrossPrivate
 			p.drawRect(areaRect);
 
 			pen = p.pen();
+			pen.setWidth(1);
 			pen.setColor(borderColor);
 			pen.setStyle(Qt::DashLine);
 			p.setPen(pen);
@@ -284,6 +319,7 @@ struct DockOverlayCrossPrivate
 			p.drawPolygon(Arrow);
 		}
 
+		pm.setDevicePixelRatio(DevicePixelRatio);
 		return pm;
 	}
 
@@ -347,7 +383,7 @@ DockWidgetArea CDockOverlay::dropAreaUnderCursor() const
 		return Result;
 	}
 
-	if (DockArea->titleAreaGeometry().contains(DockArea->mapFromGlobal(QCursor::pos())))
+	if (DockArea->titleBarGeometry().contains(DockArea->mapFromGlobal(QCursor::pos())))
 	{
 		return CenterDockWidgetArea;
 	}
@@ -381,6 +417,7 @@ DockWidgetArea CDockOverlay::showOverlay(QWidget* target)
 	move(TopLeft);
 	show();
 	d->Cross->updatePosition();
+	d->Cross->updateOverlayIcons();
 	return dropAreaUnderCursor();
 }
 
@@ -430,9 +467,16 @@ void CDockOverlay::paintEvent(QPaintEvent* event)
 	}
 	QPainter painter(this);
     QColor Color = palette().color(QPalette::Active, QPalette::Highlight);
+    QPen Pen = painter.pen();
+    Pen.setColor(Color.darker(120));
+    Pen.setStyle(Qt::SolidLine);
+    Pen.setWidth(1);
+    Pen.setCosmetic(true);
+    painter.setPen(Pen);
+    Color = Color.lighter(130);
     Color.setAlpha(64);
-    painter.setPen(Qt::NoPen);
-	painter.fillRect(r, Color);
+    painter.setBrush(Color);
+	painter.drawRect(r.adjusted(0, 0, -1, -1));
 	d->DropAreaRect = r;
 }
 
@@ -552,12 +596,36 @@ void CDockOverlayCross::setupOverlayCross(CDockOverlay::eMode Mode)
 	areaWidgets.insert(BottomDockWidgetArea, d->createDropIndicatorWidget(BottomDockWidgetArea, Mode));
 	areaWidgets.insert(LeftDockWidgetArea, d->createDropIndicatorWidget(LeftDockWidgetArea, Mode));
 	areaWidgets.insert(CenterDockWidgetArea, d->createDropIndicatorWidget(CenterDockWidgetArea, Mode));
-
+#if QT_VERSION >= 0x050600
+	d->LastDevicePixelRatio = devicePixelRatioF();
+#else
+    d->LastDevicePixelRatio = devicePixelRatio();
+#endif
 	setAreaWidgets(areaWidgets);
 	d->UpdateRequired = false;
 }
 
 
+//============================================================================
+void CDockOverlayCross::updateOverlayIcons()
+{
+	if (windowHandle()->devicePixelRatio() == d->LastDevicePixelRatio)
+	{
+		return;
+	}
+
+	for (auto Widget : d->DropIndicatorWidgets)
+	{
+		d->updateDropIndicatorIcon(Widget);
+	}
+#if QT_VESION >= 0x050600
+	d->LastDevicePixelRatio = devicePixelRatioF();
+#else
+    d->LastDevicePixelRatio = devicePixelRatio();
+#endif
+}
+
+
 //============================================================================
 void CDockOverlayCross::setIconColor(eIconColor ColorIndex, const QColor& Color)
 {

src/DockOverlay.h

@@ -214,6 +214,11 @@ public:
 	 */
 	void setupOverlayCross(CDockOverlay::eMode Mode);
 
+	/**
+	 * Recreates the overlay icons.
+	 */
+	void updateOverlayIcons();
+
 	/**
 	 * Resets and updates the
 	 */
@@ -240,9 +245,6 @@ public:
 protected:
 	virtual void showEvent(QShowEvent* e) override;
 	void setAreaWidgets(const QHash<DockWidgetArea, QWidget*>& widgets);
-
-private:
-
 }; // CDockOverlayCross
 
 } // namespace ads

src/DockSplitter.cpp

@@ -52,7 +52,8 @@ CDockSplitter::CDockSplitter(QWidget *parent)
 	: QSplitter(parent),
 	  d(new DockSplitterPrivate(this))
 {
-
+	setProperty("ads-splitter", true);
+	setChildrenCollapsible(false);
 }
 
 
@@ -67,7 +68,7 @@ CDockSplitter::CDockSplitter(Qt::Orientation orientation, QWidget *parent)
 //============================================================================
 CDockSplitter::~CDockSplitter()
 {
-	qDebug() << "~CDockSplitter";
+    ADS_PRINT("~CDockSplitter");
 	delete d;
 }
 
@@ -78,7 +79,7 @@ bool CDockSplitter::hasVisibleContent() const
 	// TODO Cache or precalculate this to speed up
 	for (int i = 0; i < count(); ++i)
 	{
-		if (widget(i)->isVisibleTo(this))
+		if (!widget(i)->isHidden())
 		{
 			return true;
 		}

src/DockSplitter.h

@@ -38,7 +38,8 @@ namespace ads
 struct DockSplitterPrivate;
 
 /**
- * Splitter used internally instead of QSplitter
+ * Splitter used internally instead of QSplitter with some additional
+ * fuctionality.
  */
 class ADS_EXPORT CDockSplitter : public QSplitter
 {

src/DockStateSerialization.cpp

@@ -1,32 +0,0 @@
-/*******************************************************************************
-** Qt Advanced Docking System
-** Copyright (C) 2017 Uwe Kindler
-** 
-** This library is free software; you can redistribute it and/or
-** modify it under the terms of the GNU Lesser General Public
-** License as published by the Free Software Foundation; either
-** version 2.1 of the License, or (at your option) any later version.
-** 
-** This library is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-** Lesser General Public License for more details.
-** 
-** You should have received a copy of the GNU Lesser General Public
-** License along with this library; If not, see <http://www.gnu.org/licenses/>.
-******************************************************************************/
-
-
-//============================================================================
-/// \file   DockStateSerialization.cpp
-/// \author Uwe Kindler
-/// \date   26.02.2017
-/// \brief  Serialization related data, constants and stuff
-//============================================================================
-
-
-//============================================================================
-//                                   INCLUDES
-//============================================================================
-#include "DockStateSerialization.h"
-

src/DockStateSerialization.h

@@ -1,55 +0,0 @@
-#ifndef DockStateSerializationH
-#define DockStateSerializationH
-/*******************************************************************************
-** Qt Advanced Docking System
-** Copyright (C) 2017 Uwe Kindler
-** 
-** This library is free software; you can redistribute it and/or
-** modify it under the terms of the GNU Lesser General Public
-** License as published by the Free Software Foundation; either
-** version 2.1 of the License, or (at your option) any later version.
-** 
-** This library is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-** Lesser General Public License for more details.
-** 
-** You should have received a copy of the GNU Lesser General Public
-** License along with this library; If not, see <http://www.gnu.org/licenses/>.
-******************************************************************************/
-
-
-//============================================================================
-/// \file   DockStateSerialization.h
-/// \author Uwe Kindler
-/// \date   26.02.2017
-/// \brief  Declaration of serialization related data, constants and stuff
-//============================================================================
-
-
-//============================================================================
-//                                   INCLUDES
-//============================================================================
-
-
-namespace ads
-{
-
-namespace internal
-{
-// sentinel values used to validate state data
-enum VersionMarkers
-{
-	VersionMarker = 0xff,
-	ContainerMarker = 0xfe,
-	SplitterMarker = 0xfd,
-	DockAreaMarker = 0xfc,
-	DockWidgetMarker = 0xfb
-};
-
-static const bool RestoreTesting = true;
-static const bool Restore = false;
-} // internal
-} // namespace ads
-//-----------------------------------------------------------------------------
-#endif // DockManagerH

src/DockWidget.cpp

@@ -28,27 +28,29 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include <DockWidgetTab.h>
+#include "DockWidgetTab.h"
 #include "DockWidget.h"
 
 #include <QBoxLayout>
 #include <QAction>
 #include <QSplitter>
 #include <QStack>
+#include <QScrollArea>
 #include <QTextStream>
 #include <QPointer>
 #include <QEvent>
 #include <QDebug>
+#include <QToolBar>
 #include <QXmlStreamWriter>
 
 #include "DockContainerWidget.h"
 #include "DockAreaWidget.h"
 #include "DockManager.h"
 #include "FloatingDockContainer.h"
-#include "DockStateSerialization.h"
 #include "DockSplitter.h"
 #include "ads_globals.h"
 
+
 namespace ads
 {
 /**
@@ -56,15 +58,22 @@ namespace ads
  */
 struct DockWidgetPrivate
 {
-	CDockWidget* _this;
-	QBoxLayout* Layout;
+	CDockWidget* _this = nullptr;
+	QBoxLayout* Layout = nullptr;
 	QWidget* Widget = nullptr;
-	CDockWidgetTab* TitleWidget;
+	CDockWidgetTab* TabWidget = nullptr;
 	CDockWidget::DockWidgetFeatures Features = CDockWidget::AllDockWidgetFeatures;
 	CDockManager* DockManager = nullptr;
 	CDockAreaWidget* DockArea = nullptr;
-	QAction* ToggleViewAction;
+	QAction* ToggleViewAction = nullptr;
 	bool Closed = false;
+	QScrollArea* ScrollArea = nullptr;
+	QToolBar* ToolBar = nullptr;
+	Qt::ToolButtonStyle ToolBarStyleDocked = Qt::ToolButtonIconOnly;
+	Qt::ToolButtonStyle ToolBarStyleFloating = Qt::ToolButtonTextUnderIcon;
+	QSize ToolBarIconSizeDocked = QSize(16, 16);
+	QSize ToolBarIconSizeFloating = QSize(24, 24);
+	bool IsFloatingTopLevel = false;
 
 	/**
 	 * Private data constructor
@@ -82,20 +91,21 @@ struct DockWidgetPrivate
 	void hideDockWidget();
 
 	/**
-	 * Hides a parent splitter if all dock widgets in the splitter are closed
+	 * Hides a dock area if all dock widgets in the area are closed.
+	 * This function updates the current selected tab and hides the parent
+	 * dock area if it is empty
 	 */
-	void hideEmptyParentSplitters();
+	void updateParentDockArea();
 
 	/**
-	 * Hides a dock area if all dock widgets in the area are closed
+	 * Setup the top tool bar
 	 */
-	void hideEmptyParentDockArea();
+	void setupToolBar();
 
 	/**
-	 * Hides a floating widget if all dock areas are empty - that means,
-	 * if all dock widgets in all dock areas are closed
+	 * Setup the main scroll area
 	 */
-	void hideEmptyFloatingWidget();
+	void setupScrollArea();
 };
 // struct DockWidgetPrivate
 
@@ -118,9 +128,10 @@ void DockWidgetPrivate::showDockWidget()
 	}
 	else
 	{
-		DockArea->show();
-		DockArea->setCurrentIndex(DockArea->tabIndex(_this));
-		QSplitter* Splitter = internal::findParent<QSplitter*>(_this);
+		DockArea->toggleView(true);
+		DockArea->setCurrentDockWidget(_this);
+		TabWidget->show();
+		QSplitter* Splitter = internal::findParent<QSplitter*>(DockArea);
 		while (Splitter && !Splitter->isVisible())
 		{
 			Splitter->show();
@@ -141,63 +152,52 @@ void DockWidgetPrivate::showDockWidget()
 //============================================================================
 void DockWidgetPrivate::hideDockWidget()
 {
-	TitleWidget->hide();
-	hideEmptyParentDockArea();
-	hideEmptyParentSplitters();
-	hideEmptyFloatingWidget();
+	TabWidget->hide();
+	updateParentDockArea();
 }
 
 
 //============================================================================
-void DockWidgetPrivate::hideEmptyParentSplitters()
+void DockWidgetPrivate::updateParentDockArea()
 {
-	auto Splitter = internal::findParent<CDockSplitter*>(_this);
-	while (Splitter && Splitter->isVisible())
+	if (!DockArea)
 	{
-		if (!Splitter->hasVisibleContent())
-		{
-			Splitter->hide();
-		}
-		Splitter = internal::findParent<CDockSplitter*>(Splitter);
+		return;
 	}
-}
 
-
-//============================================================================
-void DockWidgetPrivate::hideEmptyParentDockArea()
-{
-	auto OpenDockWidgets = DockArea->openedDockWidgets();
-	if (OpenDockWidgets.count() > 1)
+	auto NextDockWidget = DockArea->nextOpenDockWidget(_this);
+	if (NextDockWidget)
 	{
-		CDockWidget* NextDockWidget;
-		if (OpenDockWidgets.last() == _this)
-		{
-			NextDockWidget = OpenDockWidgets[OpenDockWidgets.count() - 2];
-		}
-		else
-		{
-			int NextIndex = OpenDockWidgets.indexOf(_this) + 1;
-			NextDockWidget = OpenDockWidgets[NextIndex];
-		}
-
 		DockArea->setCurrentDockWidget(NextDockWidget);
 	}
 	else
 	{
-		DockArea->hide();
+		DockArea->hideAreaWithNoVisibleContent();
 	}
 }
 
 
 //============================================================================
-void DockWidgetPrivate::hideEmptyFloatingWidget()
+void DockWidgetPrivate::setupToolBar()
 {
-	CDockContainerWidget* Container = _this->dockContainer();
-	if (Container->isFloating() && Container->openedDockAreas().isEmpty())
-	{
-		CFloatingDockContainer* FloatingWidget = internal::findParent<CFloatingDockContainer*>(Container);
-		FloatingWidget->hide();
-	}
+	ToolBar = new QToolBar(_this);
+	ToolBar->setObjectName("dockWidgetToolBar");
+	Layout->insertWidget(0, ToolBar);
+	ToolBar->setIconSize(QSize(16, 16));
+	ToolBar->toggleViewAction()->setEnabled(false);
+	ToolBar->toggleViewAction()->setVisible(false);
+	_this->connect(_this, SIGNAL(topLevelChanged(bool)), SLOT(setToolbarFloatingStyle(bool)));
+}
+
+
+
+//============================================================================
+void DockWidgetPrivate::setupScrollArea()
+{
+	ScrollArea = new QScrollArea(_this);
+	ScrollArea->setObjectName("dockWidgetScrollArea");
+	ScrollArea->setWidgetResizable(true);
+	Layout->addWidget(ScrollArea);
 }
 
 
@@ -213,17 +213,18 @@ CDockWidget::CDockWidget(const QString &title, QWidget *parent) :
 	setWindowTitle(title);
 	setObjectName(title);
 
-	d->TitleWidget = new CDockWidgetTab(this);
-	d->ToggleViewAction = new QAction(title);
+	d->TabWidget = new CDockWidgetTab(this);
+    d->ToggleViewAction = new QAction(title, this);
 	d->ToggleViewAction->setCheckable(true);
 	connect(d->ToggleViewAction, SIGNAL(triggered(bool)), this,
 		SLOT(toggleView(bool)));
+	setToolbarFloatingStyle(false);
 }
 
 //============================================================================
 CDockWidget::~CDockWidget()
 {
-	qDebug() << "~CDockWidget()";
+    ADS_PRINT("~CDockWidget()");
 	delete d;
 }
 
@@ -239,18 +240,35 @@ void CDockWidget::setToggleViewActionChecked(bool Checked)
 
 
 //============================================================================
-void CDockWidget::setWidget(QWidget* widget)
+void CDockWidget::setWidget(QWidget* widget, eInsertMode InsertMode)
 {
-	if (d->Widget)
+	QScrollArea* ScrollAreaWidget = qobject_cast<QScrollArea*>(widget);
+	if (ScrollAreaWidget || ForceNoScrollArea == InsertMode)
 	{
-		d->Layout->replaceWidget(d->Widget, widget);
+		d->Layout->addWidget(widget);
+		if (ScrollAreaWidget && ScrollAreaWidget->viewport())
+		{
+			ScrollAreaWidget->viewport()->setProperty("dockWidgetContent", true);
+		}
 	}
 	else
 	{
-		d->Layout->addWidget(widget);
+		d->setupScrollArea();
+		d->ScrollArea->setWidget(widget);
 	}
 
 	d->Widget = widget;
+	d->Widget->setProperty("dockWidgetContent", true);
+}
+
+
+//============================================================================
+QWidget* CDockWidget::takeWidget()
+{
+	d->ScrollArea->takeWidget();
+	d->Layout->removeWidget(d->Widget);
+	d->Widget->setParent(nullptr);
+    return d->Widget;
 }
 
 
@@ -262,23 +280,30 @@ QWidget* CDockWidget::widget() const
 
 
 //============================================================================
-CDockWidgetTab* CDockWidget::titleBar() const
+CDockWidgetTab* CDockWidget::tabWidget() const
 {
-	return d->TitleWidget;
+	return d->TabWidget;
 }
 
 
 //============================================================================
 void CDockWidget::setFeatures(DockWidgetFeatures features)
 {
+	if (d->Features == features)
+	{
+		return;
+	}
 	d->Features = features;
+	d->TabWidget->onDockWidgetFeaturesChanged();
 }
 
 
 //============================================================================
 void CDockWidget::setFeature(DockWidgetFeature flag, bool on)
 {
-	d->Features.setFlag(flag, on);
+	auto Features = features();
+    internal::setFlag(Features, flag, on);
+    setFeatures(Features);
 }
 
 
@@ -306,21 +331,51 @@ void CDockWidget::setDockManager(CDockManager* DockManager)
 //============================================================================
 CDockContainerWidget* CDockWidget::dockContainer() const
 {
-	return internal::findParent<CDockContainerWidget*>(this);
+	if (d->DockArea)
+	{
+		return d->DockArea->dockContainer();
+	}
+	else
+	{
+		return 0;
+	}
 }
 
 
 //============================================================================
 CDockAreaWidget* CDockWidget::dockAreaWidget() const
 {
-	return internal::findParent<CDockAreaWidget*>(this);
+	return d->DockArea;
 }
 
 
 //============================================================================
 bool CDockWidget::isFloating() const
 {
-	return dockContainer() ? dockContainer()->isFloating() : false;
+	if (!isInFloatingContainer())
+	{
+		return false;
+	}
+
+	return dockContainer()->topLevelDockWidget() == this;
+}
+
+
+//============================================================================
+bool CDockWidget::isInFloatingContainer() const
+{
+	auto Container = dockContainer();
+	if (!Container)
+	{
+		return false;
+	}
+
+	if (!Container->isFloating())
+	{
+		return false;
+	}
+
+	return true;
 }
 
 
@@ -349,7 +404,7 @@ void CDockWidget::setToggleViewActionMode(eToggleViewActionMode Mode)
 	else
 	{
 		d->ToggleViewAction->setCheckable(false);
-		d->ToggleViewAction->setIcon(d->TitleWidget->icon());
+		d->ToggleViewAction->setIcon(d->TabWidget->icon());
 	}
 }
 
@@ -357,11 +412,33 @@ void CDockWidget::setToggleViewActionMode(eToggleViewActionMode Mode)
 //============================================================================
 void CDockWidget::toggleView(bool Open)
 {
+	// If the toggle view action mode is ActionModeShow, then Open is always
+	// true if the sender is the toggle view action
 	QAction* Sender = qobject_cast<QAction*>(sender());
 	if (Sender == d->ToggleViewAction && !d->ToggleViewAction->isCheckable())
 	{
 		Open = true;
 	}
+	// If the dock widget state is different, then we really need to toggle
+	// the state. If we are in the right state, then we simply make this
+	// dock widget the current dock widget
+	if (d->Closed != !Open)
+	{
+		toggleViewInternal(Open);
+	}
+	else if (Open && d->DockArea)
+	{
+		d->DockArea->setCurrentDockWidget(this);
+	}
+}
+
+
+//============================================================================
+void CDockWidget::toggleViewInternal(bool Open)
+{
+	CDockContainerWidget* DockContainer = dockContainer();
+	CDockWidget* TopLevelDockWidgetBefore = DockContainer
+		? DockContainer->topLevelDockWidget() : nullptr;
 
 	if (Open)
 	{
@@ -375,6 +452,29 @@ void CDockWidget::toggleView(bool Open)
 	d->ToggleViewAction->blockSignals(true);
 	d->ToggleViewAction->setChecked(Open);
 	d->ToggleViewAction->blockSignals(false);
+	if (d->DockArea)
+	{
+		d->DockArea->toggleDockWidgetView(this, Open);
+	}
+
+	if (Open && TopLevelDockWidgetBefore)
+	{
+		CDockWidget::emitTopLevelEventForWidget(TopLevelDockWidgetBefore, false);
+	}
+
+	// Here we need to call the dockContainer() function again, because if
+	// this dock widget was unassigned before the call to showDockWidget() then
+	// it has a dock container now
+	DockContainer = dockContainer();
+	CDockWidget* TopLevelDockWidgetAfter = DockContainer
+		? DockContainer->topLevelDockWidget() : nullptr;
+	CDockWidget::emitTopLevelEventForWidget(TopLevelDockWidgetAfter, true);
+	CFloatingDockContainer* FloatingContainer = DockContainer->floatingWidget();
+	if (FloatingContainer)
+	{
+		FloatingContainer->updateWindowTitle();
+	}
+
 	if (!Open)
 	{
 		emit closed();
@@ -387,15 +487,15 @@ void CDockWidget::toggleView(bool Open)
 void CDockWidget::setDockArea(CDockAreaWidget* DockArea)
 {
 	d->DockArea = DockArea;
-	d->ToggleViewAction->setChecked(DockArea != nullptr);
+	d->ToggleViewAction->setChecked(DockArea != nullptr && !this->isClosed());
 }
 
 
 //============================================================================
 void CDockWidget::saveState(QXmlStreamWriter& s) const
 {
-	s.writeStartElement("DockWidget");
-	s.writeAttribute("ObjectName", objectName());
+	s.writeStartElement("Widget");
+	s.writeAttribute("Name", objectName());
 	s.writeAttribute("Closed", QString::number(d->Closed ? 1 : 0));
 	s.writeEndElement();
 }
@@ -404,9 +504,11 @@ void CDockWidget::saveState(QXmlStreamWriter& s) const
 //============================================================================
 void CDockWidget::flagAsUnassigned()
 {
+	d->Closed = true;
 	setParent(d->DockManager);
+	setVisible(false);
 	setDockArea(nullptr);
-	titleBar()->setParent(this);
+	tabWidget()->setParent(this);
 }
 
 
@@ -415,16 +517,49 @@ bool CDockWidget::event(QEvent *e)
 {
 	if (e->type() == QEvent::WindowTitleChange)
 	{
-		emit titleChanged(windowTitle());
+		const auto title = windowTitle();
+		if (d->TabWidget)
+		{
+			d->TabWidget->setText(title);
+		}
+		if (d->ToggleViewAction)
+		{
+			d->ToggleViewAction->setText(title);
+		}
+		if (d->DockArea)
+		{
+			d->DockArea->markTitleBarMenuOutdated();//update tabs menu
+		}
+		emit titleChanged(title);
 	}
-	return QFrame::event(e);
+	return Super::event(e);
 }
 
 
+#ifndef QT_NO_TOOLTIP
+//============================================================================
+void CDockWidget::setTabToolTip(const QString &text)
+{
+	if (d->TabWidget)
+	{
+		d->TabWidget->setToolTip(text);
+	}
+	if (d->ToggleViewAction)
+	{
+		d->ToggleViewAction->setToolTip(text);
+	}
+	if (d->DockArea)
+	{
+		d->DockArea->markTitleBarMenuOutdated();//update tabs menu
+	}
+}
+#endif
+
+
 //============================================================================
 void CDockWidget::setIcon(const QIcon& Icon)
 {
-	d->TitleWidget->setIcon(Icon);
+	d->TabWidget->setIcon(Icon);
 	if (!d->ToggleViewAction->isCheckable())
 	{
 		d->ToggleViewAction->setIcon(Icon);
@@ -435,10 +570,161 @@ void CDockWidget::setIcon(const QIcon& Icon)
 //============================================================================
 QIcon CDockWidget::icon() const
 {
-	return d->TitleWidget->icon();
+	return d->TabWidget->icon();
 }
 
 
+//============================================================================
+QToolBar* CDockWidget::toolBar() const
+{
+	return d->ToolBar;
+}
+
+
+//============================================================================
+QToolBar* CDockWidget::createDefaultToolBar()
+{
+	if (!d->ToolBar)
+	{
+		d->setupToolBar();
+	}
+
+	return d->ToolBar;
+}
+
+
+//============================================================================
+void CDockWidget::setToolBar(QToolBar* ToolBar)
+{
+	if (d->ToolBar)
+	{
+		delete d->ToolBar;
+	}
+
+	d->ToolBar = ToolBar;
+	d->Layout->insertWidget(0, d->ToolBar);
+	this->connect(this, SIGNAL(topLevelChanged(bool)), SLOT(setToolbarFloatingStyle(bool)));
+	setToolbarFloatingStyle(isFloating());
+}
+
+
+//============================================================================
+void CDockWidget::setToolBarStyle(Qt::ToolButtonStyle Style, eState State)
+{
+	if (StateFloating == State)
+	{
+		d->ToolBarStyleFloating = Style;
+	}
+	else
+	{
+		d->ToolBarStyleDocked = Style;
+	}
+
+	setToolbarFloatingStyle(isFloating());
+}
+
+
+//============================================================================
+Qt::ToolButtonStyle CDockWidget::toolBarStyle(eState State) const
+{
+	if (StateFloating == State)
+	{
+		return d->ToolBarStyleFloating;
+	}
+	else
+	{
+		return d->ToolBarStyleDocked;
+	}
+}
+
+
+//============================================================================
+void CDockWidget::setToolBarIconSize(const QSize& IconSize, eState State)
+{
+	if (StateFloating == State)
+	{
+		d->ToolBarIconSizeFloating = IconSize;
+	}
+	else
+	{
+		d->ToolBarIconSizeDocked = IconSize;
+	}
+
+	setToolbarFloatingStyle(isFloating());
+}
+
+
+//============================================================================
+QSize CDockWidget::toolBarIconSize(eState State) const
+{
+	if (StateFloating == State)
+	{
+		return d->ToolBarIconSizeFloating;
+	}
+	else
+	{
+		return d->ToolBarIconSizeDocked;
+	}
+}
+
+
+//============================================================================
+void CDockWidget::setToolbarFloatingStyle(bool Floating)
+{
+	if (!d->ToolBar)
+	{
+		return;
+	}
+
+	auto IconSize = Floating ? d->ToolBarIconSizeFloating : d->ToolBarIconSizeDocked;
+	if (IconSize != d->ToolBar->iconSize())
+	{
+		d->ToolBar->setIconSize(IconSize);
+	}
+
+	auto ButtonStyle = Floating ? d->ToolBarStyleFloating : d->ToolBarStyleDocked;
+	if (ButtonStyle != d->ToolBar->toolButtonStyle())
+	{
+		d->ToolBar->setToolButtonStyle(ButtonStyle);
+	}
+}
+
+
+//============================================================================
+void CDockWidget::emitTopLevelEventForWidget(CDockWidget* TopLevelDockWidget, bool Floating)
+{
+	if (TopLevelDockWidget)
+	{
+		TopLevelDockWidget->dockAreaWidget()->updateTitleBarVisibility();
+		TopLevelDockWidget->emitTopLevelChanged(Floating);
+	}
+}
+
+
+//============================================================================
+void CDockWidget::emitTopLevelChanged(bool Floating)
+{
+	if (Floating != d->IsFloatingTopLevel)
+	{
+		d->IsFloatingTopLevel = Floating;
+		emit topLevelChanged(d->IsFloatingTopLevel);
+	}
+}
+
+
+//============================================================================
+void CDockWidget::setClosedState(bool Closed)
+{
+	d->Closed = Closed;
+}
+
+
+//============================================================================
+QSize CDockWidget::minimumSizeHint() const
+{
+	return QSize(60, 40);
+}
+
 
 } // namespace ads
 

src/DockWidget.h

@@ -34,6 +34,7 @@
 
 #include "ads_globals.h"
 
+class QToolBar;
 class QXmlStreamWriter;
 
 namespace ads
@@ -43,7 +44,8 @@ class CDockWidgetTab;
 class CDockManager;
 class CDockContainerWidget;
 class CDockAreaWidget;
-struct DockContainerWidgetPrivate;
+class DockContainerWidgetPrivate;
+class CFloatingDockContainer;
 
 /**
  * The QDockWidget class provides a widget that can be docked inside a
@@ -56,12 +58,22 @@ private:
 	DockWidgetPrivate* d; ///< private data (pimpl)
 	friend struct DockWidgetPrivate;
 
+private slots:
+	/**
+	 * Adjusts the toolbar icon sizes according to the floating state
+	 */
+	void setToolbarFloatingStyle(bool topLevel);
+
 protected:
 	friend class CDockContainerWidget;
 	friend class CDockAreaWidget;
 	friend class CFloatingDockContainer;
 	friend class CDockManager;
-	friend struct DockContainerWidgetPrivate;
+	friend struct DockManagerPrivate;
+	friend class DockContainerWidgetPrivate;
+	friend class CDockAreaTabBar;
+	friend class CDockWidgetTab;
+	friend struct DockWidgetTabPrivate;
 
 	/**
 	 * Assigns the dock manager that manages this dock widget
@@ -98,18 +110,44 @@ protected:
 	 */
 	void flagAsUnassigned();
 
+	/**
+	 * Call this function to emit a topLevelChanged() signal and to update
+	 * the dock area tool bar visibility
+	 */
+	static void emitTopLevelEventForWidget(CDockWidget* TopLevelDockWidget, bool Floating);
+
+	/**
+	 * Use this function to emit a top level changed event.
+	 * Do never use emit topLevelChanged(). Always use this function because
+	 * it only emits a signal if the floating state has really changed
+	 */
+	void emitTopLevelChanged(bool Floating);
+
+	/**
+	 * Internal function for modifying the closed state when restoring
+	 * a saved docking state
+	 */
+	void setClosedState(bool Closed);
+
+	/**
+	 * Internal toggle view function that does not check if the widget
+	 * already is in the given state
+	 */
+	void toggleViewInternal(bool Open);
+
 public:
+	using Super = QFrame;
+
 	enum DockWidgetFeature
 	{
 		DockWidgetClosable = 0x01,
-		DockWidgetMovable = 0x02,
+		DockWidgetMovable = 0x02,///< this feature is not properly implemented yet and is ignored
 		DockWidgetFloatable = 0x04,
 		AllDockWidgetFeatures = DockWidgetClosable | DockWidgetMovable | DockWidgetFloatable,
 		NoDockWidgetFeatures = 0x00
 	};
 	Q_DECLARE_FLAGS(DockWidgetFeatures, DockWidgetFeature)
 
-
 	enum eState
 	{
 		StateHidden,
@@ -117,6 +155,30 @@ public:
 		StateFloating
 	};
 
+	/**
+	 * Sets the widget for the dock widget to widget.
+	 * The InsertMode defines how the widget is inserted into the dock widget.
+	 * The content of a dock widget should be resizable do a very small size to
+	 * prevent the dock widget from blocking the resizing. To ensure, that a
+	 * dock widget can be resized very well, it is better to insert the content+
+	 * widget into a scroll area or to provide a widget that is already a scroll
+	 * area or that contains a scroll area.
+	 * If the InsertMode is AutoScrollArea, the DockWidget tries to automatically
+	 * detect how to insert the given widget. If the widget is derived from
+	 * QScrollArea (i.e. an QAbstractItemView), then the widget is inserted
+	 * directly. If the given widget is not a scroll area, the widget will be
+	 * inserted into a scroll area.
+	 * To force insertion into a scroll area, you can also provide the InsertMode
+	 * ForceScrollArea. To prevent insertion into a scroll area, you can
+	 * provide the InsertMode ForceNoScrollArea
+	 */
+	enum eInsertMode
+	{
+		AutoScrollArea,
+		ForceScrollArea,
+		ForceNoScrollArea
+	};
+
 	/**
 	 * This mode configures the behavior of the toggle view action.
 	 * If the mode if ActionModeToggle, then the toggle view action is
@@ -131,6 +193,7 @@ public:
 		ActionModeShow   //!< ActionModeShow
 	};
 
+
 	/**
 	 * This constructor creates a dock widget with the given title.
 	 * The title is the text that is shown in the window title when the dock
@@ -142,6 +205,7 @@ public:
 	 * If your title is not unique or if you would like to change the title
 	 * during runtime, you need to set a unique object name explicitely
 	 * by calling setObjectName() after construction.
+	 * Use the layoutFlags to configure the layout of the dock widget.
 	 */
 	CDockWidget(const QString &title, QWidget* parent = 0);
 
@@ -151,9 +215,33 @@ public:
 	virtual ~CDockWidget();
 
 	/**
-	 * Sets the widget for the dock widget to widget.
+	 * We return a fixed minimum size hint for all dock widgets
 	 */
-	void setWidget(QWidget* widget);
+	virtual QSize minimumSizeHint() const override;
+
+	/**
+	 * Sets the widget for the dock widget to widget.
+	 * The InsertMode defines how the widget is inserted into the dock widget.
+	 * The content of a dock widget should be resizable do a very small size to
+	 * prevent the dock widget from blocking the resizing. To ensure, that a
+	 * dock widget can be resized very well, it is better to insert the content+
+	 * widget into a scroll area or to provide a widget that is already a scroll
+	 * area or that contains a scroll area.
+	 * If the InsertMode is AutoScrollArea, the DockWidget tries to automatically
+	 * detect how to insert the given widget. If the widget is derived from
+	 * QScrollArea (i.e. an QAbstractItemView), then the widget is inserted
+	 * directly. If the given widget is not a scroll area, the widget will be
+	 * inserted into a scroll area.
+	 * To force insertion into a scroll area, you can also provide the InsertMode
+	 * ForceScrollArea. To prevent insertion into a scroll area, you can
+	 * provide the InsertMode ForceNoScrollArea
+	 */
+	void setWidget(QWidget* widget, eInsertMode InsertMode = AutoScrollArea);
+
+	/**
+	 * Remove the widget from the dock and give ownership back to the caller
+	 */
+	QWidget* takeWidget();
 
 	/**
 	 * Returns the widget for the dock widget. This function returns zero if
@@ -164,7 +252,7 @@ public:
 	/**
 	 * Returns the title bar widget of this dock widget
 	 */
-	CDockWidgetTab* titleBar() const;
+	CDockWidgetTab* tabWidget() const;
 
 	/**
 	 * Sets, whether the dock widget is movable, closable, and floatable.
@@ -193,7 +281,7 @@ public:
 
 	/**
 	 * Returns the dock container widget this dock area widget belongs to or 0
-	 * if this dock widget has nt been docked yet
+	 * if this dock widget has not been docked yet
 	 */
 	CDockContainerWidget* dockContainer() const;
 
@@ -205,9 +293,19 @@ public:
 
 	/**
 	 * This property holds whether the dock widget is floating.
+	 * A dock widget is only floating, if it is the one and only widget inside
+	 * of a floating container. If there are more than one dock widget in a
+	 * floating container, the all dock widgets are docked and not floating.
 	 */
 	bool isFloating() const;
 
+	/**
+	 * This function returns true, if this dock widget is in a floating.
+	 * The function returns true, if the dock widget is floating and it also
+	 * returns true if it is docked inside of a floating container.
+	 */
+	bool isInFloatingContainer() const;
+
 	/**
 	 * Returns true, if this dock widget is closed.
 	 */
@@ -232,10 +330,75 @@ public:
 	void setIcon(const QIcon& Icon);
 
 	/**
-	 * Returns tzhe icon that has been assigned to the dock widget
+	 * Returns the icon that has been assigned to the dock widget
 	 */
 	QIcon icon() const;
 
+	/**
+	 * If the WithToolBar layout flag is enabled, then this function returns
+	 * the dock widget toolbar. If the flag is disabled, the function returns
+	 * a nullptr.
+	 * This function returns the dock widget top tool bar.
+	 * If no toolbar is assigned, this function returns nullptr. To get a vaild
+	 * toolbar you either need to create a default empty toolbar via
+	 * createDefaultToolBar() function or you need to assign you custom
+	 * toolbar via setToolBar().
+	 */
+	QToolBar* toolBar() const;
+
+	/**
+	 * If you would like to use the default top tool bar, then call this
+	 * function to create the default tool bar.
+	 * After this function the toolBar() function will return a valid toolBar()
+	 * object.
+	 */
+	QToolBar* createDefaultToolBar();
+
+	/**
+	 * Assign a new tool bar that is shown above the content widget.
+	 * The dock widget will become the owner of the tool bar and deletes it
+	 * on destruction
+	 */
+	void setToolBar(QToolBar* ToolBar);
+
+	/**
+	 * This function sets the tool button style for the given dock widget state.
+	 * It is possible to switch the tool button style depending on the state.
+	 * If a dock widget is floating, then here are more space and it is
+	 * possible to select a style that requires more space like
+	 * Qt::ToolButtonTextUnderIcon. For the docked state Qt::ToolButtonIconOnly
+	 * might be better.
+	 */
+	void setToolBarStyle(Qt::ToolButtonStyle Style, eState State);
+
+	/**
+	 * Returns the tool button style for the given docking state.
+	 * \see setToolBarStyle()
+	 */
+	Qt::ToolButtonStyle toolBarStyle(eState State) const;
+
+	/**
+	 * This function sets the tool button icon size for the given state.
+	 * If a dock widget is floating, there is more space an increasing the
+	 * icon size is possible. For docked widgets, small icon sizes, eg. 16 x 16
+	 * might be better.
+	 */
+	void setToolBarIconSize(const QSize& IconSize, eState State);
+
+	/**
+	 * Returns the icon size for a given docking state.
+	 * \see setToolBarIconSize()
+	 */
+	QSize toolBarIconSize(eState State) const;
+
+
+	#ifndef QT_NO_TOOLTIP
+	/**
+	 * This is function sets text tooltip for title bar widget 
+	 * and tooltip for toggle view action
+	 */
+	void setTabToolTip(const QString &text);
+	#endif
 
 public: // reimplements QFrame -----------------------------------------------
 	/**
@@ -266,6 +429,13 @@ signals:
 	 * changed
 	 */
 	void titleChanged(const QString& Title);
+
+	/**
+	 * This signal is emitted when the floating property changes.
+	 * The topLevel parameter is true if the dock widget is now floating;
+	 * otherwise it is false.
+	 */
+	void topLevelChanged(bool topLevel);
 }; // class DockWidget
 }
  // namespace ads

src/DockWidgetTab.cpp

@@ -28,6 +28,7 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
+#include "ElidingLabel.h"
 #include "DockWidgetTab.h"
 
 #include <QBoxLayout>
@@ -37,6 +38,9 @@
 #include <QApplication>
 #include <QSplitter>
 #include <QDebug>
+#include <QToolButton>
+#include <QPushButton>
+#include <QMenu>
 
 #include "ads_globals.h"
 #include "DockWidget.h"
@@ -45,19 +49,12 @@
 #include "DockOverlay.h"
 #include "DockManager.h"
 
+#include <iostream>
+
 namespace ads
 {
-/**
- * The different dragging states
- */
-enum eDragState
-{
-	DraggingInactive,     //!< DraggingInactive
-	DraggingMousePressed, //!< DraggingMousePressed
-	DraggingTab,          //!< DraggingTab
-	DraggingFloatingWidget//!< DraggingFloatingWidget
-};
 
+using tTabLabel = CElidingLabel;
 
 /**
  * Private data class of CDockWidgetTab class (pimpl)
@@ -66,14 +63,16 @@ struct DockWidgetTabPrivate
 {
 	CDockWidgetTab* _this;
 	CDockWidget* DockWidget;
-	QLabel* IconLabel;
-	QLabel* TitleLabel;
+	QLabel* IconLabel = nullptr;
+	tTabLabel* TitleLabel;
 	QPoint DragStartMousePosition;
 	bool IsActiveTab = false;
 	CDockAreaWidget* DockArea = nullptr;
 	eDragState DragState = DraggingInactive;
 	CFloatingDockContainer* FloatingWidget = nullptr;
 	QIcon Icon;
+	QAbstractButton* CloseButton = nullptr;
+	QSpacerItem* IconTextSpacer;
 
 	/**
 	 * Private data constructor
@@ -105,7 +104,7 @@ struct DockWidgetTabPrivate
 	 */
 	bool titleAreaGeometryContains(const QPoint& GlobalPos) const
 	{
-		return DockArea->titleAreaGeometry().contains(DockArea->mapFromGlobal(GlobalPos));
+		return DockArea->titleBarGeometry().contains(DockArea->mapFromGlobal(GlobalPos));
 	}
 
 	/**
@@ -113,7 +112,32 @@ struct DockWidgetTabPrivate
 	 * Returns true, if floating has been started and false if floating
 	 * is not possible for any reason
 	 */
-	bool startFloating();
+	bool startFloating(eDragState DraggingState = DraggingFloatingWidget);
+
+	/**
+	 * Returns true if the given config flag is set
+	 */
+	bool testConfigFlag(CDockManager::eConfigFlag Flag) const
+	{
+		return CDockManager::configFlags().testFlag(Flag);
+	}
+
+	/**
+	 * Creates the close button as QPushButton or as QToolButton
+	 */
+	QAbstractButton* createCloseButton() const
+	{
+		if (testConfigFlag(CDockManager::TabCloseButtonIsToolButton))
+		{
+			auto Button = new QToolButton();
+			Button->setAutoRaise(true);
+			return Button;
+		}
+		else
+		{
+			return new QPushButton();
+		}
+	}
 };
 // struct DockWidgetTabPrivate
 
@@ -129,21 +153,42 @@ DockWidgetTabPrivate::DockWidgetTabPrivate(CDockWidgetTab* _public) :
 //============================================================================
 void DockWidgetTabPrivate::createLayout()
 {
-	QBoxLayout* l = new QBoxLayout(QBoxLayout::LeftToRight);
-	l->setContentsMargins(0, 0, 0, 0);
-	_this->setLayout(l);
-
-	IconLabel = new QLabel();
-	IconLabel->setAlignment(Qt::AlignVCenter);
-	l->addWidget(IconLabel, Qt::AlignVCenter);
-
-	TitleLabel = new QLabel();
-	TitleLabel->setObjectName("dockWidgetTabLabel");
-	l->addWidget(TitleLabel, 1);
-
-	IconLabel->setVisible(false);
-	TitleLabel->setVisible(true);
+	TitleLabel = new tTabLabel();
+	TitleLabel->setElideMode(Qt::ElideRight);
 	TitleLabel->setText(DockWidget->windowTitle());
+	TitleLabel->setObjectName("dockWidgetTabLabel");
+	TitleLabel->setAlignment(Qt::AlignCenter);
+
+	CloseButton = createCloseButton();
+	CloseButton->setObjectName("tabCloseButton");
+	// The standard icons do does not look good on high DPI screens
+	QIcon CloseIcon;
+	QPixmap normalPixmap = _this->style()->standardPixmap(QStyle::SP_TitleBarCloseButton, 0, CloseButton);
+	CloseIcon.addPixmap(normalPixmap, QIcon::Normal);
+	CloseIcon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25), QIcon::Disabled);
+	CloseButton->setIcon(CloseIcon);
+    CloseButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    _this->onDockWidgetFeaturesChanged();
+#ifndef QT_NO_TOOLTIP
+	CloseButton->setToolTip(QObject::tr("Close Tab"));
+#endif
+	_this->connect(CloseButton, SIGNAL(clicked()), SIGNAL(closeRequested()));
+
+	QFontMetrics fm(TitleLabel->font());
+	int Spacing = qRound(fm.height() / 4.0);
+
+	// Fill the layout
+	QBoxLayout* Layout = new QBoxLayout(QBoxLayout::LeftToRight);
+	Layout->setContentsMargins(2 * Spacing,0,0,0);
+	Layout->setSpacing(0);
+	_this->setLayout(Layout);
+	Layout->addWidget(TitleLabel, 1);
+	Layout->addSpacing(Spacing);
+	Layout->addWidget(CloseButton);
+	Layout->addSpacing(qRound(Spacing * 4.0 / 3.0));
+	Layout->setAlignment(Qt::AlignCenter);
+
+	TitleLabel->setVisible(true);
 }
 
 //============================================================================
@@ -160,42 +205,50 @@ void DockWidgetTabPrivate::moveTab(QMouseEvent* ev)
 
 
 //============================================================================
-bool DockWidgetTabPrivate::startFloating()
+bool DockWidgetTabPrivate::startFloating(eDragState DraggingState)
 {
-	qDebug() << "isFloating " << DockWidget->dockContainer()->isFloating();
-	qDebug() << "areaCount " << DockWidget->dockContainer()->dockAreaCount();
-	qDebug() << "widgetCount " << DockWidget->dockAreaWidget()->count();
+	auto dockContainer = DockWidget->dockContainer();
+    ADS_PRINT("isFloating " << dockContainer->isFloating());
+    ADS_PRINT("areaCount " << dockContainer->dockAreaCount());
+    ADS_PRINT("widgetCount " << DockWidget->dockAreaWidget()->dockWidgetsCount());
 	// if this is the last dock widget inside of this floating widget,
 	// then it does not make any sense, to make it floating because
 	// it is already floating
-	 if (DockWidget->dockContainer()->isFloating()
-	 && (DockWidget->dockContainer()->visibleDockAreaCount() == 1)
-	 && (DockWidget->dockAreaWidget()->count() == 1))
+	 if (dockContainer->isFloating()
+	 && (dockContainer->visibleDockAreaCount() == 1)
+	 && (DockWidget->dockAreaWidget()->dockWidgetsCount() == 1))
 	{
 		return false;
 	}
 
-	qDebug() << "startFloating";
-	DragState = DraggingFloatingWidget;
+    ADS_PRINT("startFloating");
+	DragState = DraggingState;
 	QSize Size = DockArea->size();
 	CFloatingDockContainer* FloatingWidget = nullptr;
-	if (DockArea->count() > 1)
+	if (DockArea->dockWidgetsCount() > 1)
 	{
 		// If section widget has multiple tabs, we take only one tab
 		FloatingWidget = new CFloatingDockContainer(DockWidget);
 	}
 	else
 	{
-		qDebug() << "DockWidgetTabPrivate::startFloating DockArea";
 		// If section widget has only one content widget, we can move the complete
 		// dock area into floating widget
 		FloatingWidget = new CFloatingDockContainer(DockArea);
 	}
 
-    FloatingWidget->startFloating(DragStartMousePosition, Size);
-    auto Overlay = DockWidget->dockManager()->containerOverlay();
-	Overlay->setAllowedAreas(OuterDockAreas);
-	this->FloatingWidget = FloatingWidget;
+    if (DraggingFloatingWidget == DraggingState)
+    {
+        FloatingWidget->startDragging(DragStartMousePosition, Size, _this);
+    	auto Overlay = DockWidget->dockManager()->containerOverlay();
+    	Overlay->setAllowedAreas(OuterDockAreas);
+    	this->FloatingWidget = FloatingWidget;
+    }
+    else
+    {
+     	FloatingWidget->initFloatingGeometry(DragStartMousePosition, Size);
+    }
+    DockWidget->emitTopLevelChanged(true);
 	return true;
 }
 
@@ -213,7 +266,7 @@ CDockWidgetTab::CDockWidgetTab(CDockWidget* DockWidget, QWidget *parent) :
 //============================================================================
 CDockWidgetTab::~CDockWidgetTab()
 {
-	qDebug() << "~CDockWidgetTab()";
+    ADS_PRINT("~CDockWidgetTab()");
 	delete d;
 }
 
@@ -223,13 +276,13 @@ void CDockWidgetTab::mousePressEvent(QMouseEvent* ev)
 {
 	if (ev->button() == Qt::LeftButton)
 	{
-		qDebug() << "CDockWidgetTab::mousePressEvent";
 		ev->accept();
         d->DragStartMousePosition = ev->pos();
         d->DragState = DraggingMousePressed;
+        emit clicked();
 		return;
 	}
-	QFrame::mousePressEvent(ev);
+	Super::mousePressEvent(ev);
 }
 
 
@@ -237,30 +290,15 @@ void CDockWidgetTab::mousePressEvent(QMouseEvent* ev)
 //============================================================================
 void CDockWidgetTab::mouseReleaseEvent(QMouseEvent* ev)
 {
-	qDebug() << "CDockWidgetTab::mouseReleaseEvent";
-	// End of tab moving, change order now
+	// End of tab moving, emit signal
 	if (d->isDraggingState(DraggingTab) && d->DockArea)
 	{
-		// Find tab under mouse
-		QPoint pos = d->DockArea->mapFromGlobal(ev->globalPos());
-		int fromIndex = d->DockArea->tabIndex(d->DockWidget);
-		int toIndex = d->DockArea->indexOfContentByTitlePos(pos, this);
-		if (-1 == toIndex)
-		{
-			toIndex = d->DockArea->count() - 1;
-		}
-		qDebug() << "Move tab from " << fromIndex << " to " << toIndex;
-		d->DockArea->reorderDockWidget(fromIndex, toIndex);
+		emit moved(ev->globalPos());
 	}
 
-    if (!d->DragStartMousePosition.isNull())
-    {
-		emit clicked();
-    }
-
     d->DragStartMousePosition = QPoint();
     d->DragState = DraggingInactive;
-	QFrame::mouseReleaseEvent(ev);
+	Super::mouseReleaseEvent(ev);
 }
 
 
@@ -270,15 +308,15 @@ void CDockWidgetTab::mouseMoveEvent(QMouseEvent* ev)
     if (!(ev->buttons() & Qt::LeftButton) || d->isDraggingState(DraggingInactive))
     {
     	d->DragState = DraggingInactive;
-        QFrame::mouseMoveEvent(ev);
+        Super::mouseMoveEvent(ev);
         return;
     }
 
-    // move floating winwdow
+    // move floating window
     if (d->isDraggingState(DraggingFloatingWidget))
     {
         d->FloatingWidget->moveFloating();
-        QFrame::mouseMoveEvent(ev);
+        Super::mouseMoveEvent(ev);
         return;
     }
 
@@ -290,24 +328,52 @@ void CDockWidgetTab::mouseMoveEvent(QMouseEvent* ev)
     	d->moveTab(ev);
     }
 
-    bool MouseInsideTitleArea = d->titleAreaGeometryContains(ev->globalPos());
-    if (!MouseInsideTitleArea)
+    // Maybe a fixed drag distance is better here ?
+    int DragDistanceY = qAbs(d->DragStartMousePosition.y() - ev->pos().y());
+    if (DragDistanceY >= CDockManager::startDragDistance())
 	{
+		// If this is the last dock area in a dock container with only
+    	// one single dock widget it does not make  sense to move it to a new
+    	// floating widget and leave this one empty
+		if (d->DockArea->dockContainer()->isFloating()
+		 && d->DockArea->openDockWidgetsCount() == 1
+		 && d->DockArea->dockContainer()->visibleDockAreaCount() == 1)
+		{
+			return;
+		}
+
     	// Floating is only allowed for widgets that are movable
-        if (d->DockWidget->features().testFlag(CDockWidget::DockWidgetMovable))
+        if (d->DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable))
         {
             d->startFloating();
         }
     	return;
 	}
-    else if (d->DockArea->count() > 1
+    else if (d->DockArea->openDockWidgetsCount() > 1
      && (ev->pos() - d->DragStartMousePosition).manhattanLength() >= QApplication::startDragDistance()) // Wait a few pixels before start moving
 	{
         d->DragState = DraggingTab;
 		return;
 	}
 
-   QFrame::mouseMoveEvent(ev);
+   Super::mouseMoveEvent(ev);
+}
+
+
+//============================================================================
+void CDockWidgetTab::contextMenuEvent(QContextMenuEvent* ev)
+{
+	ev->accept();
+
+	d->DragStartMousePosition = ev->pos();
+	QMenu Menu(this);
+	auto Action = Menu.addAction(tr("Detach"), this, SLOT(onDetachActionTriggered()));
+	Action->setEnabled(d->DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable));
+	Menu.addSeparator();
+	Action = Menu.addAction(tr("Close"), this, SIGNAL(closeRequested()));
+	Action->setEnabled(isClosable());
+	Menu.addAction(tr("Close Others"), this, SIGNAL(closeOtherTabsRequested()));
+	Menu.exec(mapToGlobal(ev->pos()));
 }
 
 
@@ -321,6 +387,11 @@ bool CDockWidgetTab::isActiveTab() const
 //============================================================================
 void CDockWidgetTab::setActiveTab(bool active)
 {
+	bool DockWidgetClosable = d->DockWidget->features().testFlag(CDockWidget::DockWidgetClosable);
+	bool ActiveTabHasCloseButton = d->testConfigFlag(CDockManager::ActiveTabHasCloseButton);
+	bool AllTabsHaveCloseButton = d->testConfigFlag(CDockManager::AllTabsHaveCloseButton);
+	bool TabHasCloseButton = (ActiveTabHasCloseButton && active) | AllTabsHaveCloseButton;
+	d->CloseButton->setVisible(DockWidgetClosable && TabHasCloseButton);
 	if (d->IsActiveTab == active)
 	{
 		return;
@@ -361,9 +432,38 @@ CDockAreaWidget* CDockWidgetTab::dockAreaWidget() const
 //============================================================================
 void CDockWidgetTab::setIcon(const QIcon& Icon)
 {
+	QBoxLayout* Layout = qobject_cast<QBoxLayout*>(layout());
+	if (!d->IconLabel && Icon.isNull())
+	{
+		return;
+	}
+
+	if (!d->IconLabel)
+	{
+		d->IconLabel = new QLabel();
+		d->IconLabel->setAlignment(Qt::AlignVCenter);
+		d->IconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
+		#ifndef QT_NO_TOOLTIP
+		d->IconLabel->setToolTip(d->TitleLabel->toolTip());
+		#endif
+		Layout->insertWidget(0, d->IconLabel, Qt::AlignVCenter);
+		Layout->insertSpacing(1, qRound(1.5 * Layout->contentsMargins().left() / 2.0));
+	}
+	else if (Icon.isNull())
+	{
+		// Remove icon label and spacer item
+		Layout->removeWidget(d->IconLabel);
+		Layout->removeItem(Layout->itemAt(0));
+		delete d->IconLabel;
+		d->IconLabel = nullptr;
+	}
+
 	d->Icon = Icon;
-	d->IconLabel->setPixmap(Icon.pixmap(this->windowHandle(), QSize(16, 16)));
-	d->IconLabel->setVisible(true);
+	if (d->IconLabel)
+	{
+		d->IconLabel->setPixmap(Icon.pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize, nullptr, this)));
+		d->IconLabel->setVisible(true);
+	}
 }
 
 
@@ -372,7 +472,94 @@ const QIcon& CDockWidgetTab::icon() const
 {
 	return d->Icon;
 }
-} // namespace ads
 
+
+//============================================================================
+QString CDockWidgetTab::text() const
+{
+	return d->TitleLabel->text();
+}
+
+
+//============================================================================
+void CDockWidgetTab::mouseDoubleClickEvent(QMouseEvent *event)
+{
+	// If this is the last dock area in a dock container it does not make
+	// sense to move it to a new floating widget and leave this one
+	// empty
+	if ((!d->DockArea->dockContainer()->isFloating() || d->DockArea->dockWidgetsCount() > 1)
+		&& d->DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable))
+	{
+		d->DragStartMousePosition = event->pos();
+		d->startFloating(DraggingInactive);
+	}
+
+	Super::mouseDoubleClickEvent(event);
+}
+
+
+//============================================================================
+void CDockWidgetTab::setVisible(bool visible)
+{
+	// Just here for debugging to insert debug output
+	Super::setVisible(visible);
+}
+
+
+//============================================================================
+void CDockWidgetTab::setText(const QString& title)
+{
+	d->TitleLabel->setText(title);
+}
+
+
+
+//============================================================================
+bool CDockWidgetTab::isClosable() const
+{
+	return d->DockWidget && d->DockWidget->features().testFlag(CDockWidget::DockWidgetClosable);
+}
+
+
+//===========================================================================
+void CDockWidgetTab::onDetachActionTriggered()
+{
+	if (!d->DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable))
+	{
+		return;
+	}
+	d->DragStartMousePosition = mapFromGlobal(QCursor::pos());
+	d->startFloating(DraggingInactive);
+}
+
+
+//============================================================================
+bool CDockWidgetTab::event(QEvent *e)
+{
+	#ifndef QT_NO_TOOLTIP
+	if (e->type() == QEvent::ToolTipChange)
+	{
+		const auto text = toolTip();
+		d->TitleLabel->setToolTip(text);
+	}
+	#endif
+	return Super::event(e);
+}
+
+
+//============================================================================
+void CDockWidgetTab::onDockWidgetFeaturesChanged()
+{
+	auto Features = d->DockWidget->features();
+	auto SizePolicy = d->CloseButton->sizePolicy();
+	SizePolicy.setRetainSizeWhenHidden(Features.testFlag(CDockWidget::DockWidgetClosable)
+		&& d->testConfigFlag(CDockManager::RetainTabSizeWhenCloseButtonHidden));
+	d->CloseButton->setSizePolicy(SizePolicy);
+}
+
+
+
+
+} // namespace ads
 //---------------------------------------------------------------------------
 // EOF DockWidgetTab.cpp

src/DockWidgetTab.h

@@ -53,13 +53,25 @@ class ADS_EXPORT CDockWidgetTab : public QFrame
 private:
 	DockWidgetTabPrivate* d; ///< private data (pimpl)
 	friend struct DockWidgetTabPrivate;
+	friend class CDockWidget;
+	void onDockWidgetFeaturesChanged();
+
+private slots:
+	void onDetachActionTriggered();
 
 protected:
 	virtual void mousePressEvent(QMouseEvent* ev) override;
 	virtual void mouseReleaseEvent(QMouseEvent* ev) override;
 	virtual void mouseMoveEvent(QMouseEvent* ev) override;
+	virtual void contextMenuEvent(QContextMenuEvent* ev) override;
+
+	/**
+	 * Double clicking the tab widget makes the assigned dock widget floating
+	 */
+	virtual void mouseDoubleClickEvent(QMouseEvent *event) override;
 
 public:
+	using Super = QFrame;
 	/**
 	 * Default Constructor
 	 * param[in] DockWidget The dock widget this title bar belongs to
@@ -110,9 +122,36 @@ public:
 	 */
 	const QIcon& icon() const;
 
+	/**
+	 * Returns the tab text
+	 */
+	QString text() const;
+
+	/**
+	 * Sets the tab text
+	 */
+	void setText(const QString& title);
+
+	/**
+	 * This function returns true if the assigned dock widget is closeable
+	 */
+	bool isClosable() const;
+
+	/**
+	* Track event ToolTipChange and set child ToolTip 
+	*/
+	virtual bool event(QEvent *e) override;
+
+
+public slots:
+	virtual void setVisible(bool visible) override;
+
 signals:
 	void activeTabChanged();
 	void clicked();
+	void closeRequested();
+	void closeOtherTabsRequested();
+	void moved(const QPoint& GlobalPos);
 }; // class DockWidgetTab
 }
  // namespace ads

src/ElidingLabel.cpp

@@ -0,0 +1,212 @@
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   ElidingLabel.cpp
+/// \author Uwe Kindler
+/// \date   05.11.2018
+/// \brief  Implementation of CElidingLabel
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "ElidingLabel.h"
+#include <QMouseEvent>
+
+
+namespace ads
+{
+/**
+ * Private data of public CClickableLabel
+ */
+struct ElidingLabelPrivate
+{
+	CElidingLabel* _this;
+	Qt::TextElideMode ElideMode = Qt::ElideNone;
+	QString Text;
+
+	ElidingLabelPrivate(CElidingLabel* _public) : _this(_public) {}
+
+	void elideText(int Width);
+
+	/**
+	 * Convenience function to check if the
+	 */
+	bool isModeElideNone() const
+	{
+		return Qt::ElideNone == ElideMode;
+	}
+};
+
+
+//============================================================================
+void ElidingLabelPrivate::elideText(int Width)
+{
+	if (isModeElideNone())
+	{
+		return;
+	}
+    QFontMetrics fm = _this->fontMetrics();
+    QString  str = fm.elidedText(Text, ElideMode, Width - _this->margin() * 2 - _this->indent());
+    if (str == "…")
+    {
+    	str = Text.at(0);
+    }
+    _this->QLabel::setText(str);
+}
+
+
+//============================================================================
+CElidingLabel::CElidingLabel(QWidget* parent, Qt::WindowFlags f)
+	: QLabel(parent, f),
+	  d(new ElidingLabelPrivate(this))
+{
+
+}
+
+
+//============================================================================
+CElidingLabel::CElidingLabel(const QString& text, QWidget* parent, Qt::WindowFlags f)
+	: QLabel(text, parent,f),
+	  d(new ElidingLabelPrivate(this))
+{
+	d->Text = text;
+#ifndef QT_NO_TOOLTIP
+	setToolTip(text);
+#endif
+}
+
+
+//============================================================================
+CElidingLabel::~CElidingLabel()
+{
+	delete d;
+}
+
+
+//============================================================================
+Qt::TextElideMode CElidingLabel::elideMode() const
+{
+	return d->ElideMode;
+}
+
+
+//============================================================================
+void CElidingLabel::setElideMode(Qt::TextElideMode mode)
+{
+	d->ElideMode = mode;
+	d->elideText(size().width());
+}
+
+
+//============================================================================
+void CElidingLabel::mouseReleaseEvent(QMouseEvent* event)
+{
+	Super::mouseReleaseEvent(event);
+	if (event->button() != Qt::LeftButton)
+	{
+		return;
+	}
+
+	emit clicked();
+}
+
+
+//============================================================================
+void CElidingLabel::mouseDoubleClickEvent( QMouseEvent *ev )
+{
+	Q_UNUSED(ev)
+	emit doubleClicked();
+	Super::mouseDoubleClickEvent(ev);
+}
+
+
+//============================================================================
+void CElidingLabel::resizeEvent(QResizeEvent *event)
+{
+	if (!d->isModeElideNone())
+	{
+		d->elideText(event->size().width());
+	}
+    Super::resizeEvent(event);
+}
+
+
+//============================================================================
+QSize CElidingLabel::minimumSizeHint() const
+{
+    if (pixmap() != nullptr || d->isModeElideNone())
+    {
+        return QLabel::minimumSizeHint();
+    }
+    const QFontMetrics  &fm = fontMetrics();
+    #if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
+        QSize size(fm.horizontalAdvance(d->Text.left(2) + "…"), fm.height());
+    #else
+        QSize size(fm.width(d->Text.left(2) + "…"), fm.height());
+    #endif
+    return size;
+}
+
+
+//============================================================================
+QSize CElidingLabel::sizeHint() const
+{
+    if (pixmap() != nullptr || d->isModeElideNone())
+    {
+        return QLabel::sizeHint();
+    }
+    const QFontMetrics& fm = fontMetrics();
+    #if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
+        QSize size(fm.horizontalAdvance(d->Text), QLabel::sizeHint().height());
+    #else
+        QSize size(fm.width(d->Text), QLabel::sizeHint().height());
+    #endif
+	return size;
+}
+
+
+//============================================================================
+void CElidingLabel::setText(const QString &text)
+{
+	if (d->isModeElideNone())
+	{
+		Super::setText(text);
+	}
+	else
+	{
+		d->Text = text;
+#ifndef QT_NO_TOOLTIP
+		setToolTip( text );
+#endif
+		d->elideText(this->size().width());
+	}
+}
+
+
+//============================================================================
+QString CElidingLabel::text() const
+{
+	return d->Text;
+}
+} // namespace QtLabb
+
+//---------------------------------------------------------------------------
+// EOF ClickableLabel.cpp

src/ElidingLabel.h

@@ -0,0 +1,99 @@
+#ifndef ElidingLabelH
+#define ElidingLabelH
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   ElidingLabel.h
+/// \author Uwe Kindler
+/// \date   05.11.2018
+/// \brief  Declaration of CElidingLabel
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <QLabel>
+
+#include "ads_globals.h"
+
+namespace ads
+{
+struct ElidingLabelPrivate;
+
+/**
+ * A QLabel that supports eliding text.
+ * Because the functions setText() and text() are no virtual functions setting
+ * and reading the text via a pointer to the base class QLabel does not work
+ * properly
+ */
+class ADS_EXPORT CElidingLabel : public QLabel
+{
+	Q_OBJECT
+private:
+	ElidingLabelPrivate* d;
+	friend struct ElidingLabelPrivate;
+
+protected:
+	virtual void mouseReleaseEvent(QMouseEvent* event) override;
+    virtual void resizeEvent( QResizeEvent *event ) override;
+    virtual void mouseDoubleClickEvent( QMouseEvent *ev ) override;
+
+public:
+    using Super = QLabel;
+
+	CElidingLabel(QWidget* parent = 0, Qt::WindowFlags f = 0);
+	CElidingLabel(const QString& text, QWidget* parent = 0, Qt::WindowFlags f = 0);
+	virtual ~CElidingLabel();
+
+	/**
+	 * Returns the text elide mode.
+	 * The default mode is ElideNone
+	 */
+	Qt::TextElideMode elideMode() const;
+
+	/**
+	 * Sets the text elide mode
+	 */
+	void setElideMode(Qt::TextElideMode mode);
+
+
+public: // reimplements QLabel ----------------------------------------------
+	virtual QSize minimumSizeHint() const override;
+	virtual QSize sizeHint() const override;
+	void setText(const QString &text);
+	QString text() const;
+
+signals:
+	/**
+	 * This signal is emitted if the user clicks on the label (i.e. pressed
+	 * down then released while the mouse cursor is inside the label)
+	 */
+	void clicked();
+
+	/**
+	 * This signal is emitted if the user does a double click on the label
+	 */
+	void doubleClicked();
+}; //class CElidingLabel
+
+} // namespace QtLabb
+
+//---------------------------------------------------------------------------
+#endif // ElidingLabelH

src/FloatingDockContainer.cpp

@@ -1,21 +1,20 @@
 /*******************************************************************************
-** Qt Advanced Docking System
-** Copyright (C) 2017 Uwe Kindler
-** 
-** This library is free software; you can redistribute it and/or
-** modify it under the terms of the GNU Lesser General Public
-** License as published by the Free Software Foundation; either
-** version 2.1 of the License, or (at your option) any later version.
-** 
-** This library is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-** Lesser General Public License for more details.
-** 
-** You should have received a copy of the GNU Lesser General Public
-** License along with this library; If not, see <http://www.gnu.org/licenses/>.
-******************************************************************************/
-
+ ** Qt Advanced Docking System
+ ** Copyright (C) 2017 Uwe Kindler
+ **
+ ** This library is free software; you can redistribute it and/or
+ ** modify it under the terms of the GNU Lesser General Public
+ ** License as published by the Free Software Foundation; either
+ ** version 2.1 of the License, or (at your option) any later version.
+ **
+ ** This library is distributed in the hope that it will be useful,
+ ** but WITHOUT ANY WARRANTY; without even the implied warranty of
+ ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ ** Lesser General Public License for more details.
+ **
+ ** You should have received a copy of the GNU Lesser General Public
+ ** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+ ******************************************************************************/
 
 //============================================================================
 /// \file   FloatingDockContainer.cpp
@@ -24,7 +23,6 @@
 /// \brief  Implementation of CFloatingDockContainer class
 //============================================================================
 
-
 //============================================================================
 //                                   INCLUDES
 //============================================================================
@@ -36,6 +34,8 @@
 #include <QPointer>
 #include <QAction>
 #include <QDebug>
+#include <QAbstractButton>
+#include <QElapsedTimer>
 
 #include "DockContainerWidget.h"
 #include "DockAreaWidget.h"
@@ -43,70 +43,107 @@
 #include "DockWidget.h"
 #include "DockOverlay.h"
 
-#include <iostream>
+#ifdef Q_OS_LINUX
+#include "linux/FloatingWidgetTitleBar.h"
+#include <xcb/xcb.h>
+#endif
 
 namespace ads
 {
 static unsigned int zOrderCounter = 0;
-
 /**
  * Private data class of CFloatingDockContainer class (pimpl)
  */
 struct FloatingDockContainerPrivate
 {
-	CFloatingDockContainer* _this;
-	CDockContainerWidget* DockContainer;
+	CFloatingDockContainer *_this;
+	CDockContainerWidget *DockContainer;
 	unsigned int zOrderIndex = ++zOrderCounter;
 	QPointer<CDockManager> DockManager;
-	bool DraggingActive = false;
-	bool NonClientAreaMouseButtonPress = false;
+	eDragState DraggingState = DraggingInactive;
 	QPoint DragStartMousePosition;
-	CDockContainerWidget* DropContainer = nullptr;
-	CDockAreaWidget* SingleDockArea = nullptr;
+	CDockContainerWidget *DropContainer = nullptr;
+	CDockAreaWidget *SingleDockArea = nullptr;
+#ifdef Q_OS_LINUX
+    QWidget* MouseEventHandler = nullptr;
+    CFloatingWidgetTitleBar* TitleBar = nullptr;
+#endif
 
 	/**
 	 * Private data constructor
 	 */
-	FloatingDockContainerPrivate(CFloatingDockContainer* _public);
+	FloatingDockContainerPrivate(CFloatingDockContainer *_public);
 
 	void titleMouseReleaseEvent();
-	void updateDropOverlays(const QPoint& GlobalPos);
-	void setDraggingActive(bool Active);
+	void updateDropOverlays(const QPoint &GlobalPos);
+
+	/**
+	 * Tests is a certain state is active
+	 */
+	bool isState(eDragState StateId) const
+	{
+		return StateId == DraggingState;
+	}
+
+	void setState(eDragState StateId)
+	{
+		DraggingState = StateId;
+	}
+
+	void setWindowTitle(const QString &Text)
+	{
+#ifdef Q_OS_LINUX
+        TitleBar->setTitle(Text);
+#else
+		_this->setWindowTitle(Text);
+#endif
+	}
 };
 // struct FloatingDockContainerPrivate
 
 //============================================================================
-FloatingDockContainerPrivate::FloatingDockContainerPrivate(CFloatingDockContainer* _public) :
+FloatingDockContainerPrivate::FloatingDockContainerPrivate(
+    CFloatingDockContainer *_public) :
 	_this(_public)
 {
 
 }
 
-
-
 //============================================================================
 void FloatingDockContainerPrivate::titleMouseReleaseEvent()
 {
-	setDraggingActive(false);
+	setState(DraggingInactive);
 	if (!DropContainer)
 	{
 		return;
 	}
 
-	if (DockManager->dockAreaOverlay()->dropAreaUnderCursor() != InvalidDockWidgetArea
-	 || DockManager->containerOverlay()->dropAreaUnderCursor() != InvalidDockWidgetArea)
+	if (DockManager->dockAreaOverlay()->dropAreaUnderCursor()
+	    != InvalidDockWidgetArea
+	    || DockManager->containerOverlay()->dropAreaUnderCursor()
+	        != InvalidDockWidgetArea)
 	{
 		// Resize the floating widget to the size of the highlighted drop area
 		// rectangle
-		QRect Rect = DockManager->containerOverlay()->dropOverlayRect();
-		if (!Rect.isValid())
+		CDockOverlay *Overlay = DockManager->containerOverlay();
+		if (!Overlay->dropOverlayRect().isValid())
 		{
-			Rect = DockManager->dockAreaOverlay()->rect();
+			Overlay = DockManager->dockAreaOverlay();
 		}
 
+		QRect Rect = Overlay->dropOverlayRect();
+		int FrameWidth = (_this->frameSize().width() - _this->rect().width())
+		    / 2;
+		int TitleBarHeight = _this->frameSize().height()
+		    - _this->rect().height() - FrameWidth;
 		if (Rect.isValid())
 		{
-			_this->resize(Rect.size());
+			QPoint TopLeft = Overlay->mapToGlobal(Rect.topLeft());
+			TopLeft.ry() += TitleBarHeight;
+			_this->setGeometry(
+			    QRect(TopLeft,
+			        QSize(Rect.width(), Rect.height() - TitleBarHeight)));
+			QApplication::processEvents();
 		}
 		DropContainer->dropFloatingWidget(_this, QCursor::pos());
 	}
@@ -115,111 +152,113 @@ void FloatingDockContainerPrivate::titleMouseReleaseEvent()
 	DockManager->dockAreaOverlay()->hideOverlay();
 }
 
-
-
 //============================================================================
-void FloatingDockContainerPrivate::updateDropOverlays(const QPoint& GlobalPos)
+void FloatingDockContainerPrivate::updateDropOverlays(const QPoint &GlobalPos)
 {
 	if (!_this->isVisible() || !DockManager)
 	{
 		return;
 	}
 
-    auto Containers = DockManager->dockContainers();
-    CDockContainerWidget* TopContainer = nullptr;
-    for (auto ContainerWidget : Containers)
-    {
-    	if (!ContainerWidget->isVisible())
-    	{
-    		continue;
-    	}
-
-    	if (DockContainer == ContainerWidget)
-    	{
-    		continue;
-    	}
-
-    	QPoint MappedPos = ContainerWidget->mapFromGlobal(GlobalPos);
-    	if (ContainerWidget->rect().contains(MappedPos))
-    	{
-    		if (!TopContainer || ContainerWidget->isInFrontOf(TopContainer))
-    		{
-    			TopContainer = ContainerWidget;
-    		}
-    	}
-    }
-
-    DropContainer = TopContainer;
-    auto ContainerOverlay = DockManager->containerOverlay();
-    auto DockAreaOverlay = DockManager->dockAreaOverlay();
-
-    if (!TopContainer)
-    {
-    	ContainerOverlay->hideOverlay();
-    	DockAreaOverlay->hideOverlay();
-    	return;
-    }
-
-    int VisibleDockAreas = TopContainer->visibleDockAreaCount();
-    ContainerOverlay->setAllowedAreas(VisibleDockAreas > 1 ?
-    	OuterDockAreas : AllDockAreas);
-	DockWidgetArea ContainerArea = ContainerOverlay->showOverlay(TopContainer);
-
-    auto DockArea = TopContainer->dockAreaAt(GlobalPos);
-    if (DockArea && DockArea->isVisible() && VisibleDockAreas > 0)
-    {
-    	DockAreaOverlay->enableDropPreview(true);
-    	DockAreaOverlay->setAllowedAreas((VisibleDockAreas == 1) ?
-    		NoDockWidgetArea : AllDockAreas);
-        DockWidgetArea Area = DockAreaOverlay->showOverlay(DockArea);
-
-        // A CenterDockWidgetArea for the dockAreaOverlay() indicates that
-        // the mouse is in the title bar. If the ContainerArea is valid
-        // then we ignore the dock area of the dockAreaOverlay() and disable
-        // the drop preview
-        if ((Area == CenterDockWidgetArea) && (ContainerArea != InvalidDockWidgetArea))
-        {
-        	DockAreaOverlay->enableDropPreview(false);
-        	ContainerOverlay->enableDropPreview(true);
-        }
-        else
-        {
-            ContainerOverlay->enableDropPreview(InvalidDockWidgetArea == Area);
-        }
-    }
-    else
-    {
-    	DockAreaOverlay->hideOverlay();
-    }
-}
-
-
-//============================================================================
-void FloatingDockContainerPrivate::setDraggingActive(bool Active)
-{
-	DraggingActive = Active;
-	if (!DraggingActive)
+	auto Containers = DockManager->dockContainers();
+	CDockContainerWidget *TopContainer = nullptr;
+	for (auto ContainerWidget : Containers)
 	{
-		NonClientAreaMouseButtonPress = false;
+		if (!ContainerWidget->isVisible())
+		{
+			continue;
+		}
+
+		if (DockContainer == ContainerWidget)
+		{
+			continue;
+		}
+
+		QPoint MappedPos = ContainerWidget->mapFromGlobal(GlobalPos);
+		if (ContainerWidget->rect().contains(MappedPos))
+		{
+			if (!TopContainer || ContainerWidget->isInFrontOf(TopContainer))
+			{
+				TopContainer = ContainerWidget;
+			}
+		}
+	}
+
+	DropContainer = TopContainer;
+	auto ContainerOverlay = DockManager->containerOverlay();
+	auto DockAreaOverlay = DockManager->dockAreaOverlay();
+
+	if (!TopContainer)
+	{
+		ContainerOverlay->hideOverlay();
+		DockAreaOverlay->hideOverlay();
+		return;
+	}
+
+	int VisibleDockAreas = TopContainer->visibleDockAreaCount();
+	ContainerOverlay->setAllowedAreas(
+	    VisibleDockAreas > 1 ? OuterDockAreas : AllDockAreas);
+	DockWidgetArea ContainerArea = ContainerOverlay->showOverlay(TopContainer);
+	ContainerOverlay->enableDropPreview(ContainerArea != InvalidDockWidgetArea);
+	auto DockArea = TopContainer->dockAreaAt(GlobalPos);
+	if (DockArea && DockArea->isVisible() && VisibleDockAreas > 0)
+	{
+		DockAreaOverlay->enableDropPreview(true);
+		DockAreaOverlay->setAllowedAreas(
+		    (VisibleDockAreas == 1) ? NoDockWidgetArea : AllDockAreas);
+		DockWidgetArea Area = DockAreaOverlay->showOverlay(DockArea);
+
+		// A CenterDockWidgetArea for the dockAreaOverlay() indicates that
+		// the mouse is in the title bar. If the ContainerArea is valid
+		// then we ignore the dock area of the dockAreaOverlay() and disable
+		// the drop preview
+		if ((Area == CenterDockWidgetArea)
+		    && (ContainerArea != InvalidDockWidgetArea))
+		{
+			DockAreaOverlay->enableDropPreview(false);
+			ContainerOverlay->enableDropPreview(true);
+		}
+		else
+		{
+			ContainerOverlay->enableDropPreview(InvalidDockWidgetArea == Area);
+		}
+	}
+	else
+	{
+		DockAreaOverlay->hideOverlay();
 	}
 }
 
-
 //============================================================================
-CFloatingDockContainer::CFloatingDockContainer(CDockManager* DockManager) :
-	QWidget(DockManager, Qt::Window),
+CFloatingDockContainer::CFloatingDockContainer(CDockManager *DockManager) :
+	tFloatingWidgetBase(DockManager),
 	d(new FloatingDockContainerPrivate(this))
 {
 	d->DockManager = DockManager;
-    QBoxLayout* l = new QBoxLayout(QBoxLayout::TopToBottom);
-    l->setContentsMargins(0, 0, 0, 0);
-    l->setSpacing(0);
-    setLayout(l);
+	d->DockContainer = new CDockContainerWidget(DockManager, this);
+	connect(d->DockContainer, SIGNAL(dockAreasAdded()), this,
+	    SLOT(onDockAreasAddedOrRemoved()));
+	connect(d->DockContainer, SIGNAL(dockAreasRemoved()), this,
+	    SLOT(onDockAreasAddedOrRemoved()));
 
-    d->DockContainer = new CDockContainerWidget(DockManager, this);
-    connect(d->DockContainer, SIGNAL(dockAreasAdded()), this, SLOT(onDockAreasAddedOrRemoved()));
-    connect(d->DockContainer, SIGNAL(dockAreasRemoved()), this, SLOT(onDockAreasAddedOrRemoved()));
+#ifdef Q_OS_LINUX
+    d->TitleBar = new CFloatingWidgetTitleBar(this);
+    setWindowFlags(windowFlags() | Qt::Tool);
+    QDockWidget::setWidget(d->DockContainer);
+    QDockWidget::setFloating(true);
+    QDockWidget::setFeatures(QDockWidget::AllDockWidgetFeatures);
+    setTitleBarWidget(d->TitleBar);
+    connect(d->TitleBar, SIGNAL(closeRequested()), SLOT(close()));
+#else
+	setWindowFlags(
+	    Qt::Window | Qt::WindowMaximizeButtonHint | Qt::WindowCloseButtonHint);
+	QBoxLayout *l = new QBoxLayout(QBoxLayout::TopToBottom);
+	l->setContentsMargins(0, 0, 0, 0);
+	l->setSpacing(0);
+	setLayout(l);
 	l->addWidget(d->DockContainer);
+#endif
+
 	DockManager->registerFloatingWidget(this);
 
 	// We install an event filter to detect mouse release events because we
@@ -228,26 +267,30 @@ CFloatingDockContainer::CFloatingDockContainer(CDockManager* DockManager) :
 	qApp->installEventFilter(this);
 }
 
-
 //============================================================================
-CFloatingDockContainer::CFloatingDockContainer(CDockAreaWidget* DockArea) :
+CFloatingDockContainer::CFloatingDockContainer(CDockAreaWidget *DockArea) :
 	CFloatingDockContainer(DockArea->dockManager())
 {
 	d->DockContainer->addDockArea(DockArea);
+#ifdef Q_OS_LINUX
+    d->TitleBar->enableCloseButton(isClosable());
+#endif
 }
 
-
 //============================================================================
-CFloatingDockContainer::CFloatingDockContainer(CDockWidget* DockWidget) :
+CFloatingDockContainer::CFloatingDockContainer(CDockWidget *DockWidget) :
 	CFloatingDockContainer(DockWidget->dockManager())
 {
 	d->DockContainer->addDockWidget(CenterDockWidgetArea, DockWidget);
+#ifdef Q_OS_LINUX
+    d->TitleBar->enableCloseButton(isClosable());
+#endif
 }
 
 //============================================================================
 CFloatingDockContainer::~CFloatingDockContainer()
 {
-	qDebug() << "~CFloatingDockContainer";
+	ADS_PRINT("~CFloatingDockContainer");
 	if (d->DockManager)
 	{
 		d->DockManager->removeFloatingWidget(this);
@@ -255,231 +298,336 @@ CFloatingDockContainer::~CFloatingDockContainer()
 	delete d;
 }
 
-
 //============================================================================
 CDockContainerWidget* CFloatingDockContainer::dockContainer() const
 {
 	return d->DockContainer;
 }
 
-
 //============================================================================
 void CFloatingDockContainer::changeEvent(QEvent *event)
 {
 	QWidget::changeEvent(event);
 	if ((event->type() == QEvent::ActivationChange) && isActiveWindow())
-    {
-		qDebug() << "FloatingWidget::changeEvent QEvent::ActivationChange ";
+	{
+		ADS_PRINT("FloatingWidget::changeEvent QEvent::ActivationChange ");
 		d->zOrderIndex = ++zOrderCounter;
-        return;
-    }
+		return;
+	}
 }
 
-
 //============================================================================
 void CFloatingDockContainer::moveEvent(QMoveEvent *event)
 {
 	QWidget::moveEvent(event);
-	if (!qApp->mouseButtons().testFlag(Qt::LeftButton))
-	{
-		if (d->DraggingActive)
-		{
-			d->setDraggingActive(false);
-		}
-		return;
-	}
-
-	if (d->DraggingActive)
+	switch (d->DraggingState)
 	{
+	case DraggingMousePressed:
+		d->setState(DraggingFloatingWidget);
 		d->updateDropOverlays(QCursor::pos());
+		break;
+
+	case DraggingFloatingWidget:
+		d->updateDropOverlays(QCursor::pos());
+		break;
+	default:
+		break;
 	}
 }
 
-
 //============================================================================
 void CFloatingDockContainer::closeEvent(QCloseEvent *event)
 {
-    qDebug() << "CFloatingDockContainer closeEvent";
-	d->setDraggingActive(false);
+	ADS_PRINT("CFloatingDockContainer closeEvent");
+	d->setState(DraggingInactive);
 
-    if (isClosable())
-        QWidget::closeEvent(event);
-    else
+	if (isClosable())
+	{
+		// In Qt version after 5.9.2 there seems to be a bug that causes the
+		// QWidget::event() function to not receive any NonClientArea mouse
+		// events anymore after a close/show cycle. The bug is reported here:
+		// https://bugreports.qt.io/browse/QTBUG-73295
+		// The following code is a workaround for Qt versions > 5.9.2 that seems
+		// to work
+		// Starting from Qt version 5.12.2 this seems to work again. But
+		// now the QEvent::NonClientAreaMouseButtonPress function returns always
+		// Qt::RightButton even if the left button was pressed
+#ifndef Q_OS_LINUX
+#if (QT_VERSION > QT_VERSION_CHECK(5, 9, 2) && QT_VERSION < QT_VERSION_CHECK(5, 12, 2))
         event->ignore();
+        this->hide();
+#else
+		Super::closeEvent(event);
+#endif
+#else // Q_OS_LINUX
+        Super::closeEvent(event);
+#endif
+	}
+	else
+	{
+		event->ignore();
+	}
 }
 
-
 //============================================================================
 void CFloatingDockContainer::hideEvent(QHideEvent *event)
 {
-    qDebug() << "CFloatingDockContainer hideEvent";
-	QWidget::hideEvent(event);
-	auto OpenDockAreas = d->DockContainer->openedDockAreas();
-	for (auto DockArea : OpenDockAreas)
+	Super::hideEvent(event);
+    // Prevent toogleView() events during restore state
+    if (d->DockManager->isRestoringState())
+    {
+        return;
+    }
+
+	for (auto DockArea : d->DockContainer->openedDockAreas())
 	{
-		auto OpenDockWidgets = DockArea->openedDockWidgets();
-		for (auto DockWidget : OpenDockWidgets)
+		for (auto DockWidget : DockArea->openedDockWidgets())
 		{
 			DockWidget->toggleView(false);
 		}
 	}
 }
 
-
 //============================================================================
 void CFloatingDockContainer::showEvent(QShowEvent *event)
 {
-	QWidget::showEvent(event);
-	CDockContainerWidget* DockContainer = dockContainer();
-	for (int i = 0; i < DockContainer->dockAreaCount(); ++i)
-	{
-		auto DockArea = DockContainer->dockArea(i);
-		for (auto DockWidget : DockArea->openedDockWidgets())
-		{
-			DockWidget->setToggleViewActionChecked(true);
-		}
-	}
+	Super::showEvent(event);
 }
 
-
 //============================================================================
 bool CFloatingDockContainer::event(QEvent *e)
 {
-	if (e->type() == QEvent::NonClientAreaMouseButtonPress)
+	switch (d->DraggingState)
 	{
-		if (QGuiApplication::mouseButtons() == Qt::LeftButton)
+	case DraggingInactive:
+	{
+		// Normally we would check here, if the left mouse button is pressed.
+		// But from QT version 5.12.2 on the mouse events from
+		// QEvent::NonClientAreaMouseButtonPress return the wrong mouse button
+		// The event always returns Qt::RightButton even if the left button
+		// is clicked.
+		// It is really great to work around the whole NonClientMouseArea
+		// bugs
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 2))
+		if (e->type()
+		    == QEvent::NonClientAreaMouseButtonPress /*&& QGuiApplication::mouseButtons().testFlag(Qt::LeftButton)*/)
 		{
-			qDebug() << "FloatingWidget::event Event::NonClientAreaMouseButtonPress" << e->type();
-			d->setDraggingActive(true);
-			d->NonClientAreaMouseButtonPress = true;
+			ADS_PRINT("FloatingWidget::event Event::NonClientAreaMouseButtonPress" << e->type());
+			d->setState(DraggingMousePressed);
 		}
-	}
-	else if (e->type() == QEvent::NonClientAreaMouseButtonDblClick)
-	{
-		qDebug() << "FloatingWidget::event QEvent::NonClientAreaMouseButtonDblClick";
-		d->setDraggingActive(false);
-	}
-	else if ((e->type() == QEvent::NonClientAreaMouseButtonRelease) && d->DraggingActive)
-	{
-		qDebug() << "FloatingWidget::event QEvent::NonClientAreaMouseButtonRelease";
-		d->titleMouseReleaseEvent();
-	}
-	else if (d->NonClientAreaMouseButtonPress && (e->type() == QEvent::Resize))
-	{
-		// If user resizes the floating widget, we do not want to show any
-		// drop overlays or drop overlay icons. If the window is maximized,
-		// then dragging the window via title bar will cause the widget to
-		// leave the maximized state. This in turn will trigger a resize event.
-		// To know, if the resize event was triggered by user via moving a
-		// corner of the window frame or if it was caused by a windows state
-		// change, we check, if we are not in maximized state.
-		if (!isMaximized())
+#else
+		if (e->type() == QEvent::NonClientAreaMouseButtonPress && QGuiApplication::mouseButtons().testFlag(Qt::LeftButton))
 		{
-			d->setDraggingActive(false);
+            ADS_PRINT("FloatingWidget::event Event::NonClientAreaMouseButtonPress" << e->type());
+			d->setState(DraggingMousePressed);
 		}
+#endif
+	}
+		break;
+
+	case DraggingMousePressed:
+		switch (e->type())
+		{
+		case QEvent::NonClientAreaMouseButtonDblClick:
+			ADS_PRINT("FloatingWidget::event QEvent::NonClientAreaMouseButtonDblClick");
+			d->setState(DraggingInactive);
+			break;
+
+		case QEvent::Resize:
+			// If the first event after the mouse press is a resize event, then
+			// the user resizes the window instead of dragging it around.
+			// But there is one exception. If the window is maximized,
+			// then dragging the window via title bar will cause the widget to
+			// leave the maximized state. This in turn will trigger a resize event.
+			// To know, if the resize event was triggered by user via moving a
+			// corner of the window frame or if it was caused by a windows state
+			// change, we check, if we are not in maximized state.
+			if (!isMaximized())
+			{
+				d->setState(DraggingInactive);
+			}
+			break;
+
+		default:
+			break;
+		}
+		break;
+
+	case DraggingFloatingWidget:
+		if (e->type() == QEvent::NonClientAreaMouseButtonRelease)
+		{
+			ADS_PRINT("FloatingWidget::event QEvent::NonClientAreaMouseButtonRelease");
+			d->titleMouseReleaseEvent();
+		}
+		break;
+
+	default:
+		break;
 	}
 
+#if (ADS_DEBUG_LEVEL > 0)
+	qDebug() << "CFloatingDockContainer::event " << e->type();
+#endif
 	return QWidget::event(e);
 }
 
-
 //============================================================================
 bool CFloatingDockContainer::eventFilter(QObject *watched, QEvent *event)
 {
 	Q_UNUSED(watched);
-	if (event->type() == QEvent::MouseButtonRelease && d->DraggingActive)
+	if (event->type() == QEvent::MouseButtonRelease
+	    && d->isState(DraggingFloatingWidget))
 	{
-		qDebug() << "FloatingWidget::eventFilter QEvent::MouseButtonRelease";
+		ADS_PRINT("FloatingWidget::eventFilter QEvent::MouseButtonRelease");
+		finishDragging();
 		d->titleMouseReleaseEvent();
 	}
 
 	return false;
 }
 
-
 //============================================================================
-void CFloatingDockContainer::startFloating(const QPoint& Pos, const QSize& Size)
+void CFloatingDockContainer::startFloating(const QPoint &DragStartMousePos,
+    const QSize &Size, eDragState DragState, QWidget *MouseEventHandler)
 {
+#ifndef Q_OS_LINUX
+	Q_UNUSED(MouseEventHandler)
+#endif
 	resize(Size);
-	d->setDraggingActive(true);
-	QPoint TargetPos = QCursor::pos() - Pos;
-	move(TargetPos);
-    show();
-	d->DragStartMousePosition = Pos;
-}
+	d->setState(DragState);
+	d->DragStartMousePosition = DragStartMousePos;
+#ifdef Q_OS_LINUX
+	// I have not found a way on Linux to display the floating widget behind the
+	// dock overlay. That means if the user drags this floating widget around,
+	// it is always painted in front of the dock overlay and dock overlay cross.
+	// and the user will not see the dock overlay. To work around this issue,
+	// the window opacity is set to 0.6 to make the dock overlay visible
+	// again. If someone has an idea, how to place the dragged floating widget
+	// behind the dock overlay, then a pull request would be welcome.
+	if (DraggingFloatingWidget == DragState)
+	{
+		setAttribute(Qt::WA_X11NetWmWindowTypeDock, true);
+		setWindowOpacity(0.6);
+		d->MouseEventHandler = MouseEventHandler;
+		if (d->MouseEventHandler)
+		{
+			d->MouseEventHandler->grabMouse();
+		}
+	}
+#endif
+	moveFloating();
+	show();
 
+}
 
 //============================================================================
 void CFloatingDockContainer::moveFloating()
 {
 	int BorderSize = (frameSize().width() - size().width()) / 2;
-	const QPoint moveToPos = QCursor::pos() - d->DragStartMousePosition - QPoint(BorderSize, 0);
+	const QPoint moveToPos = QCursor::pos() - d->DragStartMousePosition
+	    - QPoint(BorderSize, 0);
 	move(moveToPos);
 }
 
-
 //============================================================================
 bool CFloatingDockContainer::isClosable() const
 {
-    auto OpenDockAreas = d->DockContainer->openedDockAreas();
-    for (auto DockArea : OpenDockAreas)
-    {
-        auto OpenDockWidgets = DockArea->openedDockWidgets();
-        for (auto DockWidget : OpenDockWidgets)
-        {
-            if (!DockWidget->features().testFlag(CDockWidget::DockWidgetClosable))
-            {
-                return false;
-            }
-        }
-    }
-    return true;
+	return d->DockContainer->features().testFlag(
+	    CDockWidget::DockWidgetClosable);
 }
 
-
 //============================================================================
 void CFloatingDockContainer::onDockAreasAddedOrRemoved()
 {
-	qDebug() << "CFloatingDockContainer::onDockAreasAddedOrRemoved()";
-	if (d->DockContainer->dockAreaCount() == 1)
+	ADS_PRINT("CFloatingDockContainer::onDockAreasAddedOrRemoved()");
+	auto TopLevelDockArea = d->DockContainer->topLevelDockArea();
+	if (TopLevelDockArea)
 	{
-		d->SingleDockArea = d->DockContainer->dockArea(0);
-		this->setWindowTitle(d->SingleDockArea->currentDockWidget()->windowTitle());
+		d->SingleDockArea = TopLevelDockArea;
+		d->setWindowTitle(
+		    d->SingleDockArea->currentDockWidget()->windowTitle());
 		connect(d->SingleDockArea, SIGNAL(currentChanged(int)), this,
-			SLOT(onDockAreaCurrentChanged(int)));
+		    SLOT(onDockAreaCurrentChanged(int)));
 	}
 	else
 	{
 		if (d->SingleDockArea)
 		{
 			disconnect(d->SingleDockArea, SIGNAL(currentChanged(int)), this,
-				SLOT(onDockAreaCurrentChanged(int)));
+			    SLOT(onDockAreaCurrentChanged(int)));
 			d->SingleDockArea = nullptr;
 		}
-		this->setWindowTitle(qApp->applicationDisplayName());
+		d->setWindowTitle(qApp->applicationDisplayName());
 	}
 }
 
+//============================================================================
+void CFloatingDockContainer::updateWindowTitle()
+{
+	auto TopLevelDockArea = d->DockContainer->topLevelDockArea();
+	if (TopLevelDockArea)
+	{
+		d->setWindowTitle(TopLevelDockArea->currentDockWidget()->windowTitle());
+	}
+	else
+	{
+		d->setWindowTitle(qApp->applicationDisplayName());
+	}
+}
 
 //============================================================================
 void CFloatingDockContainer::onDockAreaCurrentChanged(int Index)
 {
 	Q_UNUSED(Index);
-	this->setWindowTitle(d->SingleDockArea->currentDockWidget()->windowTitle());
+	d->setWindowTitle(d->SingleDockArea->currentDockWidget()->windowTitle());
 }
 
-
 //============================================================================
-bool CFloatingDockContainer::restoreState(QXmlStreamReader& Stream, bool Testing)
+bool CFloatingDockContainer::restoreState(QXmlStreamReader &Stream,
+    bool Testing)
 {
 	if (!d->DockContainer->restoreState(Stream, Testing))
 	{
 		return false;
 	}
+
 	onDockAreasAddedOrRemoved();
 	return true;
 }
 
+//============================================================================
+bool CFloatingDockContainer::hasTopLevelDockWidget() const
+{
+	return d->DockContainer->hasTopLevelDockWidget();
+}
+
+//============================================================================
+CDockWidget* CFloatingDockContainer::topLevelDockWidget() const
+{
+	return d->DockContainer->topLevelDockWidget();
+}
+
+//============================================================================
+QList<CDockWidget*> CFloatingDockContainer::dockWidgets() const
+{
+	return d->DockContainer->dockWidgets();
+}
+
+//============================================================================
+void CFloatingDockContainer::finishDragging()
+{
+	ADS_PRINT("CFloatingDockContainer::finishDragging");
+#ifdef Q_OS_LINUX
+   setAttribute(Qt::WA_X11NetWmWindowTypeDock, false);
+   setWindowOpacity(1);
+   activateWindow();
+   if (d->MouseEventHandler)
+   {
+       d->MouseEventHandler->releaseMouse();
+       d->MouseEventHandler = nullptr;
+   }
+#endif
+}
 
 } // namespace ads
 

src/FloatingDockContainer.h

@@ -29,10 +29,16 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include <QWidget>
-
 #include "ads_globals.h"
 
+#ifdef Q_OS_LINUX
+#include <QDockWidget>
+#define tFloatingWidgetBase QDockWidget
+#else
+#include <QWidget>
+#define tFloatingWidgetBase QWidget
+#endif
+
 class QXmlStreamReader;
 
 namespace ads
@@ -47,13 +53,17 @@ class CDockManager;
 class CDockAreaTabBar;
 class CDockWidgetTab;
 struct DockWidgetTabPrivate;
+class CDockAreaTitleBar;
+struct DockAreaTitleBarPrivate;
+class CFloatingWidgetTitleBar;
 
 /**
  * This implements a floating widget that is a dock container that accepts
  * docking of dock widgets like the main window and that can be docked into
- * another dock container
+ * another dock container.
+ * Every floating window of the docking system is a FloatingDockContainer.
  */
-class ADS_EXPORT CFloatingDockContainer : public QWidget
+class ADS_EXPORT CFloatingDockContainer : public tFloatingWidgetBase
 {
 	Q_OBJECT
 private:
@@ -64,6 +74,11 @@ private:
 	friend class CDockAreaTabBar;
 	friend struct DockWidgetTabPrivate;
 	friend class CDockWidgetTab;
+	friend class CDockAreaTitleBar;
+	friend struct DockAreaTitleBarPrivate;
+	friend class CDockWidget;
+	friend class CDockAreaWidget;
+    friend class CFloatingWidgetTitleBar;
 
 private slots:
 	void onDockAreasAddedOrRemoved();
@@ -75,7 +90,32 @@ protected:
 	 * Use moveToGlobalPos() to move the widget to a new position
 	 * depending on the start position given in Pos parameter
 	 */
-	void startFloating(const QPoint& Pos, const QSize& Size = QSize());
+	void startFloating(const QPoint& DragStartMousePos, const QSize& Size,
+        eDragState DragState, QWidget* MouseEventHandler);
+
+	/**
+	 * Call this function to start dragging the floating widget
+	 */
+    void startDragging(const QPoint& DragStartMousePos, const QSize& Size,
+        QWidget* MouseEventHandler)
+	{
+        startFloating(DragStartMousePos, Size, DraggingFloatingWidget, MouseEventHandler);
+	}
+
+	/**
+	 * Call this function if you explecitely want to signal that dragging has
+	 * finished
+	 */
+	void finishDragging();
+
+	/**
+	 * Call this function if you just want to initialize the position
+	 * and size of the floating widget
+	 */
+	void initFloatingGeometry(const QPoint& DragStartMousePos, const QSize& Size)
+	{
+        startFloating(DragStartMousePos, Size, DraggingInactive, nullptr);
+	}
 
 	/**
 	 * Moves the widget to a new position relative to the position given when
@@ -91,6 +131,11 @@ protected:
 	 */
 	bool restoreState(QXmlStreamReader& Stream, bool Testing);
 
+	/**
+	 * Call this function to update the window title
+	 */
+	void updateWindowTitle();
+
 
 protected: // reimplements QWidget
 	virtual void changeEvent(QEvent *event) override;
@@ -102,6 +147,8 @@ protected: // reimplements QWidget
 	virtual bool eventFilter(QObject *watched, QEvent *event) override;
 
 public:
+	using Super = QWidget;
+
 	/**
 	 * Create empty flatingb widget - required for restore state
 	 */
@@ -132,6 +179,28 @@ public:
 	 * It can be closed, if all dock widgets in all dock areas can be closed
 	 */
     bool isClosable() const;
+
+    /**
+     * This function returns true, if this floating widget has only one single
+     * visible dock widget in a single visible dock area.
+     * The single dock widget is a real top level floating widget because no
+     * other widgets are docked.
+     */
+    bool hasTopLevelDockWidget() const;
+
+    /**
+     * This function returns the first dock widget in the first dock area.
+     * If the function hasSingleDockWidget() returns true, then this function
+     * returns this single dock widget.
+     */
+    CDockWidget* topLevelDockWidget() const;
+
+    /**
+     * This function returns a list of all dock widget in this floating widget.
+     * This is a simple convenience function that simply calls the dockWidgets()
+     * function of the internal container widget.
+     */
+    QList<CDockWidget*> dockWidgets() const;
 }; // class FloatingDockContainer
 }
  // namespace ads

src/ads.qrc

@@ -1,5 +1,8 @@
 <RCC>
     <qresource prefix="/ads">
         <file>stylesheets/default.css</file>
+        <file>images/close-button.svg</file>
+        <file>images/close-button-disabled.svg</file>
+        <file>stylesheets/default_linux.css</file>
     </qresource>
 </RCC>

src/ads_globals.cpp

@@ -29,6 +29,7 @@
 //                                   INCLUDES
 //============================================================================
 #include <QVariant>
+#include <QPainter>
 
 #include "DockSplitter.h"
 #include "ads_globals.h"
@@ -39,21 +40,11 @@ namespace ads
 
 namespace internal
 {
-//============================================================================
-QSplitter* newSplitter(Qt::Orientation orientation, QWidget* parent)
-{
-	QSplitter* s = new CDockSplitter(orientation, parent);
-	s->setProperty("ads-splitter", QVariant(true));
-	s->setChildrenCollapsible(false);
-	s->setOpaqueResize(false);
-	return s;
-}
-
 //============================================================================
 void replaceSplitterWidget(QSplitter* Splitter, QWidget* From, QWidget* To)
 {
 	int index = Splitter->indexOf(From);
-	From->setParent(0);
+	From->setParent(nullptr);
 	Splitter->insertWidget(index, To);
 }
 
@@ -73,6 +64,32 @@ CDockInsertParam dockAreaInsertParameters(DockWidgetArea Area)
 	return CDockInsertParam(Qt::Vertical, false);
 }
 
+
+//============================================================================
+QPixmap createTransparentPixmap(const QPixmap& Source, qreal Opacity)
+{
+	QPixmap TransparentPixmap(Source.size());
+	TransparentPixmap.fill(Qt::transparent);
+	QPainter p(&TransparentPixmap);
+	p.setOpacity(Opacity);
+	p.drawPixmap(0, 0, Source);
+	return TransparentPixmap;
+}
+
+
+//============================================================================
+void hideEmptyParentSplitters(CDockSplitter* Splitter)
+{
+	while (Splitter && Splitter->isVisible())
+	{
+		if (!Splitter->hasVisibleContent())
+		{
+			Splitter->hide();
+		}
+		Splitter = internal::findParent<CDockSplitter*>(Splitter);
+	}
+}
+
 } // namespace internal
 } // namespace ads
 

src/ads_globals.h

@@ -32,17 +32,36 @@
 //============================================================================
 #include <QPair>
 #include <QtCore/QtGlobal>
+#include <QPixmap>
+#include <QWidget>
 
+#ifndef ADS_STATIC
 #ifdef ADS_SHARED_EXPORT
 #define ADS_EXPORT Q_DECL_EXPORT
 #else
 #define ADS_EXPORT Q_DECL_IMPORT
 #endif
+#else
+#define ADS_EXPORT
+#endif
+
+// Define ADS_DEBUG_PRINT to enable a lot of debug output
+#ifdef ADS_DEBUG_PRINT
+#define ADS_PRINT(s) qDebug() << s
+#else
+#define ADS_PRINT(s)
+#endif
+
+// Set ADS_DEBUG_LEVEL to enable additional debug output and to enable layout
+// dumps to qDebug and std::cout after layout changes
+#define ADS_DEBUG_LEVEL 0
 
 class QSplitter;
 
 namespace ads
 {
+class CDockSplitter;
+
 enum DockWidgetArea
 {
 	NoDockWidgetArea = 0x00,
@@ -59,20 +78,42 @@ enum DockWidgetArea
 Q_DECLARE_FLAGS(DockWidgetAreas, DockWidgetArea)
 
 
-namespace internal
+enum TitleBarButton
 {
-
+	TitleBarButtonTabsMenu,
+	TitleBarButtonUndock,
+	TitleBarButtonClose
+};
 
 /**
- * Helper function to create new splitter widgets
+ * The different dragging states
  */
-QSplitter* newSplitter(Qt::Orientation orientation, QWidget* parent = 0);
+enum eDragState
+{
+	DraggingInactive,     //!< DraggingInactive
+	DraggingMousePressed, //!< DraggingMousePressed
+	DraggingTab,          //!< DraggingTab
+	DraggingFloatingWidget//!< DraggingFloatingWidget
+};
+
+namespace internal
+{
+static const bool RestoreTesting = true;
+static const bool Restore = false;
+static const char* const ClosedProperty = "close";
+static const char* const DirtyProperty = "dirty";
 
 /**
  * Replace the from widget in the given splitter with the To widget
  */
 void replaceSplitterWidget(QSplitter* Splitter, QWidget* From, QWidget* To);
 
+/**
+ * This function walks the splitter tree upwards to hides all splitters
+ * that do not have visible content
+ */
+void hideEmptyParentSplitters(CDockSplitter* FirstParentSplitter);
+
 /**
  * Convenience class for QPair to provide better naming than first and
  * second
@@ -95,6 +136,10 @@ CDockInsertParam dockAreaInsertParameters(DockWidgetArea Area);
  * Searches for the parent widget of the given type.
  * Returns the parent widget of the given widget or 0 if the widget is not
  * child of any widget of type T
+ *
+ * It is not safe to use this function in in CDockWidget because only
+ * the current dock widget has a parent. All dock widgets that are not the
+ * current dock widget in a dock area have no parent.
  */
 template <class T>
 T findParent(const QWidget* w)
@@ -102,7 +147,7 @@ T findParent(const QWidget* w)
 	QWidget* parentWidget = w->parentWidget();
 	while (parentWidget)
 	{
-		T ParentImpl = dynamic_cast<T>(parentWidget);
+		T ParentImpl = qobject_cast<T>(parentWidget);
 		if (ParentImpl)
 		{
 			return ParentImpl;
@@ -112,6 +157,34 @@ T findParent(const QWidget* w)
 	return 0;
 }
 
+/**
+ * Creates a semi transparent pixmap from the given pixmap Source.
+ * The Opacity parameter defines the opacity from completely transparent (0.0)
+ * to completely opaque (1.0)
+ */
+QPixmap createTransparentPixmap(const QPixmap& Source, qreal Opacity);
+
+
+/**
+ * Helper function for settings flags in a QFlags instance.
+ */
+template <class T>
+void setFlag(T& Flags, typename T::enum_type flag, bool on = true)
+{
+#if QT_VERSION >= 0x050700
+	Flags.setFlag(flag, on);
+#else
+    if(on)
+    {
+        Flags |= flag;
+    }
+    else
+    {
+        Flags &= ~flag;
+    }
+#endif
+}
+
 } // namespace internal
 } // namespace ads
 

src/images/close-button-disabled.svg

@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Capa_1"
+   x="0px"
+   y="0px"
+   width="512"
+   height="512"
+   viewBox="0 0 512 512"
+   xml:space="preserve"
+   sodipodi:docname="close-button-disabled.svg"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"><metadata
+   id="metadata897"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
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+   id="defs895" /><sodipodi:namedview
+   pagecolor="#ffffff"
+   bordercolor="#666666"
+   borderopacity="1"
+   objecttolerance="10"
+   gridtolerance="10"
+   guidetolerance="10"
+   inkscape:pageopacity="0"
+   inkscape:pageshadow="2"
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+   fit-margin-top="0"
+   fit-margin-left="0"
+   fit-margin-right="0"
+   fit-margin-bottom="0"
+   inkscape:zoom="0.85862966"
+   inkscape:cx="345.29142"
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+   inkscape:window-x="-8"
+   inkscape:window-y="-8"
+   inkscape:window-maximized="1"
+   inkscape:current-layer="Capa_1" />
+<g
+   id="g860"
+   transform="matrix(0.71708683,0,0,0.71708683,128,128)"
+   style="stroke:none;stroke-opacity:1;fill:#000000;fill-opacity:0.50196081">
+	<g
+   id="close"
+   style="stroke:none;stroke-opacity:1;fill:#000000;fill-opacity:0.50196081">
+		<polygon
+   points="357,321.3 214.2,178.5 357,35.7 321.3,0 178.5,142.8 35.7,0 0,35.7 142.8,178.5 0,321.3 35.7,357 178.5,214.2 321.3,357 "
+   id="polygon857"
+   style="stroke:none;stroke-opacity:1;fill:#000000;fill-opacity:0.50196081" />
+	</g>
+</g>
+<g
+   id="g862"
+   transform="translate(0,155)">
+</g>
+<g
+   id="g864"
+   transform="translate(0,155)">
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+   transform="translate(0,155)">
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+   id="g868"
+   transform="translate(0,155)">
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+   id="g870"
+   transform="translate(0,155)">
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+   id="g872"
+   transform="translate(0,155)">
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+   id="g874"
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+   id="g876"
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+   id="g878"
+   transform="translate(0,155)">
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+   id="g880"
+   transform="translate(0,155)">
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+   transform="translate(0,155)">
+</g>
+<g
+   id="g890"
+   transform="translate(0,155)">
+</g>
+</svg>

src/images/close-button.svg

@@ -0,0 +1,119 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="Capa_1"
+   x="0px"
+   y="0px"
+   width="512"
+   height="512"
+   viewBox="0 0 512 512"
+   xml:space="preserve"
+   sodipodi:docname="close-button.svg"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)"><metadata
+   id="metadata897"><rdf:RDF><cc:Work
+       rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+         rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+   id="defs895" /><sodipodi:namedview
+   pagecolor="#ffffff"
+   bordercolor="#666666"
+   borderopacity="1"
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+   gridtolerance="10"
+   guidetolerance="10"
+   inkscape:pageopacity="0"
+   inkscape:pageshadow="2"
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+   id="namedview893"
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+</svg>

src/linux/FloatingWidgetTitleBar.cpp

@@ -0,0 +1,183 @@
+/*******************************************************************************
+ ** Qt Advanced Docking System
+ ** Copyright (C) 2017 Uwe Kindler
+ **
+ ** This library is free software; you can redistribute it and/or
+ ** modify it under the terms of the GNU Lesser General Public
+ ** License as published by the Free Software Foundation; either
+ ** version 2.1 of the License, or (at your option) any later version.
+ **
+ ** This library is distributed in the hope that it will be useful,
+ ** but WITHOUT ANY WARRANTY; without even the implied warranty of
+ ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ ** Lesser General Public License for more details.
+ **
+ ** You should have received a copy of the GNU Lesser General Public
+ ** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+ ******************************************************************************/
+
+//============================================================================
+/// \file   FloatingWidgetTitleBar.cpp
+/// \author Uwe Kindler
+/// \date   13.05.2019
+/// \brief  Implementation of CFloatingWidgetTitleBar class
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "FloatingWidgetTitleBar.h"
+
+#include <iostream>
+
+#include <QHBoxLayout>
+#include <QPushButton>
+#include <QToolButton>
+#include <QPixmap>
+#include <QStyle>
+#include <QMouseEvent>
+
+#include "ads_globals.h"
+#include "ElidingLabel.h"
+#include "FloatingDockContainer.h"
+
+namespace ads
+{
+
+using tTabLabel = CElidingLabel;
+using tCloseButton = QPushButton;
+
+/**
+ * @brief Private data class of public interface CFloatingWidgetTitleBar
+ */
+struct FloatingWidgetTitleBarPrivate
+{
+	CFloatingWidgetTitleBar *_this; ///< public interface class
+	QLabel *IconLabel = nullptr;
+	tTabLabel *TitleLabel;
+	tCloseButton *CloseButton = nullptr;
+	CFloatingDockContainer *FloatingWidget = nullptr;
+	eDragState DragState = DraggingInactive;
+
+	FloatingWidgetTitleBarPrivate(CFloatingWidgetTitleBar *_public) :
+		_this(_public)
+	{
+	}
+
+	/**
+	 * Creates the complete layout including all controls
+	 */
+	void createLayout();
+};
+
+//============================================================================
+void FloatingWidgetTitleBarPrivate::createLayout()
+{
+	TitleLabel = new tTabLabel();
+	TitleLabel->setElideMode(Qt::ElideRight);
+	TitleLabel->setText("DockWidget->windowTitle()");
+	TitleLabel->setObjectName("floatingTitleLabel");
+	TitleLabel->setAlignment(Qt::AlignLeft);
+
+	CloseButton = new tCloseButton();
+	CloseButton->setObjectName("floatingTitleCloseButton");
+	CloseButton->setFlat(true);
+
+	// The standard icons do does not look good on high DPI screens
+	QIcon CloseIcon;
+	QPixmap normalPixmap = _this->style()->standardPixmap(
+	    QStyle::SP_TitleBarCloseButton, 0, CloseButton);
+	CloseIcon.addPixmap(normalPixmap, QIcon::Normal);
+	CloseIcon.addPixmap(internal::createTransparentPixmap(normalPixmap, 0.25),
+	    QIcon::Disabled);
+	CloseButton->setIcon(
+	    _this->style()->standardIcon(QStyle::SP_TitleBarCloseButton));
+	CloseButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+	CloseButton->setVisible(true);
+	CloseButton->setFocusPolicy(Qt::NoFocus);
+	_this->connect(CloseButton, SIGNAL(clicked()), SIGNAL(closeRequested()));
+
+	QFontMetrics fm(TitleLabel->font());
+	int Spacing = qRound(fm.height() / 4.0);
+
+	// Fill the layout
+	QBoxLayout *Layout = new QBoxLayout(QBoxLayout::LeftToRight);
+	Layout->setContentsMargins(6, 0, 0, 0);
+	Layout->setSpacing(0);
+	_this->setLayout(Layout);
+	Layout->addWidget(TitleLabel, 1);
+	Layout->addSpacing(Spacing);
+	Layout->addWidget(CloseButton);
+	Layout->setAlignment(Qt::AlignCenter);
+
+	TitleLabel->setVisible(true);
+}
+
+//============================================================================
+CFloatingWidgetTitleBar::CFloatingWidgetTitleBar(CFloatingDockContainer *parent) :
+	QWidget(parent),
+	d(new FloatingWidgetTitleBarPrivate(this))
+{
+	d->FloatingWidget = parent;
+	d->createLayout();
+}
+
+//============================================================================
+CFloatingWidgetTitleBar::~CFloatingWidgetTitleBar()
+{
+	delete d;
+}
+
+//============================================================================
+void CFloatingWidgetTitleBar::mousePressEvent(QMouseEvent *ev)
+{
+	if (ev->button() == Qt::LeftButton)
+	{
+		d->DragState = DraggingFloatingWidget;
+		d->FloatingWidget->startDragging(ev->pos(), d->FloatingWidget->size(),
+		    this);
+		return;
+	}
+	Super::mousePressEvent(ev);
+}
+
+//============================================================================
+void CFloatingWidgetTitleBar::mouseReleaseEvent(QMouseEvent *ev)
+{
+	d->DragState = DraggingInactive;
+	Super::mouseReleaseEvent(ev);
+}
+
+//============================================================================
+void CFloatingWidgetTitleBar::mouseMoveEvent(QMouseEvent *ev)
+{
+	if (!(ev->buttons() & Qt::LeftButton) || DraggingInactive == d->DragState)
+	{
+		d->DragState = DraggingInactive;
+		Super::mouseMoveEvent(ev);
+		return;
+	}
+
+	// move floating window
+	if (DraggingFloatingWidget == d->DragState)
+	{
+		d->FloatingWidget->moveFloating();
+		Super::mouseMoveEvent(ev);
+		return;
+	}
+	Super::mouseMoveEvent(ev);
+}
+
+//============================================================================
+void CFloatingWidgetTitleBar::enableCloseButton(bool Enable)
+{
+	d->CloseButton->setEnabled(Enable);
+}
+
+//============================================================================
+void CFloatingWidgetTitleBar::setTitle(const QString &Text)
+{
+	d->TitleLabel->setText(Text);
+}
+
+} // namespace ads

src/linux/FloatingWidgetTitleBar.h

@@ -0,0 +1,85 @@
+#ifndef FLOATINGWIDGETTITLEBAR_H
+#define FLOATINGWIDGETTITLEBAR_H
+/*******************************************************************************
+** Qt Advanced Docking System
+** Copyright (C) 2017 Uwe Kindler
+**
+** This library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Lesser General Public
+** License as published by the Free Software Foundation; either
+** version 2.1 of the License, or (at your option) any later version.
+**
+** This library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public
+** License along with this library; If not, see <http://www.gnu.org/licenses/>.
+******************************************************************************/
+
+
+//============================================================================
+/// \file   FloatingWidgetTitleBar.h
+/// \author Uwe Kindler
+/// \date   13.05.2019
+/// \brief  Declaration of CFloatingWidgetTitleBar class
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <QWidget>
+
+namespace ads
+{
+class CFloatingDockContainer;
+
+struct FloatingWidgetTitleBarPrivate;
+
+
+/**
+ * Titlebar for floating widgets to capture non client are mouse events.
+ * Linux does not support NonClieantArea mouse events like
+ * QEvent::NonClientAreaMouseButtonPress. Because these events are required
+ * for the docking system to work properly, we use our own titlebar here to
+ * capture the required mouse events.
+ */
+class CFloatingWidgetTitleBar : public QWidget
+{
+	Q_OBJECT
+private:
+	FloatingWidgetTitleBarPrivate *d; ///< private data (pimpl)
+
+protected:
+	virtual void mousePressEvent(QMouseEvent *ev) override;
+	virtual void mouseReleaseEvent(QMouseEvent *ev) override;
+	virtual void mouseMoveEvent(QMouseEvent *ev) override;
+
+public:
+	using Super = QWidget;
+	explicit CFloatingWidgetTitleBar(CFloatingDockContainer *parent = nullptr);
+
+	/**
+	 * Virtual Destructor
+	 */
+	virtual ~CFloatingWidgetTitleBar();
+
+	/**
+	 * Enables / disables the window close button.
+	 */
+	void enableCloseButton(bool Enable);
+
+	/**
+	 * Sets the window title, that means, the text of the internal tile label.
+	 */
+	void setTitle(const QString &Text);
+
+signals:
+	/**
+	 * This signal is emitted, if the close button is clicked.
+	 */
+	void closeRequested();
+};
+} // namespace ads
+#endif // FLOATINGWIDGETTITLEBAR_H

src/src.pro

@@ -1,26 +1,24 @@
-ADS_ROOT = $${PWD}/..
 ADS_OUT_ROOT = $${OUT_PWD}/..
-
-TARGET = $$qtLibraryTarget(AdvancedDockingSystem)
+CONFIG += c++14
+CONFIG += debug_and_release
+TARGET = $$qtLibraryTarget(qtadvanceddocking)
+DEFINES += QT_DEPRECATED_WARNINGS
 TEMPLATE = lib
 DESTDIR = $${ADS_OUT_ROOT}/lib
 QT += core gui widgets
 
-CONFIG += adsBuildShared
-
-
-adsBuildShared {
+!adsBuildStatic {
 	CONFIG += shared
     DEFINES += ADS_SHARED_EXPORT
 }
-!adsBuildShared {
+adsBuildStatic {
 	CONFIG += staticlib
+    DEFINES += ADS_STATIC
 }
 
 windows {
 	# MinGW
 	*-g++* {
-		QMAKE_CXXFLAGS += -std=c++11
 		QMAKE_CXXFLAGS += -Wall -Wextra -pedantic
 	}
 	# MSVC
@@ -40,10 +38,11 @@ HEADERS += \
     DockWidgetTab.h \
     FloatingDockContainer.h \
     DockOverlay.h \
-    DockSplitter.h
-    
-    
-    
+    DockSplitter.h \
+    DockAreaTitleBar.h \
+    ElidingLabel.h
+
+
 SOURCES += \
     ads_globals.cpp \
     DockAreaWidget.cpp \
@@ -54,4 +53,23 @@ SOURCES += \
     DockWidgetTab.cpp \
     FloatingDockContainer.cpp \
     DockOverlay.cpp \
-    DockSplitter.cpp
+    DockSplitter.cpp \
+    DockAreaTitleBar.cpp \
+    ElidingLabel.cpp
+
+
+unix {
+HEADERS += linux/FloatingWidgetTitleBar.h
+SOURCES += linux/FloatingWidgetTitleBar.cpp
+}
+
+isEmpty(PREFIX){
+	PREFIX=..\installed
+	warning("Install Prefix not set")
+}
+headers.path=$$PREFIX/include
+headers.files=$$HEADERS
+target.path=$$PREFIX/lib
+INSTALLS += headers target
+
+DISTFILES +=

src/stylesheets/default.css

@@ -25,18 +25,20 @@ ads--CDockAreaWidget #tabsMenuButton::menu-indicator
     image: none;
 }
 
+
 ads--CDockWidgetTab
 {
     background: palette(window);
     border-color: palette(light);
     border-style: solid;
     border-width: 0 1px 0 0;
-    padding: 0 9px;
+    padding: 0 0px;
 }
 
 ads--CDockWidgetTab[activeTab="true"]
 {
     background: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:0.5, stop:0 palette(window), stop:1 palette(light));
+    /*background: palette(highlight);*/
 }
 
 ads--CDockWidgetTab QLabel
@@ -57,10 +59,38 @@ ads--CDockWidget
     border-width: 1px 0 0 0;
 }
 
-QPushButton#closeButton,
-QPushButton#tabsMenuButton
+#tabsMenuButton,
+#closeButton,
+#undockButton
 {
-	padding: 2px;
+	padding: 0px -2px;
+}
+
+
+QScrollArea#dockWidgetScrollArea
+{
+	padding: 0px;
+	border: none;
+}
+
+
+#tabCloseButton
+{
+	margin-top: 2px;
+	background: none;
+	border: none;
+	padding: 0px -2px;
+}
+
+#tabCloseButton:hover
+{
+	border: 1px solid rgba(0, 0, 0, 32);
+	background: rgba(0, 0, 0, 16);
+}
+
+#tabCloseButton:pressed
+{
+	background: rgba(0, 0, 0, 32);
 }
 
 

src/stylesheets/default_linux.css

@@ -0,0 +1,96 @@
+
+/*
+ * Default style sheet on Windows Platforms
+ * Note: Always use CSS-classes with and without "ads--" namespace to support Qt4 & Qt5
+ */
+
+ads--CDockContainerWidget
+{
+    background: palette(dark);
+}
+
+ads--CDockContainerWidget QSplitter::handle
+{
+    background: palette(dark);
+}
+
+ads--CDockAreaWidget
+{
+    background: palette(window);
+    border: 1px solid white;
+}
+
+ads--CDockAreaWidget #tabsMenuButton::menu-indicator
+{
+    image: none;
+}
+
+
+ads--CDockWidgetTab
+{
+    background: palette(window);
+    border-color: palette(light);
+    border-style: solid;
+    border-width: 0 1px 0 0;
+    padding: 0 0px;
+}
+
+ads--CDockWidgetTab[activeTab="true"]
+{
+    background: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:0.5, stop:0 palette(window), stop:1 palette(light));
+    /*background: palette(highlight);*/
+}
+
+ads--CDockWidgetTab QLabel
+{
+    color: palette(dark);
+}
+
+ads--CDockWidgetTab[activeTab="true"] QLabel
+{
+    color: palette(foreground);
+}
+
+ads--CDockWidget
+{
+    background: palette(light);
+    border-color: palette(light);
+    border-style: solid;
+    border-width: 1px 0 0 0;
+}
+
+#tabsMenuButton,
+#closeButton,
+#undockButton
+{
+	padding: 0px -2px;
+}
+
+
+QScrollArea#dockWidgetScrollArea
+{
+	padding: 0px;
+	border: none;
+}
+
+
+#tabCloseButton
+{
+        margin-top: 2px;
+        background: none;
+        border: none;
+        padding: 0px -2px;
+}
+
+#tabCloseButton:hover
+{
+        border: 1px solid rgba(0, 0, 0, 32);
+        background: rgba(0, 0, 0, 16);
+}
+
+#tabCloseButton:pressed
+{
+        background: rgba(0, 0, 0, 32);
+}
+
+