Merge branch 'master' of https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System

This allows to subscribe to events of the newly created window.
A common use case is to show a message box if a dock container with many modified documents in it is closed. This allows for the user to decide whether he wants to save / discard all the changes or cancel the closing of the window.

CMakeLists.txt

@@ -42,6 +42,7 @@ set(ads_SRCS
     src/FloatingDockContainer.cpp
 	src/FloatingDragPreview.cpp
 	src/IconProvider.cpp
+	src/DockComponentsFactory.cpp
     src/ads.qrc
     src/linux/FloatingWidgetTitleBar.cpp
 )
@@ -61,6 +62,7 @@ set(ads_INSTALL_INCLUDE
     src/FloatingDockContainer.h
 	src/FloatingDragPreview.h
 	src/IconProvider.h
+	src/DockComponentsFactory.h
     src/linux/FloatingWidgetTitleBar.h
 )
 if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")

demo/MainWindow.cpp

@@ -73,6 +73,8 @@
 #include "DockAreaTitleBar.h"
 #include "DockAreaTabBar.h"
 #include "FloatingDockContainer.h"
+#include "DockComponentsFactory.h"
+
 
 
 //============================================================================
@@ -142,6 +144,25 @@ static QIcon svgIcon(const QString& File)
 }
 
 
+//============================================================================
+class CCustomComponentsFactory : public ads::CDockComponentsFactory
+{
+public:
+	using Super = ads::CDockComponentsFactory;
+	ads::CDockAreaTitleBar* createDockAreaTitleBar(ads::CDockAreaWidget* DockArea) const override
+	{
+		auto TitleBar = new ads::CDockAreaTitleBar(DockArea);
+		auto CustomButton = new QToolButton(DockArea);
+		CustomButton->setToolTip(QObject::tr("Help"));
+		CustomButton->setIcon(svgIcon(":/adsdemo/images/help_outline.svg"));
+		CustomButton->setAutoRaise(true);
+		int Index = TitleBar->indexOf(TitleBar->button(ads::TitleBarButtonTabsMenu));
+		TitleBar->insertWidget(Index + 1, CustomButton);
+		return TitleBar;
+	}
+};
+
+
 //============================================================================
 static ads::CDockWidget* createCalendarDockWidget(QMenu* ViewMenu)
 {
@@ -202,28 +223,29 @@ static ads::CDockWidget* createEditorWidget(QMenu* ViewMenu)
 	return DockWidget;
 }
 
+
 //============================================================================
 static ads::CDockWidget* createTableWidget(QMenu* ViewMenu)
 {
-   static int TableCount = 0;
-   QTableWidget* w = new QTableWidget();
-   ads::CDockWidget* DockWidget = new ads::CDockWidget(QString("Table %1").arg(TableCount++));
-   static int colCount = 5;
-   static int rowCount = 30;
-   w->setColumnCount(colCount);
-   w->setRowCount(rowCount);
-   for (int col = 0; col < colCount; ++col)
-   {
-      w->setHorizontalHeaderItem(col, new QTableWidgetItem(QString("Col %1").arg(col+1)));
-      for (int row = 0; row < rowCount; ++row)
-      {
-         w->setItem(row, col, new QTableWidgetItem(QString("T %1-%2").arg(row + 1).arg(col+1)));
-      }
-   }
-   DockWidget->setWidget(w);
-   DockWidget->setIcon(svgIcon(":/adsdemo/images/grid_on.svg"));
-   ViewMenu->addAction(DockWidget->toggleViewAction());
-   return DockWidget;
+	static int TableCount = 0;
+	QTableWidget* w = new QTableWidget();
+	ads::CDockWidget* DockWidget = new ads::CDockWidget(QString("Table %1").arg(TableCount++));
+	static int colCount = 5;
+	static int rowCount = 30;
+	w->setColumnCount(colCount);
+	w->setRowCount(rowCount);
+	for (int col = 0; col < colCount; ++col)
+	{
+	  w->setHorizontalHeaderItem(col, new QTableWidgetItem(QString("Col %1").arg(col+1)));
+	  for (int row = 0; row < rowCount; ++row)
+	  {
+		 w->setItem(row, col, new QTableWidgetItem(QString("T %1-%2").arg(row + 1).arg(col+1)));
+	  }
+	}
+	DockWidget->setWidget(w);
+	DockWidget->setIcon(svgIcon(":/adsdemo/images/grid_on.svg"));
+	ViewMenu->addAction(DockWidget->toggleViewAction());
+	return DockWidget;
 }
 
 
@@ -309,6 +331,8 @@ void MainWindowPrivate::createContent()
 	auto ToolBar = FileSystemWidget->createDefaultToolBar();
 	ToolBar->addAction(ui.actionSaveState);
 	ToolBar->addAction(ui.actionRestoreState);
+	FileSystemWidget->setFeature(ads::CDockWidget::DockWidgetFloatable, false);
+	appendFeaturStringToWindowTitle(FileSystemWidget);
 	DockManager->addDockWidget(ads::BottomDockWidgetArea, FileSystemWidget);
 
 	FileSystemWidget = createFileSystemTreeDockWidget(ViewMenu);
@@ -318,9 +342,13 @@ void MainWindowPrivate::createContent()
 	FileSystemWidget->setFeature(ads::CDockWidget::DockWidgetMovable, false);
 	FileSystemWidget->setFeature(ads::CDockWidget::DockWidgetFloatable, false);
 	appendFeaturStringToWindowTitle(FileSystemWidget);
-	auto TopDockArea = DockManager->addDockWidget(ads::TopDockWidgetArea, FileSystemWidget);
 
-	// We create a calender widget and clear all flags to prevent the dock area
+	// Test custom factory - we inject a help button into the title bar
+	ads::CDockComponentsFactory::setFactory(new CCustomComponentsFactory());
+	auto TopDockArea = DockManager->addDockWidget(ads::TopDockWidgetArea, FileSystemWidget);
+	ads::CDockComponentsFactory::resetDefaultFactory();
+
+	// We create a calendar widget and clear all flags to prevent the dock area
 	// from closing
 	DockWidget = createCalendarDockWidget(ViewMenu);
 	DockWidget->setFeature(ads::CDockWidget::DockWidgetClosable, false);
@@ -458,9 +486,9 @@ CMainWindow::CMainWindow(QWidget *parent) :
 	// a QToolButton instead of a QPushButton
 	// CDockManager::setConfigFlags(CDockManager::configFlags() | CDockManager::TabCloseButtonIsToolButton);
 
-    // comment the following line if you want to use opaque undocking and
+    // uncomment the following line if you want to use opaque undocking and
 	// opaque splitter resizing
-    CDockManager::setConfigFlags(CDockManager::DefaultNonOpaqueConfig);
+    // CDockManager::setConfigFlags(CDockManager::DefaultOpaqueConfig);
 
     // uncomment the following line if you want a fixed tab width that does
 	// not change if the visibility of the close button changes
@@ -481,6 +509,12 @@ CMainWindow::CMainWindow(QWidget *parent) :
 	// uncomment the following line if you want to show tabs menu button on DockArea's title bar only when there are more than one tab and at least of them has elided title
 	//CDockManager::setConfigFlag(CDockManager::DockAreaDynamicTabsMenuButtonVisibility, true);
 
+	// uncomment the following line if you want floating container to always show application title instead of active dock widget's title
+	//CDockManager::setConfigFlag(CDockManager::FloatingContainerHasWidgetTitle, false);
+
+	// uncomment the following line if you want floating container to show active dock widget's icon instead of always showing application icon
+	//CDockManager::setConfigFlag(CDockManager::FloatingContainerHasWidgetIcon, true);
+
 	// Now create the dock manager and its content
 	d->DockManager = new CDockManager(this);
 

demo/demo.qrc

@@ -12,5 +12,6 @@
         <file>images/custom-menu-button.svg</file>
         <file>app.css</file>
         <file>images/plus.svg</file>
+        <file>images/help_outline.svg</file>
     </qresource>
 </RCC>

demo/images/help_outline.svg

@@ -0,0 +1,6 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0,0,1024,1024">
+	<desc>help_outline icon - Licensed under Apache License v2.0 (http://www.apache.org/licenses/LICENSE-2.0) - Created with Iconfu.com - Derivative work of Material icons (Copyright Google Inc.)</desc>
+	<g fill="#03b8e5" fill-rule="nonzero" style="mix-blend-mode: normal">
+		<path d="M938.67,512c0,235.52 -191.15,426.67 -426.67,426.67c-235.52,0 -426.67,-191.15 -426.67,-426.67c0,-235.52 191.15,-426.67 426.67,-426.67c235.52,0 426.67,191.15 426.67,426.67zM853.33,512c0,-188.16 -153.17,-341.33 -341.33,-341.33c-188.16,0 -341.33,153.17 -341.33,341.33c0,188.16 153.17,341.33 341.33,341.33c188.16,0 341.33,-153.17 341.33,-341.33zM682.67,426.67c0,106.67 -128,117.33 -128,213.33h-85.34c0,-138.67 128,-128 128,-213.33c0,-46.93 -38.4,-85.34 -85.33,-85.34c-46.93,0 -85.33,38.41 -85.33,85.34h-85.34c0,-94.29 76.38,-170.67 170.67,-170.67c94.29,0 170.67,76.38 170.67,170.67zM469.33,682.67h85.34v85.33h-85.34z"/>
+	</g>
+</svg>

src/DockAreaTitleBar.cpp

@@ -49,6 +49,7 @@
 #include "DockWidgetTab.h"
 #include "DockAreaTabBar.h"
 #include "IconProvider.h"
+#include "DockComponentsFactory.h"
 
 #include <iostream>
 
@@ -234,7 +235,7 @@ void DockAreaTitleBarPrivate::createButtons()
 #endif
 	_this->connect(TabsMenu, SIGNAL(aboutToShow()), SLOT(onTabsMenuAboutToShow()));
 	TabsMenuButton->setMenu(TabsMenu);
-	internal::setToolTip(TabsMenuButton, QObject::tr("List all tabs"));
+	internal::setToolTip(TabsMenuButton, QObject::tr("List All Tabs"));
 	TabsMenuButton->setSizePolicy(ButtonSizePolicy);
 	Layout->addWidget(TabsMenuButton, 0);
 	_this->connect(TabsMenuButton->menu(), SIGNAL(triggered(QAction*)),
@@ -273,7 +274,7 @@ void DockAreaTitleBarPrivate::createButtons()
 //============================================================================
 void DockAreaTitleBarPrivate::createTabBar()
 {
-	TabBar = new CDockAreaTabBar(DockArea);
+	TabBar = componentsFactory()->createDockAreaTabBar(DockArea);
     TabBar->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred);
 	Layout->addWidget(TabBar);
 	_this->connect(TabBar, SIGNAL(tabClosed(int)), SLOT(markTabsMenuOutdated()));
@@ -599,7 +600,11 @@ void CDockAreaTitleBar::mouseMoveEvent(QMouseEvent* ev)
 
 	// 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))
+	// If we do non opaque undocking, then we can create the floating drag
+	// preview if the dock widget is movable
+	auto Features = d->DockArea->features();
+    if (!Features.testFlag(CDockWidget::DockWidgetFloatable)
+    && !(Features.testFlag(CDockWidget::DockWidgetMovable) && !CDockManager::testConfigFlag(CDockManager::OpaqueUndocking)))
 	{
 		return;
 	}

src/DockAreaWidget.cpp

@@ -28,9 +28,10 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include "DockWidgetTab.h"
 #include "DockAreaWidget.h"
 
+#include <iostream>
+
 #include <QStackedLayout>
 #include <QScrollBar>
 #include <QScrollArea>
@@ -53,8 +54,8 @@
 #include "DockAreaTabBar.h"
 #include "DockSplitter.h"
 #include "DockAreaTitleBar.h"
-
-#include <iostream>
+#include "DockComponentsFactory.h"
+#include "DockWidgetTab.h"
 
 
 namespace ads
@@ -262,7 +263,7 @@ struct DockAreaWidgetPrivate
 	 */
 	CDockWidget* dockWidgetAt(int index)
 	{
-		return dynamic_cast<CDockWidget*>(ContentsLayout->widget(index));
+		return qobject_cast<CDockWidget*>(ContentsLayout->widget(index));
 	}
 
 	/**
@@ -317,7 +318,7 @@ DockAreaWidgetPrivate::DockAreaWidgetPrivate(CDockAreaWidget* _public) :
 //============================================================================
 void DockAreaWidgetPrivate::createTitleBar()
 {
-	TitleBar = new CDockAreaTitleBar(_this);
+	TitleBar = componentsFactory()->createDockAreaTitleBar(_this);
 	Layout->addWidget(TitleBar);
 	QObject::connect(tabBar(), &CDockAreaTabBar::tabCloseRequested, _this, &CDockAreaWidget::onTabCloseRequested);
 	QObject::connect(TitleBar, &CDockAreaTitleBar::tabBarClicked, _this, &CDockAreaWidget::setCurrentIndex);

src/DockComponentsFactory.cpp

@@ -0,0 +1,69 @@
+//============================================================================
+/// \file   DockComponentsFactory.cpp
+/// \author Uwe Kindler
+/// \date   10.02.2020
+/// \brief  Implementation of DockComponentsFactory
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <DockComponentsFactory.h>
+
+#include <memory>
+
+#include "DockWidgetTab.h"
+#include "DockAreaTabBar.h"
+#include "DockAreaTitleBar.h"
+#include "DockWidget.h"
+#include "DockAreaWidget.h"
+
+namespace ads
+{
+static std::unique_ptr<CDockComponentsFactory> DefaultFactory(new CDockComponentsFactory());
+
+
+//============================================================================
+CDockWidgetTab* CDockComponentsFactory::createDockWidgetTab(CDockWidget* DockWidget) const
+{
+	return new CDockWidgetTab(DockWidget);
+}
+
+
+//============================================================================
+CDockAreaTabBar* CDockComponentsFactory::createDockAreaTabBar(CDockAreaWidget* DockArea) const
+{
+	return new CDockAreaTabBar(DockArea);
+}
+
+
+//============================================================================
+CDockAreaTitleBar* CDockComponentsFactory::createDockAreaTitleBar(CDockAreaWidget* DockArea) const
+{
+	return new CDockAreaTitleBar(DockArea);
+}
+
+
+//============================================================================
+const CDockComponentsFactory* CDockComponentsFactory::factory()
+{
+	return DefaultFactory.get();
+}
+
+
+//============================================================================
+void CDockComponentsFactory::setFactory(CDockComponentsFactory* Factory)
+{
+	DefaultFactory.reset(Factory);
+}
+
+
+//============================================================================
+void CDockComponentsFactory::resetDefaultFactory()
+{
+	DefaultFactory.reset(new CDockComponentsFactory());
+}
+} // namespace ads
+
+//---------------------------------------------------------------------------
+// EOF DockComponentsFactory.cpp

src/DockComponentsFactory.h

@@ -0,0 +1,90 @@
+#ifndef DockComponentsFactoryH
+#define DockComponentsFactoryH
+//============================================================================
+/// \file   DockComponentsFactory.h
+/// \author Uwe Kindler
+/// \date   10.02.2020
+/// \brief  Declaration of DockComponentsFactory
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "ads_globals.h"
+
+namespace ads
+{
+class CDockWidgetTab;
+class CDockAreaTitleBar;
+class CDockAreaTabBar;
+class CDockAreaWidget;
+class CDockWidget;
+
+
+
+/**
+ * Factory for creation of certain GUI elements for the docking framework.
+ * A default unique instance provided by CDockComponentsFactory is used for
+ * creation of all supported components. To inject your custom components,
+ * you can create your own derived dock components factory and register
+ * it via setDefaultFactory() function.
+ * \code
+ * CDockComponentsFactory::setDefaultFactory(new MyComponentsFactory()));
+ * \endcode
+ */
+class ADS_EXPORT CDockComponentsFactory
+{
+public:
+	/**
+	 * Force virtual destructor
+	 */
+	virtual ~CDockComponentsFactory() {}
+
+	/**
+	 * This default implementation just creates a dock widget tab with
+	 * new CDockWidgetTab(DockWIdget).
+	 */
+	virtual CDockWidgetTab* createDockWidgetTab(CDockWidget* DockWidget) const;
+
+	/**
+	 * This default implementation just creates a dock area tab bar with
+	 * new CDockAreaTabBar(DockArea).
+	 */
+	virtual CDockAreaTabBar* createDockAreaTabBar(CDockAreaWidget* DockArea) const;
+
+	/**
+	 * This default implementation just creates a dock area title bar with
+	 * new CDockAreaTitleBar(DockArea).
+	 */
+	virtual CDockAreaTitleBar* createDockAreaTitleBar(CDockAreaWidget* DockArea) const;
+
+	/**
+	 * Returns the default components factory
+	 */
+	static const CDockComponentsFactory* factory();
+
+	/**
+	 * Sets a new default factory for creation of GUI elements.
+	 * This function takes ownership of the given Factory.
+	 */
+	static void setFactory(CDockComponentsFactory* Factory);
+
+	/**
+	 * Resets the current factory to the
+	 */
+	static void resetDefaultFactory();
+};
+
+
+/**
+ * Convenience function to ease factory instance access
+ */
+inline const CDockComponentsFactory* componentsFactory()
+{
+	return CDockComponentsFactory::factory();
+}
+
+} // namespace ads
+
+//---------------------------------------------------------------------------
+#endif // DockComponentsFactoryH

src/DockContainerWidget.cpp

@@ -736,7 +736,7 @@ void DockContainerWidgetPrivate::appendDockAreas(const QList<CDockAreaWidget*> N
 //============================================================================
 void DockContainerWidgetPrivate::saveChildNodesState(QXmlStreamWriter& s, QWidget* Widget)
 {
-	QSplitter* Splitter = dynamic_cast<QSplitter*>(Widget);
+	QSplitter* Splitter = qobject_cast<QSplitter*>(Widget);
 	if (Splitter)
 	{
 		s.writeStartElement("Splitter");
@@ -759,7 +759,7 @@ void DockContainerWidgetPrivate::saveChildNodesState(QXmlStreamWriter& s, QWidge
 	}
 	else
 	{
-		CDockAreaWidget* DockArea = dynamic_cast<CDockAreaWidget*>(Widget);
+		CDockAreaWidget* DockArea = qobject_cast<CDockAreaWidget*>(Widget);
 		if (DockArea)
 		{
 			DockArea->saveState(s);
@@ -1046,7 +1046,7 @@ void DockContainerWidgetPrivate::addDockArea(CDockAreaWidget* NewDockArea, DockW
 void DockContainerWidgetPrivate::dumpRecursive(int level, QWidget* widget)
 {
 #if defined(QT_DEBUG)
-	QSplitter* Splitter = dynamic_cast<QSplitter*>(widget);
+	QSplitter* Splitter = qobject_cast<QSplitter*>(widget);
 	QByteArray buf;
     buf.fill(' ', level * 4);
 	if (Splitter)
@@ -1069,7 +1069,7 @@ void DockContainerWidgetPrivate::dumpRecursive(int level, QWidget* widget)
 	}
 	else
 	{
-		CDockAreaWidget* DockArea = dynamic_cast<CDockAreaWidget*>(widget);
+		CDockAreaWidget* DockArea = qobject_cast<CDockAreaWidget*>(widget);
 		if (!DockArea)
 		{
 			return;
@@ -1285,7 +1285,7 @@ void CDockContainerWidget::removeDockArea(CDockAreaWidget* area)
 		}
 
 		QWidget* widget = Splitter->widget(0);
-		QSplitter* ChildSplitter = dynamic_cast<QSplitter*>(widget);
+		QSplitter* ChildSplitter = qobject_cast<QSplitter*>(widget);
 		// If the one and only content widget of the splitter is not a splitter
 		// then we are finished
 		if (!ChildSplitter)
@@ -1573,7 +1573,7 @@ bool CDockContainerWidget::restoreState(CDockingStateReader& s, bool Testing)
 
 	d->Layout->replaceWidget(d->RootSplitter, NewRootSplitter);
 	QSplitter* OldRoot = d->RootSplitter;
-	d->RootSplitter = dynamic_cast<QSplitter*>(NewRootSplitter);
+	d->RootSplitter = qobject_cast<QSplitter*>(NewRootSplitter);
 	OldRoot->deleteLater();
 
 	return true;

src/DockManager.cpp

@@ -58,7 +58,7 @@
 
 namespace ads
 {
-static CDockManager::ConfigFlags StaticConfigFlags = CDockManager::DefaultOpaqueConfig;
+static CDockManager::ConfigFlags StaticConfigFlags = CDockManager::DefaultNonOpaqueConfig;
 
 /**
  * Private data class of CDockManager class (pimpl)
@@ -411,7 +411,7 @@ CDockManager::CDockManager(QWidget *parent) :
 	d(new DockManagerPrivate(this))
 {
 	createRootSplitter();
-	QMainWindow* MainWindow = dynamic_cast<QMainWindow*>(parent);
+	QMainWindow* MainWindow = qobject_cast<QMainWindow*>(parent);
 	if (MainWindow)
 	{
 		MainWindow->setCentralWidget(this);
@@ -440,6 +440,7 @@ CDockManager::~CDockManager()
 void CDockManager::registerFloatingWidget(CFloatingDockContainer* FloatingWidget)
 {
 	d->FloatingWidgets.append(FloatingWidget);
+	emit floatingWidgetCreated(FloatingWidget);
     ADS_PRINT("d->FloatingWidgets.count() " << d->FloatingWidgets.count());
 }
 

src/DockManager.h

@@ -59,6 +59,7 @@ class CDockWidgetTab;
 struct DockWidgetTabPrivate;
 struct DockAreaWidgetPrivate;
 class CIconProvider;
+class CDockComponentsFactory;
 
 /**
  * The central dock manager that maintains the complete docking system.
@@ -162,6 +163,8 @@ public:
 		DockAreaHasTabsMenuButton = 0x8000,     //!< If the flag is set each dock area has a tabs menu button
 		DockAreaHideDisabledButtons = 0x10000,    //!< If the flag is set disabled dock area buttons will not appear on the tollbar at all (enabling them will bring them back)
 		DockAreaDynamicTabsMenuButtonVisibility = 0x20000,     //!< If the flag is set dock area will disable a tabs menu button when there is only one tab in the area
+		FloatingContainerHasWidgetTitle = 0x40000,
+		FloatingContainerHasWidgetIcon = 0x80000,
 
 
         DefaultDockAreaButtons = DockAreaHasCloseButton
@@ -170,7 +173,8 @@ public:
 
 		DefaultBaseConfig = DefaultDockAreaButtons
 		                  | ActiveTabHasCloseButton
-		                  | XmlCompressionEnabled,///< default base configuration settings
+		                  | XmlCompressionEnabled
+		                  | FloatingContainerHasWidgetTitle,///< default base configuration settings
 
         DefaultOpaqueConfig = DefaultBaseConfig
 		                    | OpaqueSplitterResize
@@ -446,10 +450,17 @@ signals:
 
     /**
      * This signal is emitted if the dock manager finished opening a
-     * perspective
+     * perspective.
      */
     void perspectiveOpened(const QString& PerspectiveName);
 
+	/**
+	 * This signal is emitted, if a new floating widget has been created.
+	 * An application can use this signal to e.g. subscribe to events of
+	 * the newly created window.
+	 */
+	void floatingWidgetCreated(CFloatingDockContainer* FloatingWidget);
+
     /**
      * This signal is emitted, if a new DockArea has been created.
      * An application can use this signal to set custom icons or custom

src/DockOverlay.cpp

@@ -380,7 +380,7 @@ DockWidgetArea CDockOverlay::dropAreaUnderCursor() const
 		return Result;
 	}
 
-	CDockAreaWidget* DockArea = dynamic_cast<CDockAreaWidget*>(d->TargetWidget.data());
+	CDockAreaWidget* DockArea = qobject_cast<CDockAreaWidget*>(d->TargetWidget.data());
 	if (!DockArea)
 	{
 		return Result;
@@ -632,7 +632,7 @@ void CDockOverlayCross::updateOverlayIcons()
 	{
 		d->updateDropIndicatorIcon(Widget);
 	}
-#if QT_VESION >= 0x050600
+#if QT_VERSION >= 0x050600
 	d->LastDevicePixelRatio = devicePixelRatioF();
 #else
     d->LastDevicePixelRatio = devicePixelRatio();

src/DockWidget.cpp

@@ -54,6 +54,7 @@
 #include "DockManager.h"
 #include "FloatingDockContainer.h"
 #include "DockSplitter.h"
+#include "DockComponentsFactory.h"
 #include "ads_globals.h"
 
 
@@ -220,7 +221,7 @@ CDockWidget::CDockWidget(const QString &title, QWidget *parent) :
 	setWindowTitle(title);
 	setObjectName(title);
 
-	d->TabWidget = new CDockWidgetTab(this);
+	d->TabWidget = componentsFactory()->createDockWidgetTab(this);
     d->ToggleViewAction = new QAction(title, this);
 	d->ToggleViewAction->setCheckable(true);
 	connect(d->ToggleViewAction, SIGNAL(triggered(bool)), this,

src/DockWidgetTab.cpp

@@ -368,8 +368,13 @@ void CDockWidgetTab::mouseMoveEvent(QMouseEvent* ev)
 			return;
 		}
 
-    	// Floating is only allowed for widgets that are movable
-        if (d->DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable))
+
+    	// Floating is only allowed for widgets that are floatable
+		// If we do non opaque undocking, then can create the drag preview
+		// if the widget is movable.
+		auto Features = d->DockWidget->features();
+        if (Features.testFlag(CDockWidget::DockWidgetFloatable)
+        || (Features.testFlag(CDockWidget::DockWidgetMovable) && !CDockManager::testConfigFlag(CDockManager::OpaqueUndocking)))
         {
         	// If we undock, we need to restore the initial position of this
         	// tab because it looks strange if it remains on its dragged position

src/DockWidgetTab.h

@@ -94,11 +94,6 @@ public:
 	 */
 	void setActiveTab(bool active);
 
-	/**
-	 * Returns the dock widget this title widget belongs to
-	 */
-	CDockWidget* dockWidget() const;
-
 	/**
 	 * Sets the dock area widget the dockWidget returned by dockWidget()
 	 * function belongs to.
@@ -112,6 +107,11 @@ public:
 	 */
 	CDockAreaWidget* dockAreaWidget() const;
 
+	/**
+	 * Returns the dock widget this title widget belongs to
+	 */
+	CDockWidget* dockWidget() const;
+
 	/**
 	 * Sets the icon to show in title bar
 	 */

src/FloatingDockContainer.cpp

@@ -79,6 +79,14 @@ struct FloatingDockContainerPrivate
 	void titleMouseReleaseEvent();
 	void updateDropOverlays(const QPoint &GlobalPos);
 
+	/**
+	 * Returns true if the given config flag is set
+	 */
+	static bool testConfigFlag(CDockManager::eConfigFlag Flag)
+	{
+		return CDockManager::configFlags().testFlag(Flag);
+	}
+
 	/**
 	 * Tests is a certain state is active
 	 */
@@ -100,6 +108,31 @@ struct FloatingDockContainerPrivate
 		_this->setWindowTitle(Text);
 #endif
 	}
+
+	void reflectCurrentWidget(CDockWidget* CurrentWidget)
+	{
+		// reflect CurrentWidget's title if configured to do so, otherwise display application name as window title
+		if (testConfigFlag(CDockManager::FloatingContainerHasWidgetTitle))
+		{
+			setWindowTitle(CurrentWidget->windowTitle());
+		}
+		else
+		{
+			setWindowTitle(qApp->applicationDisplayName());
+		}
+
+		// reflect CurrentWidget's icon if configured to do so, otherwise display application icon as window icon
+		QIcon CurrentWidgetIcon = CurrentWidget->icon();
+		if (testConfigFlag(CDockManager::FloatingContainerHasWidgetIcon)
+				&& !CurrentWidgetIcon.isNull())
+		{
+			_this->setWindowIcon(CurrentWidget->icon());
+		}
+		else
+		{
+			_this->setWindowIcon(QApplication::windowIcon());
+		}
+	}
 };
 // struct FloatingDockContainerPrivate
 
@@ -537,8 +570,8 @@ void CFloatingDockContainer::onDockAreasAddedOrRemoved()
 	if (TopLevelDockArea)
 	{
 		d->SingleDockArea = TopLevelDockArea;
-		d->setWindowTitle(
-		    d->SingleDockArea->currentDockWidget()->windowTitle());
+		CDockWidget* CurrentWidget = d->SingleDockArea->currentDockWidget();
+		d->reflectCurrentWidget(CurrentWidget);
 		connect(d->SingleDockArea, SIGNAL(currentChanged(int)), this,
 		    SLOT(onDockAreaCurrentChanged(int)));
 	}
@@ -551,6 +584,7 @@ void CFloatingDockContainer::onDockAreasAddedOrRemoved()
 			d->SingleDockArea = nullptr;
 		}
 		d->setWindowTitle(qApp->applicationDisplayName());
+		setWindowIcon(QApplication::windowIcon());
 	}
 }
 
@@ -560,11 +594,13 @@ void CFloatingDockContainer::updateWindowTitle()
 	auto TopLevelDockArea = d->DockContainer->topLevelDockArea();
 	if (TopLevelDockArea)
 	{
-		d->setWindowTitle(TopLevelDockArea->currentDockWidget()->windowTitle());
+		CDockWidget* CurrentWidget = TopLevelDockArea->currentDockWidget();
+		d->reflectCurrentWidget(CurrentWidget);
 	}
 	else
 	{
 		d->setWindowTitle(qApp->applicationDisplayName());
+		setWindowIcon(QApplication::windowIcon());
 	}
 }
 
@@ -572,7 +608,8 @@ void CFloatingDockContainer::updateWindowTitle()
 void CFloatingDockContainer::onDockAreaCurrentChanged(int Index)
 {
 	Q_UNUSED(Index);
-	d->setWindowTitle(d->SingleDockArea->currentDockWidget()->windowTitle());
+	CDockWidget* CurrentWidget = d->SingleDockArea->currentDockWidget();
+	d->reflectCurrentWidget(CurrentWidget);
 }
 
 //============================================================================

src/FloatingDragPreview.cpp

@@ -206,10 +206,6 @@ CFloatingDragPreview::CFloatingDragPreview(QWidget* Content, QWidget* parent) :
 
 	connect(qApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)),
 		SLOT(onApplicationStateChanged(Qt::ApplicationState)));
-
-	// We need to install an event filter for the given Content
-	// widget to receive the escape key press
-	Content->installEventFilter(this);
 }
 
 
@@ -224,6 +220,10 @@ CFloatingDragPreview::CFloatingDragPreview(CDockWidget* Content)
 		d->ContenSourceContainer = Content->dockContainer();
 	}
 	setWindowTitle(Content->windowTitle());
+
+	// We need to install an event filter for the given Content
+	// widget to receive the escape key press
+	Content->dockAreaWidget()->installEventFilter(this);
 }
 
 
@@ -235,6 +235,10 @@ CFloatingDragPreview::CFloatingDragPreview(CDockAreaWidget* Content)
 	d->ContentSourceArea = Content;
 	d->ContenSourceContainer = Content->dockContainer();
 	setWindowTitle(Content->currentDockWidget()->windowTitle());
+
+	// We need to install an event filter for the given Content
+	// widget to receive the escape key press
+	Content->installEventFilter(this);
 }
 
 
@@ -291,25 +295,33 @@ void CFloatingDragPreview::finishDragging()
 	else
 	{
 		CDockWidget* DockWidget = qobject_cast<CDockWidget*>(d->Content);
-		CFloatingDockContainer* FloatingWidget;
-		if (DockWidget)
+		CFloatingDockContainer* FloatingWidget = nullptr;
+
+		if (DockWidget && DockWidget->features().testFlag(CDockWidget::DockWidgetFloatable))
 		{
 			FloatingWidget = new CFloatingDockContainer(DockWidget);
 		}
 		else
 		{
 			CDockAreaWidget* DockArea = qobject_cast<CDockAreaWidget*>(d->Content);
-			FloatingWidget = new CFloatingDockContainer(DockArea);
+			if (DockArea->features().testFlag(CDockWidget::DockWidgetFloatable))
+			{
+				FloatingWidget = new CFloatingDockContainer(DockArea);
+			}
 		}
-		FloatingWidget->setGeometry(this->geometry());
-		FloatingWidget->show();
-		if (!CDockManager::configFlags().testFlag(CDockManager::DragPreviewHasWindowFrame))
+
+		if (FloatingWidget)
 		{
-			QApplication::processEvents();
-			int FrameHeight = FloatingWidget->frameGeometry().height() - FloatingWidget->geometry().height();
-			QRect FixedGeometry = this->geometry();
-			FixedGeometry.adjust(0, FrameHeight, 0, 0);
-			FloatingWidget->setGeometry(FixedGeometry);
+			FloatingWidget->setGeometry(this->geometry());
+			FloatingWidget->show();
+			if (!CDockManager::configFlags().testFlag(CDockManager::DragPreviewHasWindowFrame))
+			{
+				QApplication::processEvents();
+				int FrameHeight = FloatingWidget->frameGeometry().height() - FloatingWidget->geometry().height();
+				QRect FixedGeometry = this->geometry();
+				FixedGeometry.adjust(0, FrameHeight, 0, 0);
+				FloatingWidget->setGeometry(FixedGeometry);
+			}
 		}
 	}
 
@@ -373,7 +385,7 @@ bool CFloatingDragPreview::eventFilter(QObject *watched, QEvent *event)
         QKeyEvent* e = static_cast<QKeyEvent*>(event);
         if (e->key() == Qt::Key_Escape)
         {
-            d->Content->removeEventFilter(this);
+            watched->removeEventFilter(this);
             d->cancelDragging();
         }
     }

src/src.pro

@@ -43,7 +43,8 @@ HEADERS += \
     DockSplitter.h \
     DockAreaTitleBar.h \
     ElidingLabel.h \
-    IconProvider.h
+    IconProvider.h \
+    DockComponentsFactory.h 
 
 
 SOURCES += \
@@ -61,7 +62,8 @@ SOURCES += \
     DockSplitter.cpp \
     DockAreaTitleBar.cpp \
     ElidingLabel.cpp \
-    IconProvider.cpp
+    IconProvider.cpp \
+    DockComponentsFactory.cpp
 
 
 unix {