Add initial functionality for Auto hide

- Add left and right side tab widgets
- Add overlay dock and overlay dock widget behavior

src/SideTabBar.cpp

@@ -0,0 +1,101 @@
+/*******************************************************************************
+** 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   DockWidgetTab.h
+/// \author Syarif Fakhri
+/// \date   05.09.2022
+/// \brief  Implementation of CSideTabBar class
+//============================================================================
+
+
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "SideTabBar.h"
+#include "DockContainerWidget.h"
+#include "DockWidgetSideTab.h"
+#include "DockWidgetTab.h"
+
+#include <QBoxLayout>
+
+namespace ads
+{
+/**
+ * Private data class of CSideTabBar class (pimpl)
+ */
+struct SideTabBarPrivate
+{
+	/**
+	 * Private data constructor
+	 */
+	SideTabBarPrivate(CSideTabBar* _public);
+
+    CSideTabBar* _this;
+    CDockContainerWidget* ContainerWidget;
+    QBoxLayout* TabsLayout;
+}; // struct SideTabBarPrivate
+
+//============================================================================
+SideTabBarPrivate::SideTabBarPrivate(CSideTabBar* _public) :
+    _this(_public)
+{
+}
+
+
+//============================================================================
+CSideTabBar::CSideTabBar(CDockContainerWidget* parent) :
+    QWidget(parent),
+    d(new SideTabBarPrivate(this))
+{
+    d->ContainerWidget = parent;
+
+    d->TabsLayout = new QBoxLayout(QBoxLayout::TopToBottom);
+    d->TabsLayout->setContentsMargins(0, 0, 0, 0);
+    d->TabsLayout->setSpacing(0);
+    d->TabsLayout->addStretch(1);
+    setLayout(d->TabsLayout);
+
+    setFocusPolicy(Qt::NoFocus);
+}
+
+
+//============================================================================
+CSideTabBar::~CSideTabBar() 
+{
+	delete d;
+}
+
+
+//============================================================================
+void CSideTabBar::insertSideTab(int Index, CDockWidgetSideTab* SideTab)
+{
+    d->TabsLayout->insertWidget(Index, SideTab);
+    SideTab->setSideTabBar(this);
+}
+
+
+//============================================================================
+void CSideTabBar::removeSideTab(CDockWidgetSideTab* SideTab)
+{
+    const auto index = d->TabsLayout->indexOf(SideTab);
+    d->TabsLayout->removeWidget(SideTab);
+}
+}