Add initial functionality for Auto hide

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

src/DockWidgetSideTab.cpp

@@ -0,0 +1,151 @@
+/*******************************************************************************
+** 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 CDockWidgetSideTab class
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include "DockWidgetSideTab.h"
+#include "SideTabBar.h"
+
+#include <QBoxLayout>
+
+#include "ElidingLabel.h"
+
+#include "DockWidget.h"
+
+namespace ads
+{
+
+using tTabLabel = CVerticalElidingLabel;
+
+/**
+ * Private data class of CDockWidgetTab class (pimpl)
+ */
+struct DockWidgetSideTabPrivate
+{
+    CDockWidgetSideTab* _this;
+    CDockWidget* DockWidget;
+    tTabLabel* TitleLabel;
+	QBoxLayout* Layout;
+	CSideTabBar* SideTabBar;
+
+	/**
+	 * Private data constructor
+	 */
+	DockWidgetSideTabPrivate(CDockWidgetSideTab* _public);
+
+	/**
+	 * Creates the complete layout
+	 */
+	void createLayout();
+};
+// struct DockWidgetTabPrivate
+
+
+//============================================================================
+DockWidgetSideTabPrivate::DockWidgetSideTabPrivate(CDockWidgetSideTab* _public) :
+	_this(_public)
+{
+
+}
+
+//============================================================================
+void DockWidgetSideTabPrivate::createLayout()
+{
+	TitleLabel = new tTabLabel();
+	TitleLabel->setElideMode(Qt::ElideRight);
+	TitleLabel->setText(DockWidget->windowTitle());
+	TitleLabel->setObjectName("dockWidgetTabLabel");
+	TitleLabel->setAlignment(Qt::AlignCenter);
+	_this->connect(TitleLabel, SIGNAL(elidedChanged(bool)), SIGNAL(elidedChanged(bool)));
+
+	QFontMetrics fm(TitleLabel->font());
+	int Spacing = qRound(fm.height() / 2.0);
+
+	// Fill the layout
+	Layout = new QBoxLayout(QBoxLayout::LeftToRight);
+	Layout->setContentsMargins(Spacing,Spacing,0,Spacing);
+	Layout->setSpacing(0);
+	_this->setLayout(Layout);
+	Layout->addWidget(TitleLabel, 1);
+	Layout->setAlignment(Qt::AlignCenter);
+
+	TitleLabel->setVisible(true);
+}
+
+//============================================================================
+void CDockWidgetSideTab::mousePressEvent(QMouseEvent* event)
+{
+	if (event->button() == Qt::LeftButton)
+	{
+        emit clicked();
+	}
+
+    QFrame::mousePressEvent(event);
+}
+
+
+//============================================================================
+void CDockWidgetSideTab::setSideTabBar(CSideTabBar* SideTabBar)
+{
+	d->SideTabBar = SideTabBar;
+}
+
+
+//============================================================================
+void CDockWidgetSideTab::removeFromSideTabBar()
+{
+	if (d->SideTabBar == nullptr)
+	{
+		return;
+	}
+	d->SideTabBar->removeSideTab(this);
+    setSideTabBar(nullptr);
+}
+
+//============================================================================
+CDockWidgetSideTab::CDockWidgetSideTab(CDockWidget* DockWidget, QWidget* parent) : 
+	QFrame(parent),
+	d(new DockWidgetSideTabPrivate(this))
+{
+	setAttribute(Qt::WA_NoMousePropagation);
+	d->DockWidget = DockWidget;
+	d->createLayout();
+	setFocusPolicy(Qt::NoFocus);
+}
+
+//============================================================================
+CDockWidgetSideTab::~CDockWidgetSideTab()
+{
+	delete d;
+}
+
+//============================================================================
+void CDockWidgetSideTab::updateStyle()
+{
+	internal::repolishStyle(this, internal::RepolishDirectChildren);
+}
+}