Add title label to the overlayed dock area

src/DockAreaTitleBar.cpp

@@ -49,10 +49,10 @@
 #include "DockWidget.h"
 #include "DockWidgetTab.h"
 #include "DockAreaTabBar.h"
-#include "IconProvider.h"
 #include "DockComponentsFactory.h"
 #include "DockFocusController.h"
 #include "OverlayDockContainer.h"
+#include "ElidingLabel.h"
 
 #include <iostream>
 
@@ -72,6 +72,7 @@ struct DockAreaTitleBarPrivate
 	QBoxLayout* Layout;
 	CDockAreaWidget* DockArea;
 	CDockAreaTabBar* TabBar;
+	CElidingLabel* OverlayTitleLabel;
 	bool MenuOutdated = true;
 	QMenu* TabsMenu;
 	QList<tTitleBarButton*> DockWidgetActionsButtons;
@@ -91,6 +92,12 @@ struct DockAreaTitleBarPrivate
 	 */
 	void createButtons();
 
+
+	/**
+	 * Creates the overlay title label, only displayed when the dock area is overlayed
+	 */
+    void createOverlayTitleLabel();
+
     /**
 	 * Creates the internal TabBar
 	 */
@@ -207,6 +214,15 @@ void DockAreaTitleBarPrivate::createButtons()
 }
 
 
+//============================================================================
+void DockAreaTitleBarPrivate::createOverlayTitleLabel()
+{
+	OverlayTitleLabel = new CElidingLabel("");
+	OverlayTitleLabel->setObjectName("overlayTitleLabel");
+	Layout->addWidget(OverlayTitleLabel);
+}
+
+
 //============================================================================
 void DockAreaTitleBarPrivate::createTabBar()
 {
@@ -287,6 +303,8 @@ CDockAreaTitleBar::CDockAreaTitleBar(CDockAreaWidget* parent) :
 	setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 
 	d->createTabBar();
+	d->createOverlayTitleLabel();
+	d->OverlayTitleLabel->setVisible(false); // Default hidden
 	d->Layout->addWidget(new CSpacerWidget(this));
 	d->createButtons();
 
@@ -480,6 +498,13 @@ QAbstractButton* CDockAreaTitleBar::button(TitleBarButton which) const
 }
 
 
+//============================================================================
+CElidingLabel* CDockAreaTitleBar::overlayTitleLabel() const
+{
+	return d->OverlayTitleLabel;
+}
+
+
 //============================================================================
 void CDockAreaTitleBar::setVisible(bool Visible)
 {

src/DockAreaTitleBar.h

@@ -41,6 +41,7 @@ namespace ads
 class CDockAreaTabBar;
 class CDockAreaWidget;
 struct DockAreaTitleBarPrivate;
+class CElidingLabel;
 
 /**
  * Title bar of a dock area.
@@ -120,6 +121,11 @@ public:
 	 */
 	QAbstractButton* button(TitleBarButton which) const;
 
+	/**
+	 * Returns the overlay title label, used when the dock area is overlayed
+	 */
+	CElidingLabel* overlayTitleLabel() const;
+
 	/**
 	 * Updates the visibility of the dock widget actions in the title bar
 	 */

src/DockAreaWidget.cpp

@@ -32,18 +32,15 @@
 
 #include <QStackedLayout>
 #include <QScrollBar>
-#include <QScrollArea>
 #include <QWheelEvent>
 #include <QStyle>
 #include <QPushButton>
 #include <QDebug>
 #include <QMenu>
-#include <QSplitter>
 #include <QXmlStreamWriter>
-#include <QVector>
 #include <QList>
 
-
+#include "ElidingLabel.h"
 #include "DockContainerWidget.h"
 #include "DockWidget.h"
 #include "FloatingDockContainer.h"
@@ -54,7 +51,6 @@
 #include "DockAreaTitleBar.h"
 #include "DockComponentsFactory.h"
 #include "DockWidgetTab.h"
-#include "SideTabBar.h"
 #include "DockWidgetSideTab.h"
 #include "OverlayDockContainer.h"
 
@@ -451,6 +447,7 @@ void CDockAreaWidget::insertDockWidget(int index, CDockWidget* DockWidget,
 	d->tabBar()->insertTab(index, TabWidget);
 	d->tabBar()->blockSignals(false);
 	TabWidget->setVisible(!DockWidget->isClosed());
+	d->TitleBar->overlayTitleLabel()->setText(DockWidget->windowTitle());
 	DockWidget->setProperty(INDEX_PROPERTY, index);
 	d->MinSizeHint.setHeight(qMax(d->MinSizeHint.height(), DockWidget->minimumSizeHint().height()));
 	d->MinSizeHint.setWidth(qMax(d->MinSizeHint.width(), DockWidget->minimumSizeHint().width()));
@@ -787,7 +784,9 @@ void CDockAreaWidget::updateTitleBarVisibility()
 			|| CDockManager::testConfigFlag(CDockManager::HideSingleCentralWidgetTitleBar));
 		Hidden |= (d->Flags.testFlag(HideSingleWidgetTitleBar) && openDockWidgetsCount() == 1);
 		d->TitleBar->setVisible(isOverlayed() ? true : !Hidden); // Titlebar must always be visible when overlayed so it can be dragged
-        d->TitleBar->tabBar()->setVisible(isOverlayed() ? false : !Hidden);  // Never show tab bar when overlayed
+		auto tabBar = d->TitleBar->tabBar();
+        tabBar->setVisible(isOverlayed() ? false : !Hidden);  // Never show tab bar when overlayed
+        d->TitleBar->overlayTitleLabel()->setVisible(isOverlayed());  // Always show when overlayed, never otherwise
 	}
 }