Added option ShowAutoHideOnMouseOver that enables showing of auto hide widgets by hovering over auto hide tab

src/AutoHideDockContainer.cpp

@@ -147,7 +147,7 @@ struct AutoHideDockContainerPrivate
 	 */
 	void updateResizeHandleSizeLimitMax()
 	{
-		auto Rect = _this->parentContainer()->contentRect();
+		auto Rect = _this->dockContainer()->contentRect();
 		const auto maxResizeHandleSize = ResizeHandle->orientation() == Qt::Horizontal
 			? Rect.width() : Rect.height();
 		ResizeHandle->setMaxResizeSize(maxResizeHandleSize - ResizeMargin);
@@ -161,6 +161,18 @@ struct AutoHideDockContainerPrivate
 		return isHorizontalArea(SideTabBarArea);
 	}
 
+	/**
+	 * Forward this event to the dock container
+	 */
+	void forwardEventToDockContainer(QEvent* event)
+	{
+		auto DockContainer = _this->dockContainer();
+		if (DockContainer)
+		{
+			DockContainer->handleAutoHideWidgetEvent(event, _this);
+		}
+	}
+
 }; // struct AutoHideDockContainerPrivate
 
 
@@ -174,7 +186,7 @@ AutoHideDockContainerPrivate::AutoHideDockContainerPrivate(
 
 
 //============================================================================
-CDockContainerWidget* CAutoHideDockContainer::parentContainer() const
+CDockContainerWidget* CAutoHideDockContainer::dockContainer() const
 {
 	if (d->DockArea)
 	{
@@ -231,7 +243,7 @@ CAutoHideDockContainer::CAutoHideDockContainer(CDockWidget* DockWidget, SideBarL
 //============================================================================
 void CAutoHideDockContainer::updateSize()
 {
-	auto dockContainerParent = parentContainer();
+	auto dockContainerParent = dockContainer();
 	if (!dockContainerParent)
 	{
 		return;
@@ -281,9 +293,9 @@ CAutoHideDockContainer::~CAutoHideDockContainer()
 
 	// Remove event filter in case there are any queued messages
 	qApp->removeEventFilter(this);
-	if (parentContainer())
+	if (dockContainer())
 	{
-		parentContainer()->removeAutoHideWidget(this);
+		dockContainer()->removeAutoHideWidget(this);
 	}
 
 	if (d->SideTab)
@@ -297,7 +309,7 @@ CAutoHideDockContainer::~CAutoHideDockContainer()
 //============================================================================
 CAutoHideSideBar* CAutoHideDockContainer::sideBar() const
 {
-	return parentContainer()->sideTabBar(d->SideTabBarArea);
+	return dockContainer()->sideTabBar(d->SideTabBarArea);
 }
 
 
@@ -366,7 +378,7 @@ void CAutoHideDockContainer::moveContentsToParent()
 	// location like it had as a auto hide widget.  This brings the least surprise
 	// to the user and he does not have to search where the widget was inserted.
 	d->DockWidget->setDockArea(nullptr);
-	parentContainer()->addDockWidget(d->getDockWidgetArea(d->SideTabBarArea), d->DockWidget);
+	dockContainer()->addDockWidget(d->getDockWidgetArea(d->SideTabBarArea), d->DockWidget);
 }
 
 
@@ -479,7 +491,7 @@ bool CAutoHideDockContainer::eventFilter(QObject* watched, QEvent* event)
 	}
 	else if (event->type() == QEvent::MouseButtonPress)
 	{
-		auto Container = parentContainer();
+		auto Container = dockContainer();
 		// First we check, if the mouse button press is inside the container
 		// widget. If it is not, i.e. if someone resizes the main window or
 		// clicks into the application menu or toolbar, then we ignore the
@@ -543,5 +555,29 @@ void CAutoHideDockContainer::resizeEvent(QResizeEvent* event)
 	}
 }
 
+
+//============================================================================
+void CAutoHideDockContainer::leaveEvent(QEvent *event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::leaveEvent(event);
+}
+
+
+//============================================================================
+void CAutoHideDockContainer::enterEvent(QEvent *event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::enterEvent(event);
+}
+
+
+//============================================================================
+void CAutoHideDockContainer::hideEvent(QHideEvent *event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::hideEvent(event);
+}
+
 }
 

src/AutoHideDockContainer.h

@@ -61,8 +61,12 @@ private:
 	friend SideTabBarPrivate;
 
 protected:
-	bool eventFilter(QObject* watched, QEvent* event) override;
+	virtual bool eventFilter(QObject* watched, QEvent* event) override;
-	void resizeEvent(QResizeEvent* event) override;
+	virtual void resizeEvent(QResizeEvent* event) override;
+	virtual void leaveEvent(QEvent *event) override;
+	virtual void enterEvent(QEvent *event) override;
+	virtual void hideEvent(QHideEvent *event) override;
+
 
 	/**
 	 * Updates the size considering the size limits and the resize margins
@@ -126,7 +130,7 @@ public:
 	/**
 	 * Returns the parent container that hosts this auto hide container
 	 */
-	CDockContainerWidget* parentContainer() const;
+	CDockContainerWidget* dockContainer() const;
 
 	/**
 	 * Moves the contents to the parent container widget

src/AutoHideTab.cpp

@@ -30,6 +30,7 @@
 #include "AutoHideTab.h"
 
 #include <QBoxLayout>
+#include <QApplication>
 
 #include "AutoHideDockContainer.h"
 #include "AutoHideSideBar.h"
@@ -59,6 +60,26 @@ struct AutoHideTabPrivate
 	 * the side bar
 	 */
 	void updateOrientation();
+
+	/**
+	 * Convenience function to ease dock container access
+	 */
+	CDockContainerWidget* dockContainer() const
+	{
+		return DockWidget ? DockWidget->dockContainer() : nullptr;
+	}
+
+	/**
+	 * Forward this event to the dock container
+	 */
+	void forwardEventToDockContainer(QEvent* event)
+	{
+		auto DockContainer = dockContainer();
+		if (DockContainer)
+		{
+			DockContainer->handleAutoHideWidgetEvent(event, _this);
+		}
+	}
 }; // struct DockWidgetTabPrivate
 
 
@@ -228,4 +249,28 @@ void CAutoHideTab::setDockWidget(CDockWidget* DockWidget)
 	setIcon(d->DockWidget->icon());
 }
 
+
+//============================================================================
+void CAutoHideTab::enterEvent(QEvent *event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::enterEvent(event);
+}
+
+
+//============================================================================
+void CAutoHideTab::leaveEvent(QEvent *event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::leaveEvent(event);
+}
+
+
+//============================================================================
+void CAutoHideTab::mousePressEvent(QMouseEvent* event)
+{
+	d->forwardEventToDockContainer(event);
+	Super::mousePressEvent(event);
+}
+
 }

src/AutoHideTab.h

@@ -67,6 +67,9 @@ protected:
 
 	void setSideBar(CAutoHideSideBar *SideTabBar);
 	void removeFromSideBar();
+	virtual void enterEvent(QEvent *event) override;
+	virtual void leaveEvent(QEvent *event) override;
+	virtual void mousePressEvent(QMouseEvent* event) override;
 
 public:
     using Super = CPushButton;

src/DockContainerWidget.cpp

@@ -28,9 +28,6 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include <AutoHideDockContainer.h>
-#include <AutoHideSideBar.h>
-#include <AutoHideTab.h>
 #include "DockContainerWidget.h"
 
 #include <QEvent>
@@ -42,6 +39,10 @@
 #include <QXmlStreamWriter>
 #include <QAbstractButton>
 #include <QLabel>
+#include <QTimer>
+#include <QMetaObject>
+#include <QMetaType>
+#include <QApplication>
 
 #include "DockManager.h"
 #include "DockAreaWidget.h"
@@ -54,6 +55,9 @@
 #include "DockWidgetTab.h"
 #include "DockAreaTitleBar.h"
 #include "DockFocusController.h"
+#include "AutoHideDockContainer.h"
+#include "AutoHideSideBar.h"
+#include "AutoHideTab.h"
 
 #include <functional>
 #include <iostream>
@@ -146,6 +150,9 @@ public:
 	CDockAreaWidget* LastAddedAreaCache[5];
 	int VisibleDockAreaCount = -1;
 	CDockAreaWidget* TopLevelDockArea = nullptr;
+	QTimer DelayedAutoHideTimer;
+	CAutoHideTab* DelayedAutoHideTab;
+	bool DelayedAutoHideShow = false;
 
 	/**
 	 * Private data constructor
@@ -371,6 +378,14 @@ DockContainerWidgetPrivate::DockContainerWidgetPrivate(CDockContainerWidget* _pu
 	_this(_public)
 {
 	std::fill(std::begin(LastAddedAreaCache),std::end(LastAddedAreaCache), nullptr);
+	DelayedAutoHideTimer.setSingleShot(true);
+	DelayedAutoHideTimer.setInterval(500);
+	QObject::connect(&DelayedAutoHideTimer, &QTimer::timeout, [this](){
+		qDebug() << "DelayedAutoHideTimer timeout";
+		auto GlobalPos = DelayedAutoHideTab->mapToGlobal(QPoint(0, 0));
+		qApp->sendEvent(DelayedAutoHideTab, new QMouseEvent(QEvent::MouseButtonPress,
+				QPoint(0, 0), GlobalPos, Qt::LeftButton, {Qt::LeftButton}, Qt::NoModifier));
+	});
 }
 
 
@@ -2045,6 +2060,78 @@ CDockManager* CDockContainerWidget::dockManager() const
 {
 	return d->DockManager;
 }
+
+
+//===========================================================================
+void CDockContainerWidget::handleAutoHideWidgetEvent(QEvent* e, QWidget* w)
+{
+	if (!CDockManager::testAutoHideConfigFlag(CDockManager::ShowAutoHideOnMouseOver))
+	{
+		return;
+	}
+
+	if (dockManager()->isRestoringState())
+	{
+		return;
+	}
+
+	auto AutoHideTab = qobject_cast<CAutoHideTab*>(w);
+	if (AutoHideTab)
+	{
+		qDebug() << "Event AutoHideTab " << e;
+		switch (e->type())
+		{
+		case QEvent::Enter:
+			 if (!AutoHideTab->dockWidget()->isVisible())
+			 {
+				 d->DelayedAutoHideTab = AutoHideTab;
+				 d->DelayedAutoHideShow = true;
+				 d->DelayedAutoHideTimer.start();
+			 }
+			 else
+			 {
+				 d->DelayedAutoHideTimer.stop();
+			 }
+			 break;
+
+		case QEvent::Leave:
+		case QEvent::MouseButtonPress:
+			 d->DelayedAutoHideTimer.stop();
+			 break;
+
+		default:
+			break;
+		}
+		return;
+	}
+
+	auto AutoHideContainer = qobject_cast<CAutoHideDockContainer*>(w);
+	if (AutoHideContainer)
+	{
+		qDebug() << "Event AutoHideContainer " << e;
+		switch (e->type())
+		{
+		case QEvent::Enter:
+		case QEvent::Hide:
+			 d->DelayedAutoHideTimer.stop();
+			 break;
+
+		case QEvent::Leave:
+			 if (AutoHideContainer->isVisible())
+			 {
+				 d->DelayedAutoHideTab = AutoHideContainer->autoHideTab();
+				 d->DelayedAutoHideShow = false;
+				 d->DelayedAutoHideTimer.start();
+			 }
+			 break;
+
+		default:
+			break;
+		}
+		return;
+		return;
+	}
+}
 } // namespace ads
 
 //---------------------------------------------------------------------------

src/DockContainerWidget.h

@@ -52,6 +52,9 @@ class CFloatingDragPreview;
 struct FloatingDragPreviewPrivate;
 class CDockingStateReader;
 class CAutoHideSideBar;
+class CAutoHideTab;
+struct AutoHideTabPrivate;
+struct AutoHideDockContainerPrivate;
 
 
 /**
@@ -76,7 +79,10 @@ private:
 	friend class CDockWidget;
 	friend class CFloatingDragPreview;
 	friend struct FloatingDragPreviewPrivate;
-	friend class CAutoHideDockContainer;
+	friend CAutoHideDockContainer;
+	friend CAutoHideTab;
+	friend AutoHideTabPrivate;
+	friend AutoHideDockContainerPrivate;
 
 protected:
 	/**
@@ -190,6 +196,11 @@ protected:
 	 */
     void removeAutoHideWidget(CAutoHideDockContainer* AutoHideWidget);
 
+    /**
+     * Handles widget events of auto hide widgets to trigger delayed show
+     * or hide actions for auto hide container on auto hide tab mouse over
+     */
+    void handleAutoHideWidgetEvent(QEvent* e, QWidget* w);
 
 public:
 	/**

src/DockManager.h

@@ -243,6 +243,7 @@ public:
 		BottomSideBarIconOnly = 0x40,//!< If the flag is set bottom side show only icon if a the dock widget has an icon assigned
 		TopSideBarIconOnly = 0x80, //!< If the flag is set top side bar show only icon if a the dock widget has an icon assigned
 		AutoHideSideBarsIconOnly = LeftSideBarIconOnly | RightSideBarIconOnly | BottomSideBarIconOnly | TopSideBarIconOnly,
+		ShowAutoHideOnMouseOver = 0x100, ///< show the auto hide window on mouse over tab and hide it if mouse leaves auto hide container
 
 		DefaultAutoHideConfig = AutoHideFeatureEnabled
 			                  | DockAreaHasAutoHideButton ///< the default configuration for left and right side bars