Fix issue #351: #351 (#357)

Author: LucasAudebert

src/DockContainerWidget.cpp

@@ -1565,8 +1565,9 @@ void CDockContainerWidget::dropFloatingWidget(CFloatingDockContainer* FloatingWi
 	}
 
 	if (Dropped)
-	{
-		FloatingWidget->deleteLater();
+	{ 
+		// Fix https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System/issues/351
+		FloatingWidget->hideAndDeleteLater();
 
 		// If we dropped a floating widget with only one single dock widget, then we
 		// drop a top level widget that changes from floating to docked now

src/FloatingDockContainer.cpp

@@ -373,6 +373,7 @@ struct FloatingDockContainerPrivate
 	CDockAreaWidget *SingleDockArea = nullptr;
 	QPoint DragStartPos;
 	bool Hiding = false;
+	bool AutoHideChildren = true;
 #ifdef Q_OS_LINUX
     QWidget* MouseEventHandler = nullptr;
     CFloatingWidgetTitleBar* TitleBar = nullptr;
@@ -841,15 +842,18 @@ void CFloatingDockContainer::hideEvent(QHideEvent *event)
         return;
     }
 
-    d->Hiding = true;
-	for (auto DockArea : d->DockContainer->openedDockAreas())
+	if ( d->AutoHideChildren )
 	{
-		for (auto DockWidget : DockArea->openedDockWidgets())
+		d->Hiding = true;
+		for ( auto DockArea : d->DockContainer->openedDockAreas() )
 		{
-			DockWidget->toggleView(false);
+			for ( auto DockWidget : DockArea->openedDockWidgets() )
+			{
+				DockWidget->toggleView( false );
+			}
 		}
+		d->Hiding = false;
 	}
-	d->Hiding = false;
 }
 
 
@@ -1035,6 +1039,18 @@ QList<CDockWidget*> CFloatingDockContainer::dockWidgets() const
 	return d->DockContainer->dockWidgets();
 }
 
+//============================================================================
+void CFloatingDockContainer::hideAndDeleteLater()
+{
+	// Widget has been redocked, so it must be hidden right way (see 
+	// https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System/issues/351)
+	// but AutoHideChildren must be set to false because "this" still contains
+	// dock widgets that shall not be toggled hidden.
+	d->AutoHideChildren = false;
+	hide();
+	deleteLater();
+}
+
 //============================================================================
 void CFloatingDockContainer::finishDragging()
 {

src/FloatingDockContainer.h

@@ -258,6 +258,11 @@ private Q_SLOTS:
      */
     QList<CDockWidget*> dockWidgets() const;
 
+	/**
+	 * This function hides the floating bar instantely and delete it later.
+	 */
+	void hideAndDeleteLater();
+
 #ifdef Q_OS_LINUX
     /**
 	 * This is a function that responds to FloatingWidgetTitleBar::maximizeRequest()