Added parentSplitter() fucntion to DockArea and removed dead code from DockContainerWidget

src/DockAreaWidget.cpp

@@ -464,6 +464,13 @@ CAutoHideDockContainer* CDockAreaWidget::autoHideDockContainer() const
 	return d->AutoHideDockContainer;
 }
 
+
+//============================================================================
+CDockSplitter* CDockAreaWidget::parentSplitter() const
+{
+	return internal::findParent<CDockSplitter*>(this);
+}
+
 //============================================================================
 bool CDockAreaWidget::isAutoHide() const
 {
@@ -600,7 +607,7 @@ void CDockAreaWidget::hideAreaWithNoVisibleContent()
 	this->toggleView(false);
 
 	// Hide empty parent splitters
-	auto Splitter = internal::findParent<CDockSplitter*>(this);
+	auto Splitter = parentSplitter();
 	internal::hideEmptyParentSplitters(Splitter);
 
 	//Hide empty floating widget

src/DockAreaWidget.h

@@ -47,6 +47,7 @@ class CDockContainerWidget;
 class DockContainerWidgetPrivate;
 class CDockAreaTitleBar;
 class CDockingStateReader;
+class CDockSplitter;
 
 
 /**
@@ -216,6 +217,11 @@ public:
 	 */
 	CAutoHideDockContainer* autoHideDockContainer() const; 
 
+	/**
+	 * Returns the parent splitter that contains this dock area
+	 */
+	CDockSplitter* parentSplitter() const;
+
 	/**
 	 * Returns true if the dock area is in an auto hide container
 	 */

src/DockContainerWidget.cpp

@@ -587,16 +587,7 @@ void DockContainerWidgetPrivate::dropIntoSection(CFloatingDockContainer* Floatin
 	auto InsertParam = internal::dockAreaInsertParameters(area);
 	auto NewDockAreas = FloatingContainer->findChildren<CDockAreaWidget*>(
 		QString(), Qt::FindChildrenRecursively);
-	QSplitter* TargetAreaSplitter = internal::findParent<QSplitter*>(TargetArea);
+	auto TargetAreaSplitter = TargetArea->parentSplitter();
-
-	if (!TargetAreaSplitter)
-	{
-		QSplitter* Splitter = newSplitter(InsertParam.orientation());
-		Layout->replaceWidget(TargetArea, Splitter);
-		Splitter->addWidget(TargetArea);
-        updateSplitterHandles(Splitter);
-        TargetAreaSplitter = Splitter;
-	}
 	int AreaIndex = TargetAreaSplitter->indexOf(TargetArea);
 	auto FloatingSplitter = FloatingContainer->rootSplitter();
 	if (TargetAreaSplitter->orientation() == InsertParam.orientation())
@@ -742,7 +733,7 @@ void DockContainerWidgetPrivate::moveToNewSection(QWidget* Widget, CDockAreaWidg
 	}
 
 	auto InsertParam = internal::dockAreaInsertParameters(area);
-	QSplitter* TargetAreaSplitter = internal::findParent<QSplitter*>(TargetArea);
+	auto TargetAreaSplitter = TargetArea->parentSplitter();
 	int AreaIndex = TargetAreaSplitter->indexOf(TargetArea);
 	auto Sizes = TargetAreaSplitter->sizes();
 	if (TargetAreaSplitter->orientation() == InsertParam.orientation())
@@ -877,7 +868,7 @@ void DockContainerWidgetPrivate::moveToContainer(QWidget* Widget, DockWidgetArea
 		// it already has and do nothing, if it is the same place. It would
 		// also work without this check, but it looks nicer with the check
 		// because there will be no layout updates
-		auto Splitter = internal::findParent<CDockSplitter*>(DroppedDockArea);
+		auto Splitter = DroppedDockArea->parentSplitter();
 		auto InsertParam = internal::dockAreaInsertParameters(area);
 		if (Splitter == RootSplitter && InsertParam.orientation() == Splitter->orientation())
 		{
@@ -1364,7 +1355,7 @@ CDockAreaWidget* DockContainerWidgetPrivate::addDockWidgetToDockArea(DockWidgetA
 	NewDockArea->addDockWidget(Dockwidget);
 	auto InsertParam = internal::dockAreaInsertParameters(area);
 
-	QSplitter* TargetAreaSplitter = internal::findParent<QSplitter*>(TargetDockArea);
+	auto TargetAreaSplitter = TargetDockArea->parentSplitter();
 	int index = TargetAreaSplitter ->indexOf(TargetDockArea);
 	if (TargetAreaSplitter->orientation() == InsertParam.orientation())
 	{
@@ -1381,7 +1372,7 @@ CDockAreaWidget* DockContainerWidgetPrivate::addDockWidgetToDockArea(DockWidgetA
 	{
 		ADS_PRINT("TargetAreaSplitter->orientation() != InsertParam.orientation()");
 		auto TargetAreaSizes = TargetAreaSplitter->sizes();
-		QSplitter* NewSplitter = newSplitter(InsertParam.orientation());
+		auto NewSplitter = newSplitter(InsertParam.orientation());
 		NewSplitter->addWidget(TargetDockArea);
 
 		insertWidgetIntoSplitter(NewSplitter, NewDockArea, InsertParam.append());
@@ -1572,7 +1563,7 @@ void CDockContainerWidget::removeDockArea(CDockAreaWidget* area)
 
 	area->disconnect(this);
 	d->DockAreas.removeAll(area);
-	CDockSplitter* Splitter = internal::findParent<CDockSplitter*>(area);
+	auto Splitter = area->parentSplitter();
 
 	// Remove are from parent splitter and recursively hide tree of parent
 	// splitters if it has no visible content
@@ -1943,7 +1934,7 @@ bool CDockContainerWidget::restoreState(CDockingStateReader& s, bool Testing)
 
 
 //============================================================================
-QSplitter* CDockContainerWidget::rootSplitter() const
+CDockSplitter* CDockContainerWidget::rootSplitter() const
 {
 	return d->RootSplitter;
 }

src/DockContainerWidget.h

@@ -53,6 +53,7 @@ struct FloatingDragPreviewPrivate;
 class CDockingStateReader;
 class CAutoHideSideBar;
 class CAutoHideTab;
+class CDockSplitter;
 struct AutoHideTabPrivate;
 struct AutoHideDockContainerPrivate;
 
@@ -94,7 +95,7 @@ protected:
 	/**
 	 * Access function for the internal root splitter
 	 */
-	QSplitter* rootSplitter() const;
+	CDockSplitter* rootSplitter() const;
 
 	/**
 	 * Creates and initializes a dockwidget auto hide container into the given area.

src/DockManager.cpp

@@ -1318,7 +1318,7 @@ QList<int> CDockManager::splitterSizes(CDockAreaWidget *ContainedArea) const
 {
     if (ContainedArea)
     {
-        auto Splitter = internal::findParent<CDockSplitter*>(ContainedArea);
+        auto Splitter = ContainedArea->parentSplitter();
         if (Splitter)
         {
             return Splitter->sizes();
@@ -1335,7 +1335,7 @@ void CDockManager::setSplitterSizes(CDockAreaWidget *ContainedArea, const QList<
         return;
     }
 
-    auto Splitter = internal::findParent<CDockSplitter*>(ContainedArea);
+    auto Splitter = ContainedArea->parentSplitter();
     if (Splitter && Splitter->count() == sizes.count())
     {
         Splitter->setSizes(sizes);

src/DockWidget.cpp

@@ -184,11 +184,11 @@ void DockWidgetPrivate::showDockWidget()
 		DockArea->setCurrentDockWidget(_this);
 		DockArea->toggleView(true);
 		TabWidget->show();
-		QSplitter* Splitter = internal::findParent<QSplitter*>(DockArea);
+		auto Splitter = DockArea->parentSplitter();
 		while (Splitter && !Splitter->isVisible() && !DockArea->isAutoHide())
 		{
 			Splitter->show();
-			Splitter = internal::findParent<QSplitter*>(Splitter);
+			Splitter = internal::findParent<CDockSplitter*>(Splitter);
 		}
 
 		CDockContainerWidget* Container = DockArea->dockContainer();

src/ads_globals.h

@@ -268,7 +268,7 @@ T findParent(const QWidget* w)
 		}
 		parentWidget = parentWidget->parentWidget();
 	}
-	return 0;
+	return nullptr;
 }
 
 /**