Fixed update of floating widget window title, make disabled close button look nicer, fixed restoring of floating dock container, change save and restore functionality of dock area to save the current dock widget name instead of the current index to ensure that the right dock widget is active in an area if the number of dock widgets changes for some reasons (i.e. in plugin based applications)

src/DockContainerWidget.cpp

@@ -759,8 +759,7 @@ CDockContainerWidget::CDockContainerWidget(CDockManager* DockManager, QWidget *p
 	QFrame(parent),
 	d(new DockContainerWidgetPrivate(this))
 {
-	d->isFloating = dynamic_cast<CFloatingDockContainer*>(parent) != 0;
-
+	d->isFloating = floatingWidget() != nullptr;
 	d->DockManager = DockManager;
 	if (DockManager != this)
 	{
@@ -986,8 +985,9 @@ void CDockContainerWidget::dropFloatingWidget(CFloatingDockContainer* FloatingWi
 	CDockAreaWidget* DockArea = dockAreaAt(TargetPos);
 	auto dropArea = InvalidDockWidgetArea;
 	auto ContainerDropArea = d->DockManager->containerOverlay()->dropAreaUnderCursor();
-	CDockWidget* TopLevelDockWidget = FloatingWidget->hasTopLevelDockWidget() ?
-		FloatingWidget->topLevelDockWidget() : nullptr;
+	CDockWidget* FloatingTopLevelDockWidget = FloatingWidget->topLevelDockWidget();
+	CDockWidget* TopLevelDockWidget = topLevelDockWidget();
+
 	if (DockArea)
 	{
 		auto dropOverlay = d->DockManager->dockAreaOverlay();
@@ -1017,12 +1017,19 @@ void CDockContainerWidget::dropFloatingWidget(CFloatingDockContainer* FloatingWi
 		}
 	}
 
-	// If we drop a floating widget with only one single dock widget, then we
-	// drop a top level widget that changes from floating to docked now
+	// If there was a top level widget before the drop, then it is not top
+	// level widget anymore
 	if (TopLevelDockWidget)
 	{
 		TopLevelDockWidget->emitTopLevelChanged(false);
 	}
+
+	// If we drop a floating widget with only one single dock widget, then we
+	// drop a top level widget that changes from floating to docked now
+	if (FloatingTopLevelDockWidget)
+	{
+		FloatingTopLevelDockWidget->emitTopLevelChanged(false);
+	}
 }
 
 
@@ -1052,7 +1059,7 @@ void CDockContainerWidget::saveState(QXmlStreamWriter& s) const
 	s.writeAttribute("Floating", QString::number(isFloating() ? 1 : 0));
 	if (isFloating())
 	{
-		CFloatingDockContainer* FloatingWidget = internal::findParent<CFloatingDockContainer*>(this);
+		CFloatingDockContainer* FloatingWidget = floatingWidget();
 		QByteArray Geometry = FloatingWidget->saveGeometry();
 		s.writeTextElement("Geometry", Geometry.toHex(' '));
 	}
@@ -1091,7 +1098,7 @@ bool CDockContainerWidget::restoreState(QXmlStreamReader& s, bool Testing)
 
 		if (!Testing)
 		{
-			CFloatingDockContainer* FloatingWidget = internal::findParent<CFloatingDockContainer*>(this);
+			CFloatingDockContainer* FloatingWidget = floatingWidget();
 			FloatingWidget->restoreGeometry(Geometry);
 		}
 	}
@@ -1118,6 +1125,40 @@ bool CDockContainerWidget::restoreState(QXmlStreamReader& s, bool Testing)
 	d->RootSplitter = dynamic_cast<QSplitter*>(NewRootSplitter);
 	OldRoot->deleteLater();
 
+    // All dock widgets, that have not been processed in the restore state
+    // function are invisible to the user now and have no assigned dock area
+    // They do not belong to any dock container, until the user toggles the
+    // toggle view action the next time
+	for (auto DockWidget : dockWidgets())
+    {
+    	if (DockWidget->property("dirty").toBool())
+    	{
+    		DockWidget->flagAsUnassigned();
+    	}
+    	else
+    	{
+    		DockWidget->toggleViewInternal(!DockWidget->property("closed").toBool());
+    	}
+    }
+
+    // Finally we need to send the topLevelChanged() signals for all dock
+    // widgets if top level changed
+	CDockWidget* TopLevelDockWidget = topLevelDockWidget();
+	if (TopLevelDockWidget)
+	{
+		TopLevelDockWidget->emitTopLevelChanged(true);
+	}
+	else
+	{
+		for (auto DockArea : d->DockAreas)
+		{
+			for (auto DockWidget : DockArea->dockWidgets())
+			{
+				DockWidget->emitTopLevelChanged(false);
+			}
+		}
+	}
+
 	return true;
 }
 
@@ -1150,6 +1191,11 @@ CDockAreaWidget* CDockContainerWidget::lastAddedDockAreaWidget(DockWidgetArea ar
 //============================================================================
 bool CDockContainerWidget::hasTopLevelDockWidget() const
 {
+	if (!isFloating())
+	{
+		return false;
+	}
+
 	auto DockAreas = openedDockAreas();
 	if (DockAreas.count() != 1)
 	{
@@ -1163,19 +1209,38 @@ bool CDockContainerWidget::hasTopLevelDockWidget() const
 //============================================================================
 CDockWidget* CDockContainerWidget::topLevelDockWidget() const
 {
-	auto DockAreas = openedDockAreas();
-	if (DockAreas.count() != 1)
+	auto TopLevelDockArea = topLevelDockArea();
+	if (!TopLevelDockArea)
 	{
 		return nullptr;
 	}
 
-	auto DockWidgets = DockAreas[0]->openedDockWidgets();
+	auto DockWidgets = TopLevelDockArea->openedDockWidgets();
 	if (DockWidgets.count() != 1)
 	{
 		return nullptr;
 	}
 
 	return DockWidgets[0];
+
+}
+
+
+//============================================================================
+CDockAreaWidget* CDockContainerWidget::topLevelDockArea() const
+{
+	if (!isFloating())
+	{
+		return nullptr;
+	}
+
+	auto DockAreas = openedDockAreas();
+	if (DockAreas.count() != 1)
+	{
+		return nullptr;
+	}
+
+	return DockAreas[0];
 }
 
 
@@ -1204,6 +1269,14 @@ CDockWidget::DockWidgetFeatures CDockContainerWidget::features() const
 	return Features;
 }
 
+
+//============================================================================
+CFloatingDockContainer* CDockContainerWidget::floatingWidget() const
+{
+	return internal::findParent<CFloatingDockContainer*>(this);
+}
+
+
 } // namespace ads
 
 #include "moc_DockContainerWidget.cpp"