Properly persist dock area HideSingleWidgetTitleBar flag (and all other dock area flags)

demo/MainWindow.cpp

@@ -400,8 +400,8 @@ void MainWindowPrivate::createContent()
 	ads::CDockComponentsFactory::setFactory(new CCustomComponentsFactory());
 	auto TopDockArea = DockManager->addDockWidget(ads::TopDockWidgetArea, FileSystemWidget);
 	// Uncomment the next line if you would like to test the
-	// setHideSingleWidgetTitleBar() functionality
+	// HideSingleWidgetTitleBar functionality
-	// TopDockArea->setHideSingleWidgetTitleBar(true);
+	// TopDockArea->setDockAreaFlag(ads::CDockAreaWidget::HideSingleWidgetTitleBar, true);
 	ads::CDockComponentsFactory::resetDefaultFactory();
 
 	// We create a calendar widget and clear all flags to prevent the dock area

src/DockAreaWidget.cpp

@@ -250,8 +250,8 @@ struct DockAreaWidgetPrivate
 	CDockManager*		DockManager		= nullptr;
 	bool UpdateTitleBarButtons = false;
 	DockWidgetAreas		AllowedAreas	= DefaultAllowedAreas;
-	bool HideSingleWidgetTitleBar		= false;
 	QSize MinSizeHint;
+	CDockAreaWidget::DockAreaFlags Flags{CDockAreaWidget::DefaultFlags};
 
 	/**
 	 * Private data constructor
@@ -747,7 +747,7 @@ void CDockAreaWidget::updateTitleBarVisibility()
 	{
 		bool Hidden = Container->hasTopLevelDockWidget() && (Container->isFloating()
 			|| CDockManager::testConfigFlag(CDockManager::HideSingleCentralWidgetTitleBar));
-		Hidden |= (d->HideSingleWidgetTitleBar && openDockWidgetsCount() == 1);
+		Hidden |= (d->Flags.testFlag(HideSingleWidgetTitleBar) && openDockWidgetsCount() == 1);
 		d->TitleBar->setVisible(!Hidden);
 	}
 }
@@ -772,12 +772,16 @@ void CDockAreaWidget::saveState(QXmlStreamWriter& s) const
 	auto CurrentDockWidget = currentDockWidget();
 	QString Name = CurrentDockWidget ? CurrentDockWidget->objectName() : "";
 	s.writeAttribute("Current", Name);
-	auto AllowedAreas = allowedAreas();
+	// To keep the saved XML data small, we only save the allowed areas and the
-	// To keep the saved XML data small, we only save the allowed areas if
+	// dock area flags if the values are different from the default values
-	// the value is different from the default value
+	if (d->AllowedAreas != DefaultAllowedAreas)
-	if (AllowedAreas != DefaultAllowedAreas)
 	{
-		s.writeAttribute("AllowedAreas", QString::number(AllowedAreas, 16));
+		s.writeAttribute("AllowedAreas", QString::number(d->AllowedAreas, 16));
+	}
+
+	if (d->Flags != DefaultFlags)
+	{
+		s.writeAttribute("Flags", QString::number(d->Flags, 16));
 	}
     ADS_PRINT("CDockAreaWidget::saveState TabCount: " << d->ContentsLayout->count()
             << " Current: " << Name);
@@ -872,12 +876,33 @@ DockWidgetAreas CDockAreaWidget::allowedAreas() const
 	return d->AllowedAreas;
 }
 
+
 //============================================================================
-void CDockAreaWidget::setHideSingleWidgetTitleBar(bool hide)
+CDockAreaWidget::DockAreaFlags CDockAreaWidget::dockAreaFlags() const
+{
+	return d->Flags;
+}
+
+
+//============================================================================
+void CDockAreaWidget::setDockAreaFlags(DockAreaFlags Flags)
+{
+	auto ChangedFlags = d->Flags ^ Flags;
+	d->Flags = Flags;
+	if (ChangedFlags.testFlag(HideSingleWidgetTitleBar))
 	{
-	d->HideSingleWidgetTitleBar = hide;
 		updateTitleBarVisibility();
 	}
+}
+
+
+//============================================================================
+void CDockAreaWidget::setDockAreaFlag(eDockAreaFlag Flag, bool On)
+{
+	auto flags = dockAreaFlags();
+	internal::setFlag(flags, Flag, On);
+	setDockAreaFlags(flags);
+}
 
 
 //============================================================================

src/DockAreaWidget.h

@@ -143,6 +143,16 @@ protected slots:
 public:
 	using Super = QFrame;
 
+	/**
+	 * Dock area related flags
+	 */
+	enum eDockAreaFlag
+	{
+		HideSingleWidgetTitleBar = 0x0001,
+		DefaultFlags = 0x0000
+	};
+	Q_DECLARE_FLAGS(DockAreaFlags, eDockAreaFlag)
+
 	/**
 	 * Default Constructor
 	 */
@@ -272,17 +282,30 @@ public:
 	 */
 	DockWidgetAreas allowedAreas() const;
 
-	/**
-	 * Will hide the title bar when set to true and there is only one
-	 * dock widget in this area
-	 */
-	void setHideSingleWidgetTitleBar(bool hide);
-
 	/**
 	 * Returns the title bar of this dock area
 	 */
 	CDockAreaTitleBar* titleBar() const;
 
+	/**
+	 * Returns the dock area flags - a combination of flags that configure the
+	 * appearance and features of the dock area.
+	 * \see setDockAreaFlasg()
+	 */
+	DockAreaFlags dockAreaFlags() const;
+
+	/**
+	 * Sets the dock area flags - a combination of flags that configure the
+	 * appearance and features of the dock area
+	 */
+	void setDockAreaFlags(DockAreaFlags Flags);
+
+	/**
+	 * Sets the dock area flag Flag on this widget if on is true; otherwise
+	 * clears the flag.
+	 */
+	void setDockAreaFlag(eDockAreaFlag Flag, bool On);
+
 public slots:
 	/**
 	 * This activates the tab for the given tab index.

src/DockContainerWidget.cpp

@@ -947,6 +947,12 @@ bool DockContainerWidgetPrivate::restoreDockArea(CDockingStateReader& s,
 		{
 			DockArea->setAllowedAreas((DockWidgetArea)AllowedAreasAttribute.toInt(nullptr, 16));
 		}
+
+		const auto FlagsAttribute = s.attributes().value("Flags");
+		if (!FlagsAttribute.isEmpty())
+		{
+			DockArea->setDockAreaFlags((CDockAreaWidget::DockAreaFlags)FlagsAttribute.toInt(nullptr, 16));
+		}
 	}
 
 	while (s.readNextStartElement())

src/DockManager.h

@@ -513,7 +513,7 @@ signals:
 
     /**
      * This signal is emitted just before the given dock widget is removed
-     * from the
+     * from the dock manager
      */
     void dockWidgetAboutToBeRemoved(ads::CDockWidget* DockWidget);