Added CDockComponentsFactory for creation of components for the docking framework

CMakeLists.txt

@@ -42,6 +42,7 @@ set(ads_SRCS
     src/FloatingDockContainer.cpp
 	src/FloatingDragPreview.cpp
 	src/IconProvider.cpp
+	src/DockComponentsFactory.cpp
     src/ads.qrc
     src/linux/FloatingWidgetTitleBar.cpp
 )
@@ -61,6 +62,7 @@ set(ads_INSTALL_INCLUDE
     src/FloatingDockContainer.h
 	src/FloatingDragPreview.h
 	src/IconProvider.h
+	src/DockComponentsFactory.h
     src/linux/FloatingWidgetTitleBar.h
 )
 if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")

src/DockAreaTitleBar.cpp

@@ -49,6 +49,7 @@
 #include "DockWidgetTab.h"
 #include "DockAreaTabBar.h"
 #include "IconProvider.h"
+#include "DockComponentsFactory.h"
 
 #include <iostream>
 
@@ -273,7 +274,7 @@ void DockAreaTitleBarPrivate::createButtons()
 //============================================================================
 void DockAreaTitleBarPrivate::createTabBar()
 {
-	TabBar = new CDockAreaTabBar(DockArea);
+	TabBar = componentsFactory()->createDockAreaTabBar(DockArea);
     TabBar->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred);
 	Layout->addWidget(TabBar);
 	_this->connect(TabBar, SIGNAL(tabClosed(int)), SLOT(markTabsMenuOutdated()));

src/DockAreaWidget.cpp

@@ -28,9 +28,10 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include "DockWidgetTab.h"
 #include "DockAreaWidget.h"
 
+#include <iostream>
+
 #include <QStackedLayout>
 #include <QScrollBar>
 #include <QScrollArea>
@@ -53,8 +54,8 @@
 #include "DockAreaTabBar.h"
 #include "DockSplitter.h"
 #include "DockAreaTitleBar.h"
-
-#include <iostream>
+#include "DockComponentsFactory.h"
+#include "DockWidgetTab.h"
 
 
 namespace ads
@@ -317,7 +318,7 @@ DockAreaWidgetPrivate::DockAreaWidgetPrivate(CDockAreaWidget* _public) :
 //============================================================================
 void DockAreaWidgetPrivate::createTitleBar()
 {
-	TitleBar = new CDockAreaTitleBar(_this);
+	TitleBar = componentsFactory()->createDockAreaTitleBar(_this);
 	Layout->addWidget(TitleBar);
 	QObject::connect(tabBar(), &CDockAreaTabBar::tabCloseRequested, _this, &CDockAreaWidget::onTabCloseRequested);
 	QObject::connect(TitleBar, &CDockAreaTitleBar::tabBarClicked, _this, &CDockAreaWidget::setCurrentIndex);

src/DockComponentsFactory.cpp

@@ -0,0 +1,61 @@
+//============================================================================
+/// \file   DockComponentsFactory.cpp
+/// \author Uwe Kindler
+/// \date   10.02.2020
+/// \brief  Implementation of DockComponentsFactory
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+#include <DockComponentsFactory.h>
+#include <QScopedPointer>
+
+#include "DockWidgetTab.h"
+#include "DockAreaTabBar.h"
+#include "DockAreaTitleBar.h"
+#include "DockWidget.h"
+#include "DockAreaWidget.h"
+
+namespace ads
+{
+static QScopedPointer<CDockComponentsFactory> DefaultFactory(new CDockComponentsFactory());
+
+
+//============================================================================
+CDockWidgetTab* CDockComponentsFactory::createDockWidgetTab(CDockWidget* DockWidget) const
+{
+	return new CDockWidgetTab(DockWidget);
+}
+
+
+//============================================================================
+CDockAreaTabBar* CDockComponentsFactory::createDockAreaTabBar(CDockAreaWidget* DockArea) const
+{
+	return new CDockAreaTabBar(DockArea);
+}
+
+
+//============================================================================
+CDockAreaTitleBar* CDockComponentsFactory::createDockAreaTitleBar(CDockAreaWidget* DockArea) const
+{
+	return new CDockAreaTitleBar(DockArea);
+}
+
+
+//============================================================================
+const CDockComponentsFactory* CDockComponentsFactory::defaultFactory()
+{
+	return DefaultFactory.get();
+}
+
+
+//============================================================================
+void CDockComponentsFactory::setDefaultFactory(CDockComponentsFactory* Factory)
+{
+	DefaultFactory.reset(Factory);
+}
+} // namespace ads
+
+//---------------------------------------------------------------------------
+// EOF DockComponentsFactory.cpp

src/DockComponentsFactory.h

@@ -0,0 +1,69 @@
+#ifndef DockComponentsFactoryH
+#define DockComponentsFactoryH
+//============================================================================
+/// \file   DockComponentsFactory.h
+/// \author Uwe Kindler
+/// \date   10.02.2020
+/// \brief  Declaration of DockComponentsFactory
+//============================================================================
+
+//============================================================================
+//                                   INCLUDES
+//============================================================================
+namespace ads
+{
+class CDockWidgetTab;
+class CDockAreaTitleBar;
+class CDockAreaTabBar;
+class CDockAreaWidget;
+class CDockWidget;
+
+
+
+/**
+ * Factory for creation of certain GUI elements for the docking framework.
+ * A default unique instance provided by CDockComponentsFactory is used for
+ * creation of all supported components. To inject your custom components,
+ * you can create your own derived dock components factory and register
+ * it via setDefaultFactory() function.
+ * \code
+ * CDockComponentsFactory::setDefaultFactory(new MyComponentsFactory()));
+ * \endcode
+ */
+class CDockComponentsFactory
+{
+public:
+	/**
+	 * Force virtual destructor
+	 */
+	virtual ~CDockComponentsFactory() {}
+
+	virtual CDockWidgetTab* createDockWidgetTab(CDockWidget* DockWidget) const;
+	virtual CDockAreaTabBar* createDockAreaTabBar(CDockAreaWidget* DockArea) const;
+	virtual CDockAreaTitleBar* createDockAreaTitleBar(CDockAreaWidget* DockArea) const;
+
+	/**
+	 * Returns the default components factory
+	 */
+	static const CDockComponentsFactory* defaultFactory();
+
+	/**
+	 * Sets a new default factory for creation of GUI elements.
+	 * This function takes ownership of the given Factory.
+	 */
+	static void setDefaultFactory(CDockComponentsFactory* Factory);
+};
+
+
+/**
+ * Convenience function to ease factory instance access
+ */
+inline const CDockComponentsFactory* componentsFactory()
+{
+	return CDockComponentsFactory::defaultFactory();
+}
+
+} // namespace ads
+
+//---------------------------------------------------------------------------
+#endif // DockComponentsFactoryH

src/DockManager.h

@@ -59,6 +59,7 @@ class CDockWidgetTab;
 struct DockWidgetTabPrivate;
 struct DockAreaWidgetPrivate;
 class CIconProvider;
+class CDockComponentsFactory;
 
 /**
  * The central dock manager that maintains the complete docking system.

src/DockWidget.cpp

@@ -54,6 +54,7 @@
 #include "DockManager.h"
 #include "FloatingDockContainer.h"
 #include "DockSplitter.h"
+#include "DockComponentsFactory.h"
 #include "ads_globals.h"
 
 
@@ -220,7 +221,7 @@ CDockWidget::CDockWidget(const QString &title, QWidget *parent) :
 	setWindowTitle(title);
 	setObjectName(title);
 
-	d->TabWidget = new CDockWidgetTab(this);
+	d->TabWidget = componentsFactory()->createDockWidgetTab(this);
     d->ToggleViewAction = new QAction(title, this);
 	d->ToggleViewAction->setCheckable(true);
 	connect(d->ToggleViewAction, SIGNAL(triggered(bool)), this,

src/src.pro

@@ -43,7 +43,8 @@ HEADERS += \
     DockSplitter.h \
     DockAreaTitleBar.h \
     ElidingLabel.h \
-    IconProvider.h
+    IconProvider.h \
+    DockComponentsFactory.h 
 
 
 SOURCES += \
@@ -61,7 +62,8 @@ SOURCES += \
     DockSplitter.cpp \
     DockAreaTitleBar.cpp \
     ElidingLabel.cpp \
-    IconProvider.cpp
+    IconProvider.cpp \
+    DockComponentsFactory.cpp
 
 
 unix {