Makes project mostly compatible with Qt 4.5

AdvancedDockingSystem/include/ads/API.h

@@ -37,15 +37,6 @@ enum DropArea
 };
 Q_DECLARE_FLAGS(DropAreas, DropArea)
 
-class InternalContentData
-{
-public:
-	InternalContentData() : titleWidget(0), contentWidget(0) {}
-	QSharedPointer<class SectionContent> content;
-	class SectionTitleWidget* titleWidget;
-	class SectionContentWidget* contentWidget;
-};
-
 void deleteEmptySplitter(class ContainerWidget* container);
 class ContainerWidget* findParentContainerWidget(class QWidget* w);
 class SectionWidget* findParentSectionWidget(class QWidget* w);

AdvancedDockingSystem/include/ads/ContainerWidget.h

@@ -16,6 +16,8 @@ class QMenu;
 
 ADS_NAMESPACE_BEGIN
 
+class InternalContentData;
+
 // ContainerWidget is the main container to provide the docking
 // functionality. It manages mulitple Sections and all possible areas.
 class ContainerWidget : public QFrame

AdvancedDockingSystem/include/ads/FloatingWidget.h

@@ -14,6 +14,7 @@ ADS_NAMESPACE_BEGIN
 class ContainerWidget;
 class SectionTitleWidget;
 class SectionContentWidget;
+class InternalContentData;
 
 // FloatingWidget holds and displays SectionContent as a floating window.
 // It can be resized, moved and dropped back into a SectionWidget.

AdvancedDockingSystem/include/ads/Internal.h

@@ -0,0 +1,26 @@
+#ifndef ADS_INTERNAL_HEADER
+#define ADS_INTERNAL_HEADER
+
+#include "ads/API.h"
+#include "ads/SectionContent.h"
+
+ADS_NAMESPACE_BEGIN
+class SectionContent;
+class SectionTitleWidget;
+class SectionContentWidget;
+
+
+class InternalContentData
+{
+public:
+	InternalContentData();
+	~InternalContentData();
+
+	SectionContent::RefPtr content;
+	SectionTitleWidget* titleWidget;
+	SectionContentWidget* contentWidget;
+};
+
+
+ADS_NAMESPACE_END
+#endif

AdvancedDockingSystem/include/ads/SectionWidget.h

@@ -17,6 +17,7 @@ ADS_NAMESPACE_BEGIN
 class ContainerWidget;
 class SectionTitleWidget;
 class SectionContentWidget;
+class InternalContentData;
 
 // SectionWidget manages multiple instances of SectionContent.
 // It displays a title TAB, which is clickable and will switch to