From Wang Rui, "The submission includes some fixes for osgQt library and osgQtWidgets example: (1) QTextEdit now works with mouse/drag events, (2) scrollbars will change when OSG window is resizing, (3) improve rendering efficiency of QGraphicsViewAdapter so that it works with complex Qt UI, (4) add new setBackgroundWidget() method to indicate a 'background widget', which will ignore mouse/key events on it and pass them to the 3D scene."

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14482 16af8721-9629-0410-8352-f15c8da7e697

include/osgQt/QGraphicsViewAdapter

@@ -52,6 +52,7 @@ class OSGQT_EXPORT QGraphicsViewAdapter : public QObject
 
         void clearWriteBuffer();
 
+        bool requiresRendering() const { return _requiresRendering; }
         void render();
 
         void assignImage(unsigned int i);
@@ -61,6 +62,12 @@ class OSGQT_EXPORT QGraphicsViewAdapter : public QObject
         void setBackgroundColor(QColor color) { _backgroundColor = color; }
         QColor getBackgroundColor() const     { return _backgroundColor; }
 
+        /** The 'background widget' will ignore mouse/keyboard events and let following handlers handle them
+            It is mainly used for integrating scene graph and full-screen UIs
+        */
+        void setBackgroundWidget(QWidget* w) { _backgroundWidget = w; }
+        QWidget* getBackgroundWidget() { return _backgroundWidget; }
+
         QGraphicsView* getQGraphicsView() { return _graphicsView; }
         QGraphicsScene* getQGraphicsScene() { return _graphicsScene; }
 
@@ -71,6 +78,7 @@ class OSGQT_EXPORT QGraphicsViewAdapter : public QObject
         QWidget* getWidgetAt(const QPoint& pos);
 
         osg::observer_ptr<osg::Image>   _image;
+        QWidget*                        _backgroundWidget;
 
         int                             _previousButtonMask;
         int                             _previousMouseX;
@@ -78,6 +86,7 @@ class OSGQT_EXPORT QGraphicsViewAdapter : public QObject
         int                             _previousQtMouseX;
         int                             _previousQtMouseY;
         bool                            _previousSentEvent;
+        bool                            _requiresRendering;
 
         int _width;
         int _height;

include/osgQt/QWebViewImage

@@ -66,9 +66,12 @@ class QWebViewImage : public osgWidget::BrowserImage
 
         void render()
         {
-            _adapter->render();
+            if (_adapter->requiresRendering()) _adapter->render();
         }
 
+        virtual bool requiresUpdateCall() const { return true; }
+        virtual void update( osg::NodeVisitor* nv ) { render(); }
+        
         virtual bool sendFocusHint(bool focus)
         {
             QFocusEvent event(focus ? QEvent::FocusIn : QEvent::FocusOut, Qt::OtherFocusReason);

include/osgQt/QWidgetImage

@@ -29,6 +29,8 @@ class OSGQT_EXPORT QWidgetImage : public osg::Image
         QWidget* getQWidget() { return _widget; }
         QGraphicsViewAdapter* getQGraphicsViewAdapter() { return _adapter; }
 
+        virtual bool requiresUpdateCall() const { return true; }
+        virtual void update( osg::NodeVisitor* nv ) { render(); }
 
         void clearWriteBuffer();