Canvas now emits renderComplete signal when rendering of cnavas has completed, but before the screen is refreshed. Added accessor and mutators for the canvas pixmap.

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@1306 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/qgsmapcanvas.cpp

@@ -248,6 +248,12 @@ void QgsMapCanvas::render2(QPaintDevice * theQPaintDevice)
         }
       
       dirty = false;
+      
+      // notify any listeners that rendering is complete
+      //note that pmCanvas is not draw to gui yet
+      
+      emit renderComplete();
+      
       repaint();
     }
 }

src/qgsmapcanvas.h

@@ -48,6 +48,10 @@ Q_OBJECT public:
     QgsMapCanvas(QWidget * parent = 0, const char *name = 0);
     //! Destructor
     ~QgsMapCanvas();
+    //! Accessor for the cnavas pixmap
+    QPixmap * canvasPixmap() { return pmCanvas; } ;
+    //! Mutator for the canvas pixmap
+    void setCanvasPixmap(QPixmap * theQPixmap) { pmCanvas=theQPixmap; } ;
     //! Set the legend control to be used with this canvas
     void setLegend(QgsLegend *legend);
     //! Get a pointer to the legend control used with this canvas
@@ -129,6 +133,8 @@ signals:
     void scaleChanged(QString);  
     //! Emitted when the extents of the map change
     void extentsChanged(QString);  
+    //! Emitted when the canvas has rendered
+    void renderComplete();
 private:
     //! Overridden mouse move event
     void mouseMoveEvent(QMouseEvent * e);