added Method QgsRenderer::containsPixmap

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5312 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/core/qgsrenderer.cpp

@@ -60,3 +60,15 @@ void QgsRenderer::refreshLegend(std::list< std::pair<QString, QPixmap> >* symbol
     }
 }
 
+bool QgsRenderer::containsPixmap() const
+{
+  //default implementation returns true only for points
+  switch(mVectorType)
+    {
+    case QGis::Point:
+       return true;
+    default:
+      return false;
+    }
+}
+

src/core/qgsrenderer.h

@@ -78,6 +78,8 @@ class QgsRenderer
     virtual void refreshLegend(std::list< std::pair<QString, QPixmap> >* symbologyList) const;
     /**Returns a copy of the renderer (a deep copy on the heap)*/
     virtual QgsRenderer* clone() const=0;
+    /**Returns true if this renderer returns a pixmap in the render method (e.g. for point data or diagrams)*/
+    virtual bool containsPixmap() const;
     /**Color to draw selected features - static so we can change it in proj props and automatically 
        all renderers are updated*/
     static QColor mSelectionColor;