improved speed of drawing layer that's being edited

fixed one memory leak


git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5028 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/plugins/grass/qgsgrassedit.cpp

@@ -2004,22 +2004,25 @@ void QgsGrassEdit::postRender(QPainter *)
 
   if ( !mValid ) return;
 
-  displayMap(NULL);
+  displayMap();
 
   // Redisplay highlighted
   if ( mSelectedLine ) {
     displayElement ( mSelectedLine, mSymb[SYMB_HIGHLIGHT], mSize );
   }
 }
 
-void QgsGrassEdit::displayMap (QPainter *painter)
+void QgsGrassEdit::displayMap ()
 {
 #ifdef QGISDEBUG
   std::cerr << "QgsGrassEdit::displayMap" << std::endl;
 #endif
 
   mTransform = mCanvas->getCoordinateTransform();
 
+  QPainter *painter = new QPainter();
+  painter->begin(mPixmap);
+  
   // Display lines
   int nlines = mProvider->numLines(); 
 
@@ -2042,6 +2045,9 @@ void QgsGrassEdit::displayMap (QPainter *painter)
     }
   }
 
+  painter->end();
+  delete painter;
+  
   mCanvas->updateContents();
 //  mCanvas->repaint(false);
 }
@@ -2077,6 +2083,7 @@ void QgsGrassEdit::displayUpdated (void)
   }
 
   painter->end();
+  delete painter;
 
   mCanvas->updateContents();
 //  mCanvas->repaint(false);

src/plugins/grass/qgsgrassedit.h

@@ -204,7 +204,7 @@ public slots:
     int mSize;
 
     //! Display all lines and nodes
-    void displayMap (QPainter *painter); 
+    void displayMap (); 
 
     /** 
      *  Display icon