QGIS » QGIS Application

Index: src/gui/qgsmapcanvasmap.cpp

===================================================================

--- src/gui/qgsmapcanvasmap.cpp	(revision 9954)

+++ src/gui/qgsmapcanvasmap.cpp	(working copy)

@@ -48,6 +48,8 @@

 void QgsMapCanvasMap::resize( QSize size )

 {

+  prepareGeometryChange();	// to keep QGraphicsScene indexes up to date on size change

+

   mPixmap = QPixmap( size );

   mImage = QImage( size, QImage::Format_RGB32 );	// temporary image - build it here so it is available when switching from QPixmap to QImage rendering

   mCanvas->mapRenderer()->setOutputSize( size, mPixmap.logicalDpiX() );

Index: src/gui/qgsmapcanvas.cpp

===================================================================

--- src/gui/qgsmapcanvas.cpp	(revision 9954)

+++ src/gui/qgsmapcanvas.cpp	(working copy)

@@ -811,8 +811,8 @@

     int height = lastSize.height();

     lastSize = QSize( -1, -1 );

-    //set map size before scene size seems to solve the white box problem

-    //when moving rubber bands

+    //set map size before scene size helps keep scene indexes updated properly

+    // this was the cause of rubberband artifacts

     mMap->resize( QSize( width, height ) );

     mScene->setSceneRect( QRectF( 0, 0, width, height ) );