fix Qt warnings when overview is hidden

jef · jef · commit 54e9d456037d · 2009-07-29T08:58:16.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@11196 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/gui/qgsmapoverviewcanvas.cpp b/src/gui/qgsmapoverviewcanvas.cpp
@@ -242,6 +242,9 @@ void QgsMapOverviewCanvas::paintEvent( QPaintEvent * pe )
 
 void QgsMapOverviewCanvas::refresh()
 {
+  if ( mPixmap.isNull() )
+    return;
+
   mPixmap.fill( mBgColor ); //palette().color(backgroundRole());
 
   QPainter painter;

Original file line number	Diff line number	Diff line change
`@@ -242,6 +242,9 @@ void QgsMapOverviewCanvas::paintEvent( QPaintEvent * pe )`
`242`	`242`
`243`	`243`	`void QgsMapOverviewCanvas::refresh()`
`244`	`244`	`{`
	`245`	`+ if ( mPixmap.isNull() )`
	`246`	`+ return;`
	`247`	`+`
`245`	`248`	`mPixmap.fill( mBgColor ); //palette().color(backgroundRole());`
`246`	`249`
`247`	`250`	`QPainter painter;`