Avoid multiple redraws if loading projects

mhugent · mhugent · commit c0b720805b5f · 2012-04-03T18:48:10.000+02:00
diff --git a/src/app/legend/qgslegend.cpp b/src/app/legend/qgslegend.cpp
@@ -2037,6 +2037,7 @@ void QgsLegend::handleItemChange( QTreeWidgetItem* item, int column )
 
   bool changing = mChanging;
   mChanging = true;
+  bool mapCanvasFrozen = mMapCanvas->isFrozen(); //save freeze state
 
   if ( !changing )
   {
@@ -2091,7 +2092,7 @@ void QgsLegend::handleItemChange( QTreeWidgetItem* item, int column )
   {
     // If it was on, turn it back on, otherwise leave it
     // off, as turning it on causes a refresh.
-    mMapCanvas->freeze( false );
+    mMapCanvas->freeze( mapCanvasFrozen );
 
     // update layer set
     updateMapCanvasLayerSet();

Original file line number	Diff line number	Diff line change
`@@ -2037,6 +2037,7 @@ void QgsLegend::handleItemChange( QTreeWidgetItem* item, int column )`
`2037`	`2037`
`2038`	`2038`	`bool changing = mChanging;`
`2039`	`2039`	`mChanging = true;`
	`2040`	`+ bool mapCanvasFrozen = mMapCanvas->isFrozen(); //save freeze state`
`2040`	`2041`
`2041`	`2042`	`if ( !changing )`
`2042`	`2043`	`{`
`@@ -2091,7 +2092,7 @@ void QgsLegend::handleItemChange( QTreeWidgetItem* item, int column )`
`2091`	`2092`	`{`
`2092`	`2093`	`// If it was on, turn it back on, otherwise leave it`
`2093`	`2094`	`// off, as turning it on causes a refresh.`
`2094`		`- mMapCanvas->freeze( false );`
	`2095`	`+ mMapCanvas->freeze( mapCanvasFrozen );`
`2095`	`2096`
`2096`	`2097`	`// update layer set`
`2097`	`2098`	`updateMapCanvasLayerSet();`