Reverse iterate through the map layers when rendering. Fixes #536.

homann · homann · commit d969ca1788e8 · 2007-01-13T12:02:18.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6427 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/core/qgsmaprender.cpp b/src/core/qgsmaprender.cpp
@@ -210,9 +210,9 @@ void QgsMapRender::render(QPainter* painter)
 #endif
 
   // render all layers in the stack, starting at the base
-  std::deque<QString>::iterator li = mLayerSet.begin();
+  std::deque<QString>::reverse_iterator li = mLayerSet.rbegin();
   
-  while (li != mLayerSet.end())
+  while (li != mLayerSet.rend())
   {
     QgsDebugMsg("Rendering at layer item " + (*li));
 
@@ -289,8 +289,8 @@ void QgsMapRender::render(QPainter* painter)
   if (!mOverview)
   {
     // render all labels for vector layers in the stack, starting at the base
-    li = mLayerSet.begin();
-    while (li != mLayerSet.end())
+    li = mLayerSet.rbegin();
+    while (li != mLayerSet.rend())
     {
       // TODO: emit drawingProgress((myRenderCounter++),zOrder.size());
       QgsMapLayer *ml = QgsMapLayerRegistry::instance()->mapLayer(*li);

Original file line number	Diff line number	Diff line change
`@@ -210,9 +210,9 @@ void QgsMapRender::render(QPainter* painter)`
`210`	`210`	`#endif`
`211`	`211`
`212`	`212`	`// render all layers in the stack, starting at the base`
`213`		`- std::deque<QString>::iterator li = mLayerSet.begin();`
	`213`	`+ std::deque<QString>::reverse_iterator li = mLayerSet.rbegin();`
`214`	`214`
`215`		`- while (li != mLayerSet.end())`
	`215`	`+ while (li != mLayerSet.rend())`
`216`	`216`	`{`
`217`	`217`	`QgsDebugMsg("Rendering at layer item " + (*li));`
`218`	`218`
`@@ -289,8 +289,8 @@ void QgsMapRender::render(QPainter* painter)`
`289`	`289`	`if (!mOverview)`
`290`	`290`	`{`
`291`	`291`	`// render all labels for vector layers in the stack, starting at the base`
`292`		`- li = mLayerSet.begin();`
`293`		`- while (li != mLayerSet.end())`
	`292`	`+ li = mLayerSet.rbegin();`
	`293`	`+ while (li != mLayerSet.rend())`
`294`	`294`	`{`
`295`	`295`	`// TODO: emit drawingProgress((myRenderCounter++),zOrder.size());`
`296`	`296`	`QgsMapLayer ml = QgsMapLayerRegistry::instance()->mapLayer(li);`