Cancel preview jobs without blocking

Makes for more reponsive map updates
qgis · Jul 14, 2017 · 306c5b3 · 306c5b3
1 parent d0fd38f
commit 306c5b3
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/gui/qgsmapcanvas.cpp b/src/gui/qgsmapcanvas.cpp
@@ -2171,9 +2171,10 @@ void QgsMapCanvas::stopPreviewJobs()
   {
     if ( *it )
     {
-      ( *it )->cancel();
+      disconnect( *it, &QgsMapRendererJob::finished, this, &QgsMapCanvas::previewJobFinished );
+      connect( *it, &QgsMapRendererQImageJob::finished, *it, &QgsMapRendererQImageJob::deleteLater );
+      ( *it )->cancelWithoutBlocking();
     }
-    delete ( *it );
   }
   mPreviewJobs.clear();
 }