fix #4694

qgis · Dec 25, 2011 · 14c58a5 · 14c58a5
1 parent fd2a80d
commit 14c58a5
Showing 1 changed file with 11 additions and 2 deletions.
diff --git a/src/gui/symbology-ng/qgsgraduatedsymbolrendererv2widget.cpp b/src/gui/symbology-ng/qgsgraduatedsymbolrendererv2widget.cpp
@@ -176,9 +176,18 @@ void QgsGraduatedSymbolRendererV2Widget::classifyGraduated()
     mode = QgsGraduatedSymbolRendererV2::Quantile;
 
   // create and set new renderer
+  QApplication::setOverrideCursor( Qt::WaitCursor );
+  QgsGraduatedSymbolRendererV2* r = QgsGraduatedSymbolRendererV2::createRenderer(
+                                      mLayer, attrName, classes, mode, mGraduatedSymbol, ramp );
+  QApplication::restoreOverrideCursor();
+  if ( !r )
+  {
+    QMessageBox::critical( this, tr( "Error" ), tr( "Renderer creation has failed." ) );
+    return;
+  }
+
   delete mRenderer;
-  mRenderer = QgsGraduatedSymbolRendererV2::createRenderer(
-                mLayer, attrName, classes, mode, mGraduatedSymbol, ramp );
+  mRenderer = r;
 
   populateRanges();
 }