fix #1257

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@9217 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/plugins/grid_maker/graticulecreator.cpp

@@ -50,7 +50,7 @@ GraticuleCreator::~GraticuleCreator()
 {
 }
 
-//TODO: check for rediculous intervals!
+//TODO: check for ridiculous intervals!
 void GraticuleCreator::generatePointGraticule(
   double theXInterval,
   double theYInterval,
@@ -68,6 +68,10 @@ void GraticuleCreator::generatePointGraticule(
                                 mFields,
                                 QGis::WKBPoint,
                                 &mCRS );
+
+  if( theXInterval==0.0 || theYInterval==0.0 )
+    return;
+
   //
   // Order our loop so that it goes from smallest to biggest
   //

src/plugins/grid_maker/plugingui.cpp

@@ -56,6 +56,14 @@ void QgsGridMakerPluginGui::on_buttonBox_accepted()
 
   double myXInterval =  leXInterval->text().toDouble();
   double myYInterval =  leYInterval->text().toDouble();
+
+  if( myXInterval==0.0 || myYInterval==0.0 )
+  {
+    QMessageBox::warning( 0, tr( "QGIS - Grid Maker" ),
+                          QString( tr( "Please enter intervals before pressing OK!" ) ) );
+    return;
+  }
+
   double myXOrigin =  leXLowerLeft->text().toDouble();
   double myYOrigin =  leYLowerLeft->text().toDouble();
   double myEndPointX = leXUpperRight->text().toDouble();