         }
         
         _anchorColumnIndex = value;
+        
+        anchorChanged = true;
+        invalidateProperties();
+        
         dispatchChangeEvent("anchorColumnIndexChanged");
     }
     

     */
    public function selectAll():Boolean
    {           
        const selectionChanged:Boolean = gridSelection.selectAll();
        if (selectionChanged)
        {               

        return dataProvider.getItemIndex(item);
    }
    
    /**
     *  @private
     */
    private function getVisibleItemRenderer(rowIndex:int, columnIndex:int):IVisualElement
