/** Called when user deselect action in action panel */
 public void deselect() {
   if (gridLayer != null) {
     client.getGridPanel().clearActionDecorations();
     gridLayer = null;
   }
 }
 /** Called when user select action in action panel */
 public void select() {
   gridLayer = createGridLayer();
   if (gridLayer != null) {
     client.getGridPanel().addLayer(gridLayer);
   }
 }