/**
  * Callback method called when the Form mode is changed.
  *
  * @param currentMode current Form mode
  */
 public void modeChanged(int currentMode) {
   if (currentMode == Consts.INSERT) {
     frame.getGrid().clearData();
     frame.setEnableGridButtons(false);
   } else {
     frame.setEnableGridButtons(true);
   }
 }