public boolean handleEvent(Event evt) {
switch (evt.id) {
  case Event.MOUSE_ENTER:
    return mouseEnter(evt, evt.x, evt.y);

  case Event.MOUSE_EXIT:
    return mouseExit(evt, evt.x, evt.y);

  case Event.MOUSE_MOVE:
    return mouseMove(evt, evt.x, evt.y);

  case Event.MOUSE_DOWN:
    return mouseDown(evt, evt.x, evt.y);

  case Event.MOUSE_DRAG:
    return mouseDrag(evt, evt.x, evt.y);

  case Event.MOUSE_UP:
    return mouseUp(evt, evt.x, evt.y);

  case Event.KEY_PRESS:
  case Event.KEY_ACTION:
    return keyDown(evt, evt.key);

  case Event.KEY_RELEASE:
  case Event.KEY_ACTION_RELEASE:
    return keyUp(evt, evt.key);
    
  case Event.ACTION_EVENT:
    return action(evt, evt.arg);
  case Event.GOT_FOCUS:
    return gotFocus(evt, evt.arg);
  case Event.LOST_FOCUS:
    return lostFocus(evt, evt.arg);
}
return false;
}