@Override
  public void showContentPopup(ListPopup listPopup) {
    final int width = comboLabel.getSize().width;
    listPopup.setMinimumSize(new Dimension(width, 0));
    listPopup.show(new RelativePoint(comboLabel, new Point(0, comboLabel.getHeight())));
  }
@Override
  public void showContentPopup(ListPopup listPopup)