Swing/DragLimitedSlider のバックアップ(No.1)

class MetalDragLimitedSliderUI extends MetalSliderUI {
  @Override protected TrackListener createTrackListener(JSlider slider) {
    return new TrackListener() {
      @Override public void mouseDragged(MouseEvent e) {
        //case HORIZONTAL:
        int halfThumbWidth = thumbRect.width / 2;
        int trackLength = trackRect.width;
        int trackLeft   = trackRect.x - halfThumbWidth;
        int maxPos = trackLeft + (int)(.5 + trackLength * MAXD);
        if (e.getX() > maxPos) {
          offset = 0;
          MouseEvent me = new MouseEvent(
            e.getComponent(), e.getID(), e.getWhen(), e.getModifiers(),
            maxPos, e.getY(),
            e.getXOnScreen(), e.getYOnScreen(),
            e.getClickCount(), e.isPopupTrigger(), e.getButton());
          e.consume();
          super.mouseDragged(me);
        } else {
          super.mouseDragged(e);
        }
      }
    };
  }
}