MacButtonlessScrollbarUI.java 文件源码

protected MacButtonlessScrollbarUI() {
  myMouseMotionListener = new MouseMotionAdapter() {
    @Override
    public void mouseMoved(MouseEvent e) {
      boolean inside = isOverThumb(e.getPoint());
      if (inside != myMouseIsOverThumb) {
        myMouseIsOverThumb = inside;
        e.getComponent().repaint();
      }
    }
  };

  myMouseListener = new MouseAdapter() {
    @Override
    public void mouseExited(MouseEvent e) {
      if (myMouseIsOverThumb) {
        myMouseIsOverThumb = false;
        e.getComponent().repaint();
      }
    }
  };
}