View2D.java 文件源码

private void showTipPopupMenu(String msg, int x, int y, int time) {
    if (tipPopupMenu == null) {
        tipPopupMenu = new JPopupMenu("Tip");
        tipPopupMenu.setBorder(BorderFactory.createLineBorder(Color.black));
        tipPopupMenu.setBackground(SystemColor.info);
        JLabel l = new JLabel(msg);
        l.setFont(new Font(null, Font.PLAIN, 10));
        l.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));
        tipPopupMenu.add(l);
    } else {
        ((JLabel) tipPopupMenu.getComponent(0)).setText(msg);
    }
    tipPopupMenu.show(this, x, y);
    if (time > 0) {
        Timer timer = new Timer(time, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                tipPopupMenu.setVisible(false);
            }
        });
        timer.setRepeats(false);
        timer.setInitialDelay(time);
        timer.start();
    }
}