SynthInternalFrameTitlePane.java 文件源码

protected void assembleSystemMenu() {
    systemPopupMenu = new JPopupMenuUIResource();
    addSystemMenuItems(systemPopupMenu);
    enableActions();
    menuButton = createNoFocusButton();
    updateMenuIcon();
    menuButton.addMouseListener(new MouseAdapter() {
        public void mousePressed(MouseEvent e) {
            try {
                frame.setSelected(true);
            } catch(PropertyVetoException pve) {
            }
            showSystemMenu();
        }
    });
    JPopupMenu p = frame.getComponentPopupMenu();
    if (p == null || p instanceof UIResource) {
        frame.setComponentPopupMenu(systemPopupMenu);
    }
    if (frame.getDesktopIcon() != null) {
        p = frame.getDesktopIcon().getComponentPopupMenu();
        if (p == null || p instanceof UIResource) {
            frame.getDesktopIcon().setComponentPopupMenu(systemPopupMenu);
        }
    }
    setInheritsPopupMenu(true);
}