WTrayIconPeer.java 文件源码

@Override
public synchronized void showPopupMenu(final int x, final int y) {
    if (isDisposed())
        return;

    SunToolkit.executeOnEventHandlerThread(target, () -> {
        PopupMenu newPopup = ((TrayIcon)target).getPopupMenu();
        if (popup != newPopup) {
            if (popup != null) {
                popupParent.remove(popup);
            }
            if (newPopup != null) {
                popupParent.add(newPopup);
            }
            popup = newPopup;
        }
        if (popup != null) {
            WPopupMenuPeer peer = AWTAccessor.getMenuComponentAccessor()
                                             .getPeer(popup);
            peer.show(popupParent, new Point(x, y));
        }
    });
}