我有一個JPopupMenu
其中包含一個內部JMenu
和addSeparator()
分隔符。由於一些奇怪的處理,我添加了一個MouseListener
到JPopupMenu
,這使得它在mouseExited
事件中不可見。這工作正常,除了當鼠標試圖跨過分隔符時,它觸發事件(即使JPopupMenu
是超級組件)。穿越內部分隔符時MouseExited事件觸發器?
如果我刪除addSeparator()
行,它按預期工作。
有什麼辦法可以解決這個問題嗎?或者我沒有正確設置聽衆?
的代碼是這樣的:
JPopupMenu popupMenu = new JPopupMenu();
JMenu innerMenu = new JMenu("Inner");
// ... add JMenuItems
popupMenu.add(innerMenu);
popupMenu.addSeparator();
popupMenu.add(new JMenuItem("Exit"));
popupMenu.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
popupMenu.setVisible(false);
}
});
全部可編譯例
只需評論,並取消對popupMenu.addSeparator()
線,以通知所述不同的行爲
public class Test {
public static void main(String[] args) throws Exception {
if(!SystemTray.isSupported()) {
throw new UnsupportedOperationException("SystemTray is not supported.");
}
final TrayIcon trayIcon = new TrayIcon(ImageIO.read(new File("resources/icon.gif")));
final JPopupMenu popupMenu = new JPopupMenu();
JMenu intervalMenu = new JMenu("Interval");
ButtonGroup itemGroup = new ButtonGroup();
JRadioButtonMenuItem oneSecondMenuItem = new JRadioButtonMenuItem("1 sec");
itemGroup.add(oneSecondMenuItem);
JRadioButtonMenuItem twoSecondMenuItem = new JRadioButtonMenuItem("2 sec");
itemGroup.add(twoSecondMenuItem);
intervalMenu.add(oneSecondMenuItem);
intervalMenu.add(twoSecondMenuItem);
popupMenu.add(intervalMenu);
popupMenu.addSeparator();
JMenuItem exitMenuItem = new JMenuItem("Exit");
exitMenuItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
SystemTray.getSystemTray().remove(trayIcon);
System.exit(0);
}
});
popupMenu.add(exitMenuItem);
//Thanks to Artem Ananiev for this implementation idea
//https://weblogs.java.net/blog/ixmal/archive/2006/05/using_jpopupmen.html
trayIcon.addMouseListener(new MouseAdapter() {
@Override
public void mouseReleased(MouseEvent e) {
if(e.getButton() == MouseEvent.BUTTON3) {
popupMenu.setLocation(e.getX() - 40, e.getY() - 40);
popupMenu.setInvoker(popupMenu);
popupMenu.setVisible(true);
}
}
});
popupMenu.addMouseListener(new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
popupMenu.setVisible(false);
}
});
SystemTray.getSystemTray().add(trayIcon);
}
}
安置自己的'SSCCE'演示該問題。 – camickr
@camickr完成。儘可能簡潔,儘管這是一個複雜的設置。 – asteri