4

这个问题与这个问题类似。我所拥有的是JPopupMenu从系统托盘上的图标弹出的。此时，系统托盘是程序的唯一体现。也就是说，没有其他窗口打开，系统托盘中的图标是我访问该程序的唯一途径。我JPopupMenu在 AWT 上使用 a 是PopupMenu因为我想将系统外观应用到弹出菜单 - 当我只使用一个普通的时PopupMenu，我无法获得系统的外观和感觉，我只是不断地获得 Swing 的金属外观。我使用此解决方法来获得此行为（在此处描述）：

systemTrayPopupMenu = buildSystemTrayJPopupMenu();
trayIcon = new TrayIcon(iconImage, "Application Name", null /* Popup Menu */);
trayIcon.addMouseListener (new MouseAdapter () {
    @Override
    public void mouseReleased (MouseEvent me) {
        if (me.isPopupTrigger()) {
            systemTrayPopupMenu.setLocation(me.getX(), me.getY());
            systemTrayPopupMenu.setInvoker(systemTrayPopupMenu);
            systemTrayPopupMenu.setVisible(true);
        }
    }
};

当我右键单击托盘图标时，它会显示菜单，当我进行选择时，菜单自然会消失。但是，当我调出菜单然后单击它时，它并没有消失。要使其当前消失，我必须进行选择，或者选择已禁用的菜单项之一。

我尝试向其中添加 a FocusListener，但是，没有迹象表明focusLostorfocusGained方法曾经被调用过。此外，当另一个获得焦点时，我不能让它消失，Window因为没有其他窗口存在。由于此弹出菜单来自 aTrayIcon而不是典型按钮，因此我无法使用此处提到的解决方案来解决FocusListenernot calling focusLost。

最终，我想知道的是： 1
）有没有办法让系统的外观和感觉适合正常的 AWT PopupMenu？，或者
2）有没有办法JPopupMenu在失去焦点时让它消失？

编辑：根据要求，这是我的SSCCE：

import java.awt.*;
import java.awt.event.*;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.*;

public class SwingSystemTray {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run () {
            try {
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                new SwingSystemTray ();
            } catch (Exception e) {
                System.out.println("Not using the System UI defeats the purpose...");
                e.printStackTrace();
            }
        }
    });
}

protected SystemTray systemTray;
protected TrayIcon trayIcon;
protected JPopupMenu systemTrayPopupMenu;
protected Image iconImage;

public SwingSystemTray () throws IOException {
    iconImage = getIcon ();
    if (SystemTray.isSupported()) {
        systemTray = SystemTray.getSystemTray();
        systemTrayPopupMenu = buildSystemTrayJPopupMenu();
        trayIcon = new TrayIcon(iconImage, "Application Name", null /* Popup Menu */);
        trayIcon.addMouseListener (new MouseAdapter () {
            @Override
            public void mouseReleased (MouseEvent me) {
                if (me.isPopupTrigger()) {
                    systemTrayPopupMenu.setLocation(me.getX(), me.getY());
                    systemTrayPopupMenu.setInvoker(systemTrayPopupMenu);
                    systemTrayPopupMenu.setVisible(true);
                }
            }
        });
        try {
            systemTray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("Could not place item at tray.  Exiting.");
        }
    }
}

protected JPopupMenu buildSystemTrayJPopupMenu () {
    final JPopupMenu menu = new JPopupMenu ();
    final JMenuItem showMenuItem = new JMenuItem("Show");
    final JMenuItem hideMenuItem = new JMenuItem("Hide");
    final JMenuItem exitMenuItem = new JMenuItem("Exit");
    hideMenuItem.setEnabled(false);
    ActionListener listener = new ActionListener () {
        @Override
        public void actionPerformed (ActionEvent ae) {
            Object source = ae.getSource();
            if (source == showMenuItem) {
                System.out.println("Shown");
                showMenuItem.setEnabled(false);
                hideMenuItem.setEnabled(true);
           }
           else if (source == hideMenuItem) {
                System.out.println("Hidden");
                hideMenuItem.setEnabled(false);
                showMenuItem.setEnabled(true);
            }
            else if (source == exitMenuItem) {
                System.exit(0);
            }
        }
    };
    for (JMenuItem item : new JMenuItem [] {showMenuItem, hideMenuItem, exitMenuItem}) {
        if (item == exitMenuItem) menu.addSeparator();
        menu.add(item);
        item.addActionListener(listener);
    }
    return menu;
}

protected Image getIcon () throws IOException {
    // Build the 16x16 image programmatically, start with BMP Header
    byte [] iconData = new byte[822];
    System.arraycopy(new byte [] {0x42,0x4d,0x36,0x03, 0,0,0,0, 0,0,0x36,0, 
            0,0,0x28,0, 0,0,16,0, 0,0,16,0, 0,0,16,0, 24,0,0,0, 0,0,0,3},
            0, iconData, 0, 36);
    for (int i = 36; i < 822; iconData[i++] = 0);
    for (int i = 56; i < 822; i += 3) iconData[i] = -1;     
    return ImageIO.read(new java.io.ByteArrayInputStream(iconData));
}
}
4

3 回答 3

4

我发现了一个我觉得会很好用的 hack。我还没有在 Windows XP 中对其进行测试，但它可以在 Windows 7 中运行。这涉及添加一个显示在弹出菜单后面的“隐藏对话框”，就好像弹出菜单最初来自隐藏对话框一样。唯一真正的技巧是让隐藏的对话框留在弹出菜单后面。至少在 Windows 7 中，它显示在系统托盘后面，因此您一开始就不会真正看到它。可以将AWindowFocusListener添加到此隐藏对话框中，因此当您单击弹出菜单外时，您也单击了隐藏对话框外。我已将此功能添加到SSCCE我之前发布的内容中，以说明添加此功能的工作原理：

package org.test;

import java.awt.*;
import java.awt.event.*;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.*;

public class SwingSystemTray {

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run () {
            try {
                /* We are going for the Windows Look and Feel here */
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                new SwingSystemTray ();
            } catch (Exception e) {
                System.out.println("Not using the System UI defeats the purpose...");
                e.printStackTrace();
            }
        }
    });
}

protected SystemTray systemTray;
protected TrayIcon trayIcon;
protected JPopupMenu systemTrayPopupMenu;
protected Image iconImage;
/* Added a "hidden dialog" */
protected JDialog hiddenDialog;

public SwingSystemTray () throws IOException {
    iconImage = getIcon ();
    if (SystemTray.isSupported()) {
        systemTray = SystemTray.getSystemTray();
        systemTrayPopupMenu = buildSystemTrayJPopupMenu();
        trayIcon = new TrayIcon(iconImage, "Application Name", null /* Popup Menu */);
        trayIcon.addMouseListener (new MouseAdapter () {
            @Override
            public void mouseReleased (MouseEvent me) {
                if (me.isPopupTrigger()) {
                    systemTrayPopupMenu.setLocation(me.getX(), me.getY());
                    /* Place the hidden dialog at the same location */
                    hiddenDialog.setLocation(me.getX(), me.getY());
                    /* Now the popup menu's invoker is the hidden dialog */
                    systemTrayPopupMenu.setInvoker(hiddenDialog);
                    hiddenDialog.setVisible(true);
                    systemTrayPopupMenu.setVisible(true);
                }
            }
        });
        trayIcon.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed (ActionEvent ae) {
                System.out.println("actionPerformed");
            }
        });
        try {
            systemTray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("Could not place item at tray.  Exiting.");
        }
    }
    /* Initialize the hidden dialog as a headless, titleless dialog window */
    hiddenDialog = new JDialog ();
    hiddenDialog.setSize(10, 10);
    /* Add the window focus listener to the hidden dialog */
    hiddenDialog.addWindowFocusListener(new WindowFocusListener () {
        @Override
        public void windowLostFocus (WindowEvent we ) {
            hiddenDialog.setVisible(false);
        }
        @Override
        public void windowGainedFocus (WindowEvent we) {}
    });
}

protected JPopupMenu buildSystemTrayJPopupMenu () {
    final JPopupMenu menu = new JPopupMenu ();
    final JMenuItem showMenuItem = new JMenuItem("Show");
    final JMenuItem hideMenuItem = new JMenuItem("Hide");
    final JMenuItem exitMenuItem = new JMenuItem("Exit");
    hideMenuItem.setEnabled(false);
    ActionListener listener = new ActionListener () {
        @Override
        public void actionPerformed (ActionEvent ae) {
            /* We want to make sure the hidden dialog goes away after selection */
            hiddenDialog.setVisible(false);
            Object source = ae.getSource();
            if (source == showMenuItem) {
                System.out.println("Shown");
                showMenuItem.setEnabled(false);
                hideMenuItem.setEnabled(true);
            }
            else if (source == hideMenuItem) {
                System.out.println("Hidden");
                hideMenuItem.setEnabled(false);
                showMenuItem.setEnabled(true);
            }
            else if (source == exitMenuItem) {
                System.exit(0);
            }
        }
    };
    for (JMenuItem item : new JMenuItem [] {showMenuItem, hideMenuItem, exitMenuItem}) {
        if (item == exitMenuItem) menu.addSeparator();
        menu.add(item);
        item.addActionListener(listener);
    }
    return menu;
}

protected Image getIcon () throws IOException {
    // Build the 16x16 image programmatically, start with BMP Header
    byte [] iconData = new byte[822];
    System.arraycopy(new byte [] {0x42,0x4d,0x36,0x03, 0,0,0,0, 0,0,0x36,0, 
            0,0,0x28,0, 0,0,16,0, 0,0,16,0, 0,0,16,0, 24,0,0,0, 0,0,0,3},
            0, iconData, 0, 36);
    for (int i = 36; i < 822; iconData[i++] = 0);
    for (int i = 56; i < 822; i += 3) iconData[i] = -1;        
    return ImageIO.read(new java.io.ByteArrayInputStream(iconData));
}
}

该解决方案为我提供了我一直在寻找的要求#2，即JPopupMenu当它失去对使用 Windows 系统外观的系统托盘的关注时，它会消失。

注意：我还没有获得JPopupMenu在 CentOS/RedHat Linux 系统托盘上工作的功能。对于那些，我将不得不使用普通的 AWT PopupMenu。

于 2013-11-19T18:32:59.000 回答
0

JPopupMenu 不能单独显示。那就是它需要被添加到一个窗口中。尝试使用 WindowListener，然后在 windowDeactivated() 事件上隐藏弹出窗口。弹出窗口可见后，您应该能够使用以下方法获取窗口：

Window window = SwingUtilities.windowForComonent(systemTrayPopupMenu);
于 2013-11-08T22:06:06.933 回答
0

我只是在 JPopup 菜单上使用了一个 MouseListener，它在鼠标退出时调用一个计时器线程；如果鼠标重新进入，我会重置“mouseStillOnMenu”标志。将“Thread.sleep() 值设置为您希望用户能够离开菜单的时间 - 如果您正常单击菜单项，则会调用默认菜单关闭行为并关闭菜单。

@Override
public void mouseEntered(MouseEvent arg0) {
    mouseStillOnMenu = true;

}

@Override
public void mouseExited(MouseEvent arg0) {
    mouseStillOnMenu = false;

    new Thread(new Runnable() {

        @Override
        public void run() {

            try {
                Thread.sleep(1000);  //waits one second before checking if mouse is still on the menu
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            if (!isMouseStillOnMenu()) {
                jpopup.setVisible(false);
            }

        }

    }).start();

}
于 2014-08-26T18:42:01.457 回答