如何在Java中从系统托盘中弹出JFrame

时间:2012-08-26 19:37:31

标签: java windows swing jframe system-tray

我能用Java创建一个系统托盘应用程序,但我在定位方面遇到了麻烦。该程序只需要处理一些输入/输出,因此我希望它易于访问。

我的问题是,当我点击应用程序的系统托盘图标时,如何在系统托盘上方优雅地设置它?无论显示设置(分辨率,多显示器等)和任务栏位置如何,都要求它执行此操作。有没有办法告诉它在托盘附近打开,而不是完全定位?

我希望它能完全按照Windows中的“网络”设置按钮执行操作。类似于以下内容:

Network System Tray Image

这在Java中是否可行?

2 个答案:

答案 0 :(得分:8)

正如Vulcan指出的那样,是的,这是可能的。

此外,我们可以考虑将弹出窗口放在哪里(与任务图标的位置相关)

Show me the popup

public class TestTrayIcon {

    protected static final PopupFrame POPUP_FRAME = new PopupFrame();

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {

                try {
                    TrayIcon trayIcon = new TrayIcon(ImageIO.read(new File("D:/DevWork/common/icons/iconex_v_bundle_png/iconexperience/v_collections_png/basic_foundation/16x16/plain/about.png")));
                    trayIcon.addMouseListener(new MouseAdapter() {
                        @Override
                        public void mouseClicked(MouseEvent e) {

                            Point pos = e.getLocationOnScreen();
                            Rectangle screen = getScreenBoundsAt(pos);

                            if (pos.x + POPUP_FRAME.getWidth() > screen.x + screen.width) {
                                pos.x = screen.x + screen.width - POPUP_FRAME.getWidth();
                            }
                            if (pos.x < screen.x) {
                                pos.x = screen.x;
                            }

                            if (pos.y + POPUP_FRAME.getHeight() > screen.y + screen.height) {
                                pos.y = screen.y + screen.height - POPUP_FRAME.getHeight();
                            }
                            if (pos.y < screen.y) {
                                pos.y = screen.y;
                            }

                            POPUP_FRAME.setLocation(pos);
                            POPUP_FRAME.setVisible(true);

                        }
                    });
                    SystemTray.getSystemTray().add(trayIcon);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    }

    public static class PopupFrame extends JFrame {

        public PopupFrame() throws HeadlessException {
            setLayout(new BorderLayout());
            add(new JLabel("Hello world"));
            pack();
        }
    }

    public static Rectangle getScreenBoundsAt(Point pos) {
        GraphicsDevice gd = getGraphicsDeviceAt(pos);
        Rectangle bounds = null;

        if (gd != null) {
            bounds = gd.getDefaultConfiguration().getBounds();
            Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(gd.getDefaultConfiguration());

            bounds.x += insets.left;
            bounds.y += insets.top;
            bounds.width -= (insets.left + insets.right);
            bounds.height -= (insets.top + insets.bottom);
        }
        return bounds;
    }

    public static GraphicsDevice getGraphicsDeviceAt(Point pos) {
        GraphicsDevice device = null;

        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice lstGDs[] = ge.getScreenDevices();

        ArrayList<GraphicsDevice> lstDevices = new ArrayList<GraphicsDevice>(lstGDs.length);

        for (GraphicsDevice gd : lstGDs) {
            GraphicsConfiguration gc = gd.getDefaultConfiguration();
            Rectangle screenBounds = gc.getBounds();

            if (screenBounds.contains(pos)) {
                lstDevices.add(gd);
            }
        }

        if (lstDevices.size() == 1) {
            device = lstDevices.get(0);
        }
        return device;
    }
}

答案 1 :(得分:4)

是的,这是可能的。

要设置窗口相对于屏幕右下角的位置,您可以获得图形环境的最大窗口边界,然后执行简单的数学运算。

Rectangle screen = GraphicsEnvironment.getLocalGraphicsEnvironment()
        .getMaximumWindowBounds();
String os = System.getProperty("os.name");
if (os.contains("Windows")) {
    setLocation(screen.width - windowSize.width - 6, screen.height - windowSize.height - 6);
} else if (os.contains("Mac")) {
    setLocation(screen.width - windowSize.width + 6, 6);
}

宽度和高度上的- 6是窗口和任务栏之间的小差距,并且可以轻松自定义。

但是,使用此方法时,请注意位于顶部或左侧的Windows任务栏在窗口的右侧/底部仍将具有任务栏大小的间隙。我不相信可以单独从Java API中找到任务栏方向。