右键单击 JTabbedPane 上的 JPopupMenu

Question

我有一个带有自定义选项卡组件的 JTabbedPane。我希望能够右键单击选项卡上的任意位置并显示 JPopupMenu。我遇到的问题是每个选项卡上都有死 space，右键单击不会出现 JPopupMenu。 I believe it is because I'm attaching the listener to a JPanel that is acting as the Tab Component, but the JPanel isn't "filling" the whole tab.

有没有办法将鼠标侦听器附加到整个选项卡？

这里有一个例子来说明我所看到的。在标签的黄色区域，我可以右键弹出菜单，但是在标签的灰色区域，右键没有被拦截。

public class TabExample {

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.setBounds(100, 100, 1024, 768);

                JTabbedPane pane = new JTabbedPane();

                for (int i = 0; i < 15; i++) {
                    JPanel panel = new JPanel();
                    JLabel label = new JLabel("Panel " + i);
                    panel.add(label);
                    pane.addTab("", panel);

                    final JPanel tabComponentPanel = new JPanel(new BorderLayout());

                    final JLabel tabComponentLabel = new JLabel("My Tab " + i);

                    final JLabel tabComponentImageLabel = new JLabel();
                    ImageIcon icon = new ImageIcon(getImage());
                    tabComponentImageLabel.setHorizontalAlignment(JLabel.CENTER);
                    tabComponentImageLabel.setIcon(icon);

                    tabComponentPanel.add(tabComponentImageLabel,BorderLayout.CENTER);
                    tabComponentPanel.add(tabComponentLabel,BorderLayout.SOUTH);

                    tabComponentPanel.setBackground(Color.YELLOW);

                    tabComponentPanel.addMouseListener(new MouseAdapter() {

                        @Override
                        public void mouseClicked(MouseEvent e) {

                            if (e.getButton() == MouseEvent.BUTTON1) {
                                pane.setSelectedComponent(panel);
                            } else if (e.getButton() == MouseEvent.BUTTON3) {
                                JPopupMenu jPopupMenu = new JPopupMenu();
                                JMenuItem menuItem = new JMenuItem("Menu Item");
                                jPopupMenu.add(menuItem);
                                menuItem.addActionListener(new ActionListener() {

                                    @Override
                                    public void actionPerformed(ActionEvent e) {
                                        System.out.println("Clicked ");

                                    }
                                });

                                jPopupMenu.show(tabComponentPanel, e.getX(),
                                        e.getY());
                            }
                        }

                    });

                    pane.setTabComponentAt(pane.indexOfComponent(panel),
                            tabComponentPanel);
                }

                frame.add(pane);

                frame.setVisible(true);

            }

        });
    }

    private static BufferedImage getImage() {
        BufferedImage bimage = new BufferedImage(16, 16,
                BufferedImage.TYPE_BYTE_INDEXED);

        Graphics2D g2d = bimage.createGraphics();

        g2d.setColor(Color.red);
        g2d.fill(new Ellipse2D.Float(0, 0, 16, 16));
        g2d.dispose();

        return bimage;
    }
}

Answer 1

Is there a way to attach a mouse listener to the whole tab?

您可以将 MouseListener 添加到 JTabbedPane。

然后在 MouseEvent 上，您可以使用 getUI() 方法来获取 BasicTabbedPaneUI class。这个 class 有一个 getTabBounds(...) 方法。

因此您可以遍历所有选项卡以查看任何选项卡的边界是否与鼠标点匹配。

编辑：

BasicTabbedPaneUI 有一个 tabForCoordinate(...) 方法，它消除了对迭代逻辑的需要。

右键单击 JTabbedPane 上的 JPopupMenu

Right click JPopupMenu on JTabbedPane

java

swing

jtabbedpane