如何制作带有超链接的复选框

How to make a checkbox with an hyperlink

问题:

我尝试在 Java 中创建一个复选框,在文本中包含一个超 link。

但是,我无法使 link 可点击,只有 link,而不是整个文本。

这是我的示例代码:

public class TestClickLinkInCheckBox implements MouseListener {

    private JFrame frame1;
    private JFrame frame2;
    private String linkedText = "I have checked the data set I have selected, and agree to sign it following <a href=\"http://www.google.com\">the conditions of use of the service, defined in the policies of signature and certification</a> that I attest having read.";
    private JLabel label;

    public TestClickLinkInCheckBox() {
        justCheckBox();
        checkBoxWithLabel();
    }

    private void justCheckBox() throws HeadlessException {
        frame1 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));
        JCheckBox checkBox = new JCheckBox(prettyText(linkedText, 300, "left"));
        panel.add(checkBox);
        frame1.add(panel);
    }

    private void checkBoxWithLabel() {
        frame2 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        label = new JLabel(prettyText(linkedText, 300, "left"));
        label.addMouseListener(this);
        panel.add(label);

        frame2.add(panel);
    }

    private void display() {
        frame1.setVisible(true);
        frame1.pack();
        frame2.setVisible(true);
        frame2.pack();
    }

    public static String prettyText(String badText, int length, String textAlign) {
        return "<html><body width='" + String.valueOf(length) + "px'><div style=\"text-align: " + textAlign + ";\">"+ badText.replace("|||", "<br>") + "</html>";
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getSource() == label) {
            JOptionPane.showConfirmDialog(frame2, "Clicked");
        }
    }

    @Override
    public void mousePressed(MouseEvent e) {}
    @Override
    public void mouseReleased(MouseEvent e) {}
    @Override
    public void mouseEntered(MouseEvent e) {}
    @Override
    public void mouseExited(MouseEvent e) {}

    public static void main(String[] args) {
        TestClickLinkInCheckBox test = new TestClickLinkInCheckBox();
        test.display();
    }
}

frame1 显示一个简单的复选框,整个文本都是可点击的,check/uncheck 框。 这就是为什么我制作了frame2,由一个复选框和一个JLabel 组成。 它运行良好,但它是所有可单击的文本。

有什么方法可以只让 link 可点击吗?

谢谢

路飞


[编辑] 回复:

感谢@camickr 给我的回复。

这里是解决方案,最后不是那么容易做到:

public class TestClickLinkInCheckBox implements HyperlinkListener {

    private JFrame frame;
    private String linkedText = "I have checked the data set I have selected, and agree to sign it following <b><u><a href=\"http://www.google.com\" style=\"color: #0000ff\">the conditions of use of the service, defined in the policies of signature and certification</a></u></b> that I attest having read.";
    private JTextPane textPane;

    public static void main(String[] args) {
        TestClickLinkInCheckBox test = new TestClickLinkInCheckBox();
        test.display();
    }

    public TestClickLinkInCheckBox() {
        checkboxWithJEditorPanel();
    }

    private void checkboxWithJEditorPanel() {
        frame = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        textPane = new JTextPane();
        textPane.setContentType("text/html");
        textPane.setOpaque(false);
        textPane.setDocument(new HTMLDocument());
        textPane.setText(prettyText(linkedText, 300, "left"));
        textPane.setEditable(false);
        textPane.addHyperlinkListener(this);

         setFontSize(16);

        panel.add(textPane);

        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void setFontSize(int size) {
        MutableAttributeSet attrs = textPane.getInputAttributes();
         StyleConstants.setFontSize(attrs, size);
         StyledDocument document = textPane.getStyledDocument();
         document.setCharacterAttributes(0, document.getLength() + 1, attrs, false);
    }

    private void display() {
        frame.setVisible(true);
        frame.pack();
    }

    public static String prettyText(String badText, int length, String textAlign) {
        return "<html><body width='" + String.valueOf(length) + "px'><div style=\"text-align: " + textAlign + ";\">"+ badText.replace("|||", "<br>") + "</html>";
    }

    @Override
    public void hyperlinkUpdate(HyperlinkEvent e) {
        if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
            System.out.println(e.getURL());
        }
    }
}

一些理解的解释:

尽情享受吧:)


[EDIT2] 要知道的事情:

有一个错误,你将有一个白色的背景。所以你需要通过添加这段代码而不是 setBackground() 方法来修复它:

    Color bgColor = panel.getBackground();
    UIDefaults defaults = new UIDefaults();
    defaults.put("TextPane[Enabled].backgroundPainter", bgColor);
    textPane.putClientProperty("Nimbus.Overrides", defaults);
    textPane.putClientProperty("Nimbus.Overrides.InheritDefaults", true);
    textPane.setBackground(bgColor);

与 JEditorPane 相同,但更改行

    defaults.put("EditorPane[Enabled].backgroundPainter", bgColor);

我知道如何在基础 JDK 中使超链接可点击的唯一方法是使用 JEditorPane。

因此您可以创建一个包含两个组件的 JPanel

  1. a JCheckBox(无文字)
  2. a JEditorPane 与您的超链接

您可以轻松地将 JEditorPane 自定义为透明且没有 Border,这样看起来这两个组件是一个组件。

这不是一个非常动态或漂亮的解决方案,但您可以像这样使用多个标签:

private String beforeLinkText = "I have checked the data set I have selected, and agree to sign it following";
private String linkedText = " <a href=\"http://www.google.com\">the conditions of use of the service, defined in the policies of signature and certification</a> ";
private String afterLinkText = "that I attest having read.";

private void checkBoxWithLabel() {
        frame2 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        label = new JLabel(prettyText(linkedText, 400, "left"));
        label.addMouseListener(this);

        JPanel cbTextPanel = new JPanel (new FlowLayout(FlowLayout.LEFT));
        cbTextPanel.setPreferredSize(new Dimension(500,70));
        cbTextPanel.add(new JLabel(beforeLinkText));
        cbTextPanel.add(label);
        cbTextPanel.add(new JLabel(afterLinkText));
        panel.add(cbTextPanel);


        frame2.add(panel);
}