如何使用超链接创建一个复选框
Mon*_*ffy 5 java checkbox swing jtextpane hyperlink
题 :
我尝试在Java中创建一个包含超链接的复选框.
但是,我无法使链接可点击,只能链接,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();
}
}
将frame1展示一个简单的复选框,整个文本是可点击选中/取消复选框.这就是我用frame2复选框和JLabel组成的原因.它工作得很好,但它是可点击的所有文本.
有没有办法让链接可点击？
谢谢
路飞
[编辑]回复:
感谢@camickr给我一个回应.
这里的解决方案,最后不是那么容易做到的:
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());
}
}
}
一些解释要理解:
- 我使用的JTextPane到位JEditorPane中,因为文字没有在文本编辑器包,我可以用我的HTML标签做到这一点.
- 我修改了提供的文本以添加粗体和下划线标记
<b><u>,并且我还将颜色更改为超链接以作为普通链接.在其他情况下,您将获得链接,但它将具有相同的文本颜色. - 注意
HyperlinkListener每次鼠标悬停在链接上时生成一个事件,这就是为什么我用HyperlinkEvent.EventType.ACTIVATED相应的"点击" 过滤了事件的原因 - Chang的字体大小/样式/颜色到整个文本它真的很棘手,你需要使用我的技术,
setFont这里的方法不起作用
请享用 :)
[EDIT2]要知道的事情:
在您使用的情况下
Nimbus Look&Feel:
Run Code Online (Sandbox Code Playgroud)try { for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (Exception e) { e.printStackTrace(); }
有一个错误,你将有一个白色背景.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);
对于JEditorPane也是如此,但更改了该行
defaults.put("EditorPane[Enabled].backgroundPainter", bgColor);
我知道如何在基本JDK中点击超链接的唯一方法是使用JEditorPane.
所以你可以创建一个JPanel包含两个组件:
- a
JCheckBox(没有文字) - a
JEditorPane带有你的超链接
您可以轻松地将其自定义JEditorPane为透明且没有,Border因此看起来这两个组件是单个组件.
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