问题描述
我遇到了一个问题:我想在JEditorPane中使用内部锚点<a name="x">和链接<a href="#x">.
I've got a problem: I want to use internal anchors <a name="x"> and links <a href="#x"> inside a JEditorPane.
窗格的内容不是从资源中加载的，而是动态创建的并且可以作为字符串使用.
The content of the pane is not loaded from a resource but dynamically created and available as a String.
如何使JEditorPane滚动到正确的位置? (在示例中，它应该滚动到顶部)侦听器仅捕获null，这增加了问题.
How can I get my JEditorPane to scroll to the proper location? (in the example it should scroll to the top)The listener only catches null, which adds to the problem.
这是我的SSCCCE:
Here's my SSCCCE:
public static void main(final String[] args) {
final JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
f.setTitle("JEditorPane Test");
final String text = "<html><body><a name='link1'>test</a>some text<br /><br /><br /><br /><br /><br /><br /><br /><br /><br />some more text<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />some more text<a href='#link1'>jump to top</a></body></html>";
final JEditorPane ep = new JEditorPane();
ep.setContentType("text/html");
ep.setText(text);
ep.setEditable(false);
ep.addHyperlinkListener(new HyperlinkListener() {
@Override public void hyperlinkUpdate(final HyperlinkEvent pE) {
if (HyperlinkEvent.EventType.ACTIVATED == pE.getEventType())
System.out.println("ep link click: " + pE.getURL());
}
});
final JScrollPane sp = new JScrollPane(ep);
f.add(sp);
f.setBounds(200, 200, 400, 400);
f.setVisible(true);
}
推荐答案
好吧，我终于解决了这个问题.
Okay I finally got this solved.
我一直在使用scrollToReference()进行测试，但是以某种方式无法正常工作.然后，我玩了HTML解析，锚点和插入符以及setCaretPosition()，它们有时仅起作用.然后出于纯粹的巧合，我再次在代码中包含了scrollToReference()，滚动突然起作用了……而且仍然可以完美地工作！
I had been testing around with scrollToReference(), but it somehow didn't work.Then I played with HTML parsing and anchors and carets and setCaretPosition() which worked only sometimes.Then out of pure coincidence I had included scrollToReference() again in my code and scrolling suddenly worked... and still works flawlessly!
这是工作代码:
public static void main(final String[] args) {
final JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
f.setTitle("JEditorPane Test");
final String text = "<html><body><a name='link1'>test</a>some text<br /><a href='#thisisbottom'>down</a><br /><br /><br /><br /><br /><br /><br /><br /><br /><a name='mid1'></a>some more text<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />some more text [<a href='#link1'>jump to top</a>] <br /> or jump to <a name='thisisbottom' href='#mid1'>center</a></body></html>";
final JEditorPane ep = new JEditorPane();
ep.setContentType("text/html");
ep.setText(text);
ep.setEditable(false);
ep.addHyperlinkListener(new HyperlinkListener() {
@Override public void hyperlinkUpdate(final HyperlinkEvent pE) {
if (HyperlinkEvent.EventType.ACTIVATED == pE.getEventType()) {
System.out.println("JEditorPane link click: url='" + pE.getURL() + "' description='" + pE.getDescription() + "'");
String reference = pE.getDescription();
if (reference != null && reference.startsWith("#")) { // link must start with # to be internal reference
reference = reference.substring(1);
ep.scrollToReference(reference);
}
}
}
});
final JScrollPane sp = new JScrollPane(ep);
f.add(sp);
f.setBounds(200, 200, 400, 400);
f.setVisible(true);
}
这篇关于跳到JEditorPane中的内部锚点的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！