在Swing的JTextPane中设置标签策略 [英] Setting the tab policy in Swing's JTextPane
本文介绍了在Swing的JTextPane中设置标签策略的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我希望我的JTextPane每次按Tab时都插入空格.当前,它会插入制表符(ASCII 9).
I want my JTextPane to insert spaces whenever I press Tab. Currently it inserts the tab character (ASCII 9).
反正有没有自定义JTextPane的选项卡策略(除了捕获"tab-key"事件并插入自己看来是空格的东西)?
Is there anyway to customize the tab policy of JTextPane (other than catching "tab-key" events and inserting the spaces myself seems an)?
推荐答案
您可以在JTextPane上设置javax.swing.text.Document.以下示例将使您了解我的意思:)
You can set a javax.swing.text.Document on your JTextPane. The following example will give you an idea of what I mean :)
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
public class Tester {
public static void main(String[] args) {
JTextPane textpane = new JTextPane();
textpane.setDocument(new TabDocument());
JFrame frame = new JFrame();
frame.getContentPane().add(textpane);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(new Dimension(200, 200));
frame.setVisible(true);
}
static class TabDocument extends DefaultStyledDocument {
@Override
public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
str = str.replaceAll("\t", " ");
super.insertString(offs, str, a);
}
}
}
定义一个DefaultStyleDocument来完成这项工作.然后将文档设置为您的JTextPane.
Define a DefaultStyleDocument to do the work. Then set the Document to your JTextPane.
欢呼 凯
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