Java SWT显示StyledText的行号 [英] Java SWT show Line numbers for StyledText

问题描述

我想知道是否有一种简单的方法来显示带有StyledText文本字段的行号-即使行被换行了.我在应用程序中使用它，如果内容变大，则一些行号会很好.

I was wondering if there is a straightforward way to display line numbers with StyledText text field - even if lines are wrapped. I'm using it in my application and if content gets to big, some line numbers would be nice.

谢谢.

推荐答案

密钥是 org.eclipse.swt.custom.Bullet .基本上，它是一个符号(或者在我们的例子中是一个数字)，您可以将其添加到一行的开头.

The key is org.eclipse.swt.custom.Bullet. It's basically a symbol (or in our case a number) you can add to the beginning of a line.

//text is your StyledText
text.addLineStyleListener(new LineStyleListener()
{
    public void lineGetStyle(LineStyleEvent e)
    {
        //Set the line number
        e.bulletIndex = text.getLineAtOffset(e.lineOffset);

        //Set the style, 12 pixles wide for each digit
        StyleRange style = new StyleRange();
        style.metrics = new GlyphMetrics(0, 0, Integer.toString(text.getLineCount()+1).length()*12);

        //Create and set the bullet
        e.bullet = new Bullet(ST.BULLET_NUMBER,style);
    }
});

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