如何在JEditorPane中设置标签大小？ [英] How do you set the tab size in a JEditorPane?

问题描述

JTextArea 的标签大小可以使用 setTabSize（int）轻松设置。

A JTextArea's tab size can easily be set using setTabSize(int).

是否有类似的方法使用 JEditorPane ？

Is there a similar way to do it with a JEditorPane?

现在，我的窗格中带有标签的文字如下所示：

Right now, text with tabs in my pane looks like:

if (stuff){
            more stuff;
}

而且，我更喜欢一个小得多的制表位：

And, I'd prefer a much smaller tab stop:

if (stuff){
    more stuff;
}

推荐答案

由于JEditorPane旨在支持不同种类的内容类型，它没有提供直接指定选项卡大小的方法，因为它的含义应该由内容模型定义。
但是当你使用一个PlainDocument模型或它的一个后代时，有一个tabSizeAttribute可以提供你想要的东西。

As JEditorPane is designed to support different kinds of content types, it does not provide a way to specify a "tab size" directly, because the meaning of that should be defined by the content model. However when you use a model that's a PlainDocument or one of its descendants, there is a "tabSizeAttribute" that provides what you are looking for.

示例：

JEditorPane pane = new JEditorPane(...);
...
Document doc = pane.getDocument();
if (doc instanceof PlainDocument) {
    doc.putProperty(PlainDocument.tabSizeAttribute, 8);
}
...

来自Javadoc：

/**
 * Name of the attribute that specifies the tab
 * size for tabs contained in the content.  The
 * type for the value is Integer.
 */
public static final String tabSizeAttribute = "tabSize";

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