Swing GUI在JTextPane中附加彩色文本

jensiepoo 发表于 Dev

詹西普

public static void setJTextPaneFont(JTextPane jtp, Color c, int from, int to) {
    // Start with the current input attributes for the JTextPane. This
    // should ensure that we do not wipe out any existing attributes
    // (such as alignment or other paragraph attributes) currently
    // set on the text area.
    MutableAttributeSet attrs = jtp.getInputAttributes();

    // Set the font color
    StyleConstants.setForeground(attrs, c);

    // Retrieve the pane's document object
    StyledDocument doc = jtp.getStyledDocument();

    // Replace the style for the entire document. We exceed the length
    // of the document by 1 so that text entered at the end of the
    // document uses the attributes.
    doc.setCharacterAttributes(from, to, attrs, false);
}

上面这段代码的目的是在from和to之间的两个索引之间更改特定代码行的颜色。调用此函数后，中的文本和颜色JTextPane会正确更新（特定行）。

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但是，当我尝试JTextPane用新文本刷新（通过清空jtextpane和重新添加新文本）时，所有文本都会自动绘制为用调用时最后分配的颜色setJTextPaneFont。

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基本上，整个文档（新文档）将变成彩色的，而不必调用上面的函数，而不仅仅是带有几条彩色的线。因此，我怀疑JTextPane某种程度上的属性已被修改。

所以问题是，我如何能够将其重置JTextPane为默认属性？

纳韦耶尔

试试这个

public void setJTextPaneFont(JTextPane jtp, Color c, int from, int to) {
            // Start with the current input attributes for the JTextPane. This
            // should ensure that we do not wipe out any existing attributes
            // (such as alignment or other paragraph attributes) currently
            // set on the text area.

            StyleContext sc = StyleContext.getDefaultStyleContext();

          // MutableAttributeSet attrs = jtp.getInputAttributes();

            AttributeSet attrs = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, c);
            // Set the font color
            //StyleConstants.setForeground(attrs, c);

            // Retrieve the pane's document object
            StyledDocument doc = jtp.getStyledDocument();
            // System.out.println(doc.getLength());

            // Replace the style for the entire document. We exceed the length
            // of the document by 1 so that text entered at the end of the
            // document uses the attributes.
            doc.setCharacterAttributes(from, to, attrs, true);
        }