如何在JTextPane中的组件周围包装文本?

时间:2012-08-27 10:13:05

标签: java swing insert jtextpane jcomponent

我不了解JTextPane中的包装行为。如果我插入一个短文本,然后是一个JComponent然后再短文本我可以在一行中看到插入的东西,如果框架当然足够大。但是如果文本更长,那么它需要几行,组件总是放在一个新行中。

我已经认识到,在将组件插入JTextPane后,其文本会变长一个字符。因此,如果一个组件被JTextPane视为一个字符,为什么它的行为不像一个字符呢?可能它取决于java版本?我使用 Java(TM)SE运行时环境(版本1.7.0-b147)

下面是我的代码(使用shortText / longText实例化变量currentText以重现上述行为):

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.SimpleAttributeSet;

public class Test {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        JTextPane textPane = new JTextPane();
        textPane.setContentType("text/html");

        String shortText = "one two three four five six seven";
        String longText = "A text component that can be marked up with attributes that are represented graphically. You can find how-to information and examples of using text panes in Using Text Components, a section in The Java Tutorial. This component models paragraphs that are composed of runs of character level attributes. Each paragraph may have a logical style attached to it which contains the default attributes to use if not overridden by attributes set on the paragraph or character run. Components and images may be embedded in the flow of text.";
        String currentText = shortText;

        try {
            // insert text before the component
            textPane.getDocument().insertString(textPane.getDocument().getLength(), currentText,
                    new SimpleAttributeSet());

            textPane.setSelectionStart(textPane.getDocument().getLength());
            textPane.setSelectionEnd(textPane.getDocument().getLength());

            JComboBox component = new JComboBox();
            component.setMaximumSize(component.getPreferredSize());
            textPane.insertComponent(component);

            // insert text after the component
            textPane.getDocument().insertString(textPane.getDocument().getLength(), currentText,
                    new SimpleAttributeSet());

        } catch (BadLocationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        textPane.setEditable(false);

        frame.add(new JScrollPane(textPane));
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

1 个答案:

答案 0 :(得分:3)

由于您设置的内容类型,似乎会发生这种奇怪的行为。尝试删除此行:

textPane.setContentType ( "text/html" );

你会发现之后一切正常。我不确定它为什么会发生 - 可能是某些渲染错误或只是预期的行为。

P.S。我不认为在文本窗格中使用Swing组件(无论原因是什么)是一个不错的选择。但这只是我的意见......