调整具有固定宽度的长句的对话框消息（JOptionPane） [英] Resize dialog message (JOptionPane) for long sentence with fixed width

问题描述

我正在尝试使用超链接调整长句的对话框高度（ JOptionPane ）。

I'm trying to resize the height of the dialog box (JOptionPane) for long sentence with hyperlink.

我的代码是..

public class DialogTest {
public static void main(String[] args) throws Exception {
    JTextPane jtp = new JTextPane();
    Document doc = jtp.getDocument();
    for (int i = 0; i < 50; i++) {
        doc.insertString(doc.getLength(), " Hello Java World ", new SimpleAttributeSet());
        if ((3 == i) || (7 == i) || (15 == i)) {
            doc.insertString(doc.getLength(), " Hello Java World ", new SimpleAttributeSet());
            SimpleAttributeSet attrs = new SimpleAttributeSet();
            StyleConstants.setUnderline(attrs, true);
            StyleConstants.setForeground(attrs, Color.BLUE);
            String text = "www.google.com";
            URL url = new URL("http://" + text);
            attrs.addAttribute(HTML.Attribute.HREF, url.toString());
            doc.insertString(doc.getLength(), text, attrs);
        }
    }
    JScrollPane jsp = new JScrollPane(jtp);
    jsp.setPreferredSize(new Dimension(480, 150));
    jsp.setBorder(null);

    JOptionPane.showMessageDialog(null, jsp, "Title", JOptionPane.INFORMATION_MESSAGE);
}}

如果我没有设置首选大小，那么该对话框将是真的很长，而且它不可读。所以，我想将宽度修正为480。

If I don't set the preferred size, that dialog is gonna be really long, and it's not readable. So, I want to fix the width to 480.

而且，我想调整高度取决于文本的长度。

And, I want to adjust height depends on the length of the text.

如果我运行此代码，我会看到垂直滚动条。但我不想显示滚动条并调整对话框的高度。

If I run this code, I see the vertical scrollbar. But I don't want to show that scrollbar and adjust the height of the dialog.

推荐答案

修复宽度并调整高度，我个人使用这个技巧：
你使用setSize修复任意高度和目标宽度，然后使用getPreferredSize（）获得预期高度：

To fix the width and adapt the height, I personally use this trick : You fix an arbitrary height and the targeted width with setSize, and then get the expected height with getPreferredSize() :

jtp.setSize(new Dimension(480, 10));
jtp.setPreferredSize(new Dimension(480, jtp.getPreferredSize().height));

完整代码为：

public class DialogTest {
public static void main(String[] args) throws Exception {
    JTextPane jtp = new JTextPane();
    Document doc = jtp.getDocument();
    for (int i = 0; i < 50; i++) {
        doc.insertString(doc.getLength(), " Hello Java World ", new SimpleAttributeSet());
        if ((3 == i) || (7 == i) || (15 == i)) {
            doc.insertString(doc.getLength(), " Hello Java World ", new SimpleAttributeSet());
            SimpleAttributeSet attrs = new SimpleAttributeSet();
            StyleConstants.setUnderline(attrs, true);
            StyleConstants.setForeground(attrs, Color.BLUE);
            String text = "www.google.com";
            URL url = new URL("http://" + text);
            attrs.addAttribute(HTML.Attribute.HREF, url.toString());
            doc.insertString(doc.getLength(), text, attrs);
        }
    }
    //JScrollPane jsp = new JScrollPane(jtp);
    //jsp.setPreferredSize(new Dimension(480, 150));
    //jsp.setBorder(null);
    jtp.setSize(new Dimension(480, 10));
    jtp.setPreferredSize(new Dimension(480, jtp.getPreferredSize().height));

    //JOptionPane.showMessageDialog(null, jsp, "Title", JOptionPane.INFORMATION_MESSAGE);
    JOptionPane.showMessageDialog(null, jtp, "Title", JOptionPane.INFORMATION_MESSAGE);
}}

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