在JScrollPane中的JEditorPane中包装HTML文本 [英] Wrapping HTML text in a JEditorPane inside a JScrollPane

问题描述

在一个应用程序中，我使用不可编辑的JEditorPanes作为一种通用的UI小部件，它可以显示一些复杂的内容（HTML可以做到这一点），包装文本行并捕获鼠标点击。不知道JEditorPane是否是一个很好的选择，所以请随时建议其他选择。

以下示例代码运行得很好：

  import java.awt.GridBagConstraints; 
 import java.awt.GridBagLayout; 
 
 import javax.swing.JEditorPane; 
 import javax.swing.JFrame; 
 import javax.swing.JPanel; 
 import javax.swing.JScrollPane; 
 import javax.swing.ScrollPaneConstants; 
 
 public class Main {
 
 private static JPanel createPanel（）{
 JPanel panel = new JPanel（）; 
 panel.setLayout（new GridBagLayout（））; 
 
 for（int i = 0; i <3; i ++）{
 JEditorPane editorPane = new JEditorPane（）; 
 editorPane.setEditable（false）; 
 editorPane.setContentType（text / html）; 
 
 String text = 
这是< b> item＃+ i +< / b> ;. + 
它上面有文字，应该被打包。 
; 
 
 editorPane.setText（text）; 
 
 GridBagConstraints约束= new GridBagConstraints（）; 
 constraints.gridx = 0; 
 constraints.gridy = i; 
 constraints.fill = GridBagConstraints.HORIZONTAL; 
 constraints.weightx = 1.0; 
 constraints.insets.bottom = 5; 
 
 panel.add（editorPane，constraints）; 
} 
 
返回面板; 
} 
 
 
 public static void main（String [] args）{
 JPanel panel = createPanel（）; 
 
 JFrame frame = new JFrame（）; 
 frame.setSize（200，200）; 
 frame.setLocation（200，200）; 
 
 //更改此以在示例之间切换
布尔useScrollPane = false; 
 
 if（useScrollPane）{
 JScrollPane scrollPane = new JScrollPane（）; 
 scrollPane.setHorizo​​ntalScrollBarPolicy（ScrollPaneConstants.HORIZONTAL_SCROLLBAR_​​NEVER）; 
 scrollPane.setViewportView（panel）; 
 frame.add（scrollPane）; 
} 
 else {
 frame.add（panel）; 
} 
 
 frame.setVisible（true）; 
} 
 
} 
  

并产生以下内容： p>

然而，我可能有大量的这些，并可以使用垂直滚动条。

所以我把整个东西放在一个JScrollPane中（改变 useScrollPane 变量到 true 在示例代码中查看此版本）。

如果我缩小窗口高度，这会给我一个垂直滚动条，但问题是现在文本不再被包裹： b
$ b

所以问题是：我如何获得文本包装和垂直滚动条？

正如你所看到的，我禁用了水平滚动条，但没有多大帮助。

PS。我对Swing没有太多的经验，所以如果你在这段代码中看到一些初学者的WTF，请指出：）

解决方案

  // JPanel panel = new JPanel（）; 
 ScrollablePanel面板=新的ScrollablePanel（）; 
 panel.setScrollableWidth（ScrollablePanel.ScrollableSizeHint.FIT）; 
  

请参阅 Scrollable Panel ，以及类的工作原理。

In an application, I'm using uneditable JEditorPanes as a sort of a generic UI widget that can display somewhat complex content (HTML will do the trick), wrap text lines and catch mouse clicks. Not sure if JEditorPane is a good choice for this, so feel free to suggest alternatives.

The following sample code works fairly well:

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;

public class Main {

  private static JPanel createPanel() {
    JPanel panel = new JPanel();
    panel.setLayout(new GridBagLayout());

    for (int i = 0; i < 3; i++) {
      JEditorPane editorPane = new JEditorPane();
      editorPane.setEditable(false);
      editorPane.setContentType("text/html");

      String text =
        "This is <b>item #" + i + "</b>." +
        " It's got text on it that should be wrapped."
      ;

      editorPane.setText(text);

      GridBagConstraints constraints = new GridBagConstraints();
      constraints.gridx = 0;
      constraints.gridy = i;
      constraints.fill = GridBagConstraints.HORIZONTAL;
      constraints.weightx = 1.0;
      constraints.insets.bottom = 5;

      panel.add(editorPane, constraints);
    }

    return panel;
  }


  public static void main(String[] args) {
    JPanel panel = createPanel();

    JFrame frame = new JFrame();
    frame.setSize(200, 200);
    frame.setLocation(200, 200);

    // Change this to switch between examples
    boolean useScrollPane = false;

    if (useScrollPane) {
      JScrollPane scrollPane = new JScrollPane();
      scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
      scrollPane.setViewportView(panel);
      frame.add(scrollPane);
    }
    else {
      frame.add(panel);
    }

    frame.setVisible(true);
  }

}

and produces the following:

However, I may have a large number of these and could use a vertical scrollbar.

So I put the whole thing in a JScrollPane (change the useScrollPane variable to true in the sample code to see this version).

This gives me a vertical scrollbar if I shrink the window height, but the problem is that now the text is no longer wrapped:

So the question is: how can I get both the text wrapping and the vertical scrollbar?

As you can see, I disabled the horizontal scrollbar, but it didn't help much.

PS. I don't have much experience with Swing, so if you see some beginner WTFs in this code, please point them out :)

解决方案

// JPanel panel = new JPanel();
ScrollablePanel panel = new ScrollablePanel();
panel.setScrollableWidth( ScrollablePanel.ScrollableSizeHint.FIT );

See Scrollable Panel for the class and an explanation on how the class works.

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