Java Swing HTML呈现显示了非常大的要点

Java Swing HTML呈现显示了非常大的要点,java,html,swing,rendering,jeditorpane,Java,Html,Swing,Rendering,Jeditorpane,我在swing应用程序中使用JEditorPane呈现一些HTML。我使用了一个项目符号列表,..,并且在输出中获得了过大的项目符号。相同的HTML块将在真实浏览器中显示正常大小的项目符号 我在Windows7/JDK7和iirc上以及Ubuntu和OpenJDK1.7.0_09上观察到了这一点 这是已知的吗?有办法绕过它吗 工作示例: import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.Wi

我在swing应用程序中使用JEditorPane呈现一些HTML。我使用了一个项目符号列表,
  • ..
,并且在输出中获得了过大的项目符号。相同的HTML块将在真实浏览器中显示正常大小的项目符号

我在Windows7/JDK7和iirc上以及Ubuntu和OpenJDK1.7.0_09上观察到了这一点

这是已知的吗?有办法绕过它吗

工作示例:

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.WindowConstants;

/**
 *
 */
public class HTMLTest {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // create new frame
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        frame.setSize(500, 500);

        // create editor pane and fill with some html
        JEditorPane pane = new JEditorPane();
        pane.setContentType("text/html");
        pane.setEditable(false);
        pane.setText("<html><h1>Heading</h1>Text<ul><li>Bullet point</li></ul></html>");

        // add editor pane to frame and set frame visible
        frame.add(pane);
        frame.setVisible(true);
    }
}
在css文件和

<li>&bull; Item 1</li>
  • &bull;项目1

  • 在html中有一个像样的要点。受aterai启发的解决方案。

    请参阅ListView源代码

    public void paint(Graphics g, Shape allocation) {
        super.paint(g, allocation);
        Rectangle alloc = allocation.getBounds();
        Rectangle clip = g.getClipBounds();
        // Since listPainter paints in the insets we have to check for the
        // case where the child is not painted because the paint region is
        // to the left of the child. This assumes the ListPainter paints in
        // the left margin.
        if ((clip.x + clip.width) < (alloc.x + getLeftInset())) {
            Rectangle childRect = alloc;
            alloc = getInsideAllocation(allocation);
            int n = getViewCount();
            int endY = clip.y + clip.height;
            for (int i = 0; i < n; i++) {
            childRect.setBounds(alloc);
            childAllocation(i, childRect);
            if (childRect.y < endY) {
                if ((childRect.y + childRect.height) >= clip.y) {
                listPainter.paint(g, childRect.x, childRect.y,
                          childRect.width, childRect.height,
                          this, i);
                }
            }
            else {
                break;
            }
            }
        }
    }
    
    drawShape如下所示,您可以看到尺寸硬编码为8

    void drawShape(Graphics g, CSS.Value type, int ax, int ay, int aw, 
                   int ah, float align) {
                // Align to bottom of shape.
                int gap = isLeftToRight ? - (bulletgap + 8) : (aw + bulletgap);
                int x = ax + gap;
                int y = Math.max(ay, ay + (int)(align * ah) - 8);
    
            if (type == CSS.Value.SQUARE) {
            g.drawRect(x, y, 8, 8);
            } else if (type == CSS.Value.CIRCLE) {
            g.drawOval(x, y, 8, 8);
            } else {
            g.fillOval(x, y, 8, 8);
            }
        }
    
    您可以尝试用自己提供的方法替换样式表的ListPainter

    public ListPainter getListPainter(AttributeSet a) {
        return new ListPainter(a, this);
    }
    

    在这里,您可以更改项目符号的渲染,下面是另一个示例(使用css列表样式图像属性):

    bullet.png:

    import java.awt.*;
    import javax.swing.*;
    import javax.swing.text.*;
    import javax.swing.text.html.*;
    
    public class HTMLTest2 {
      public JComponent makeEditorPane(String bullet) {
        // create editor pane and fill with some html
        JEditorPane pane = new JEditorPane();
        pane.setContentType("text/html");
        pane.setEditable(false);
        if(bullet!=null) {
          HTMLEditorKit htmlEditorKit = (HTMLEditorKit)pane.getEditorKit();
          StyleSheet styleSheet = htmlEditorKit.getStyleSheet();
          //String u = getClass().getResource(bullet).toString();
          String u = "http://i.stack.imgur.com/jV29K.png";
          styleSheet.addRule(String.format("ul{list-style-image:url(%s);margin:0px 20px;", u));
          //styleSheet.addRule("ul{list-style-type:circle;margin:0px 20px;}");
          //styleSheet.addRule("ul{list-style-type:disc;margin:0px 20px;}");
          //styleSheet.addRule("ul{list-style-type:decimal;margin:0px 20px;}");
        }
        pane.setText("<html><h1>Heading</h1>Text<ul><li>Bullet point</li></ul></html>");
        return pane;
      }
      public JComponent makeUI() {
        JPanel p = new JPanel(new GridLayout(2,1));
        p.add(new JScrollPane(makeEditorPane(null)));
        p.add(new JScrollPane(makeEditorPane("bullet.png")));
        return p;
      }
      public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
          @Override public void run() {
            createAndShowGUI();
          }
        });
      }
      public static void createAndShowGUI() {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        f.getContentPane().add(new HTMLTest2().makeUI());
        f.setSize(320, 320);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
      }
    }
    
    import java.awt.*;
    导入javax.swing.*;
    导入javax.swing.text.*;
    导入javax.swing.text.html.*;
    公共类HTMLTest2{
    公共JComponent makeEditorPane(字符串项目符号){
    //创建编辑器窗格并填充一些html
    JEditorPane=新的JEditorPane();
    pane.setContentType(“text/html”);
    pane.setEditable(false);
    如果(项目符号!=null){
    HTMLEditorKit HTMLEditorKit=(HTMLEditorKit)窗格。getEditorKit();
    StyleSheet StyleSheet=htmlEditorKit.getStyleSheet();
    //字符串u=getClass().getResource(bullet.toString();
    字符串u=”http://i.stack.imgur.com/jV29K.png";
    addRule(String.format(“ul{list-style-image:url(%s);边距:0px 20px;”,u));
    //addRule(“ul{list样式类型:圆圈;边距:0px 20px;}”);
    //addRule(“ul{list样式类型:disc;边距:0px 20px;}”);
    //addRule(“ul{list样式类型:decimal;边距:0px 20px;}”);
    }
    窗格.setText(“HeadingText
    • 项目符号
      • ”; 返回窗格; } 公共JComponent makeUI(){ JPanel p=新JPanel(新网格布局(2,1)); p、 添加(新的JScrollPane(makeEditorPane(null)); p、 添加(新的JScrollPane(makeEditorPane(“bullet.png”)); 返回p; } 公共静态void main(字符串[]args){ invokeLater(新的Runnable(){ @重写公共无效运行(){ createAndShowGUI(); } }); } 公共静态void createAndShowGUI(){ JFrame f=新的JFrame(); f、 setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f、 getContentPane().add(新的HTMLTest2().makeUI()); f、 设置大小(320320); f、 setLocationRelativeTo(空); f、 setVisible(真); } }
    感谢您的出色搜索。这实际上让所有列表形状在swing的html呈现中都很难看。我认为在浏览器中,项目符号的大小可能取决于实际的字体大小。您可以覆盖ListView的“public void paint”(图形g,形状分配)“方法并在那里提供自己的绘画,而不是替换“ListPainter”,但为什么默认的答案如此难看?我将此答案标记为解决方案,因为它似乎比StanislavL的另一个答案更容易实现,尽管两者都很好。@aterai五年过去了,有没有更简单的解决方案,Oracle解决了这一问题。@Paul Taylor CSS在Swing组件中的支持自5年前以来一直没有改变。这与类似
    文本缩进:-20px;padding left:20px
    的功能相结合,可以将文本缩进到项目符号的右侧。不过,我还没有发现如何自动将缩进与项目符号大小对齐。
    public ListPainter getListPainter(AttributeSet a) {
        return new ListPainter(a, this);
    }
    
    import java.awt.*;
    import javax.swing.*;
    import javax.swing.text.*;
    import javax.swing.text.html.*;
    
    public class HTMLTest2 {
      public JComponent makeEditorPane(String bullet) {
        // create editor pane and fill with some html
        JEditorPane pane = new JEditorPane();
        pane.setContentType("text/html");
        pane.setEditable(false);
        if(bullet!=null) {
          HTMLEditorKit htmlEditorKit = (HTMLEditorKit)pane.getEditorKit();
          StyleSheet styleSheet = htmlEditorKit.getStyleSheet();
          //String u = getClass().getResource(bullet).toString();
          String u = "http://i.stack.imgur.com/jV29K.png";
          styleSheet.addRule(String.format("ul{list-style-image:url(%s);margin:0px 20px;", u));
          //styleSheet.addRule("ul{list-style-type:circle;margin:0px 20px;}");
          //styleSheet.addRule("ul{list-style-type:disc;margin:0px 20px;}");
          //styleSheet.addRule("ul{list-style-type:decimal;margin:0px 20px;}");
        }
        pane.setText("<html><h1>Heading</h1>Text<ul><li>Bullet point</li></ul></html>");
        return pane;
      }
      public JComponent makeUI() {
        JPanel p = new JPanel(new GridLayout(2,1));
        p.add(new JScrollPane(makeEditorPane(null)));
        p.add(new JScrollPane(makeEditorPane("bullet.png")));
        return p;
      }
      public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
          @Override public void run() {
            createAndShowGUI();
          }
        });
      }
      public static void createAndShowGUI() {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        f.getContentPane().add(new HTMLTest2().makeUI());
        f.setSize(320, 320);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
      }
    }