java swing AdjustPopupLocation.zip

// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@

package example;

import java.awt.*;
import javax.swing.*;

public final class MainPanel extends JPanel {
  private MainPanel（） {
    super（new BorderLayout（））;

    JCheckBox check = new JCheckBox（“Adjust JPopupMenu location“ true）;
    check.setFocusPainted（false）;

    JPopupMenu popup = new JPopupMenu（） {
      @Override public void show（Component c int x int y） {
        System.out.println（c.getClass（）.getName（））;
        if （check.isSelected（）） {
          Point p = new Point（x y）;
          Rectangle r = c.getBounds（）;
          Dimension d = getPreferredSize（）;
          if （p.x + d.width > r.width） {
            p.x -= d.width;
          }
          if （p.y + d.height > r.height） {
            p

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件       22539  2019-08-23 17:36  build.xml
     目录           0  2019-08-24 08:49  config\
     文件         448  2019-08-23 17:36  config\jnlp.xml
     文件        2145  2019-08-23 17:36  config\properties.xml
     文件         152  2019-08-23 17:36  config.gradle
     文件         526  2019-08-23 17:36  run.bat
     文件         614  2019-08-23 17:36  run.sh
     目录           0  2019-08-24 08:49  src\
     目录           0  2019-08-24 08:49  src\java\
     目录           0  2019-08-24 08:49  src\java\example\
     文件        2182  2019-08-23 17:36  src\java\example\MainPanel.java
     目录           0  2019-08-24 08:49  src\web\
     文件         537  2019-08-23 17:36  src\web\example.jnlp
     文件         341  2019-08-23 17:36  src\web\index.html
     文件        2297  2019-08-23 17:36  src\web\screenshot.png
     目录           0  2019-08-24 17:40  target\
     目录           0  2019-08-24 17:40  target\classes\
     目录           0  2019-08-24 17:40  target\classes\example\
     文件        1694  2019-08-24 17:40  target\classes\example\MainPanel$1.class
     文件         516  2019-08-24 17:40  target\classes\example\MainPanel$2.class
     文件        2910  2019-08-24 17:40  target\classes\example\MainPanel.class
     文件         660  2019-08-24 17:40  target\example.jnlp
     文件         545  2019-08-24 17:40  target\index.html
     文件        2297  2019-08-24 17:40  target\screenshot.png
     目录           0  2019-08-24 17:40  target\src\
     目录           0  2019-08-24 17:40  target\src\example\
     文件        2241  2019-08-24 17:40  target\src\example\MainPanel.java