popup.java~5~

Contains a complete archiver by Haruhiko Okumura. The archiver uses an LZ engine whose output is c

package swingexample;

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

public class Popup extends JPanel {
  JPopupMenu popup = new JPopupMenu();
  JTextField t = new JTextField(10);
  public Popup() {
    add(t);
    ActionListener al = new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        t.setText(( (JMenuItem) e.getSource()).getText());
      }
    };
    JMenuItem m = new JMenuItem("红色");
    m.addActionListener(al);
    popup.add(m);
    m = new JMenuItem("黄色");
    m.addActionListener(al);
    popup.add(m);
    m = new JMenuItem("紫色");
    m.addActionListener(al);
    popup.add(m);
    popup.addSeparator();
    m = new JMenuItem("蓝色");
    m.addActionListener(al);
    popup.add(m);
    PopupListener pl = new PopupListener();
    addMouseListener(pl);
    t.addMouseListener(pl);
  }

  class PopupListener extends MouseAdapter {
    public void mousePressed(MouseEvent e) {
      maybeShowPopup(e);
    }

    public void mouseReleased(MouseEvent e) {
      maybeShowPopup(e);
    }

    private void maybeShowPopup(MouseEvent e) {
      if (e.isPopupTrigger()) {
        popup.show(e.getComponent(), e.getX(), e.getY());
      }
    }
  }

  public static void main(String args[]) {
    JFrame f = new JFrame();

    f.getContentPane().add(new Popup());
    f.show();
  }
}