jpopupmenudemo.java

精通JBuilder2006 源代码 精通JBuilder2006 源代码

package chapter6.component;

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

public class JPopupMenuDemo extends JFrame {
    JTextField jTextField1 = new JTextField(10);
    JPopupMenu popup = new JPopupMenu();
    public JPopupMenuDemo() {
        Container contentPane = this.getContentPane();
        JPanel jPanel1 = new JPanel(new GridLayout(1, 2));
        JLabel jLabel1 = new JLabel("您选择的颜色：");
        jPanel1.add(jLabel1);
        jPanel1.add(jTextField1);
        ActionListener al = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                jTextField1.setText(((JMenuItem) e.getSource()).getText());
            }
        };
        JMenuItem jMenuItem1 = new JMenuItem("红色");
        jMenuItem1.addActionListener(al);
        popup.add(jMenuItem1);
        jMenuItem1 = new JMenuItem("黄色");
        jMenuItem1.addActionListener(al);
        popup.add(jMenuItem1);
        jMenuItem1 = new JMenuItem("紫色");
        jMenuItem1.addActionListener(al);
        popup.add(jMenuItem1);
        popup.addSeparator();
        jMenuItem1 = new JMenuItem("蓝色");
        jMenuItem1.addActionListener(al);
        popup.add(jMenuItem1);
        MYPopupListener pl = new MYPopupListener();
        addMouseListener(pl);
        jTextField1.addMouseListener(pl);
        contentPane.add(jPanel1);
        this.setTitle("JPopupMenuDemo");
        this.setSize(300, 200);
        this.setLocation(400, 400);
        this.setVisible(true);
    }

    class MYPopupListener extends MouseAdapter {
        public void mousePressed(MouseEvent e) {
            showPopup(e);
        }

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

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

    public static void main(String args[]) {
        JPopupMenuDemo test = new JPopupMenuDemo();
    }
}