talkwindow.java

移动Agent编程IBM开发的移动Agent编程工具Aglet 采用纯Java编写可移植性好这是用它写的一些例子用于初级入门

/*
 * @(#)TalkWindow.java
 *
 * 03L7246 (c) Copyright IBM Corp. 1996, 1998
 *
 * The program is provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * IBM will not be liable for any damages suffered by you as a result
 * of using the Program. In no event will IBM be liable for any
 * special, indirect or consequential damages or lost profits even if
 * IBM has been advised of the possibility of their occurrence. IBM
 * will not be liable for any third party claims against you.
 */

package examples.talk;

import java.awt.*;
import java.awt.event.*;
import com.ibm.aglet.util.*;

/**
 * @version     1.01    99/01/14
 * @author      Mitsuru Oshima
 * @author      Yoshiaki Mima
 */
public class TalkWindow extends Frame implements ActionListener {
    TextArea text   = new TextArea();
    TextField input = new TextField();
    AddressChooser dest = null;

    String address = "";
    TalkMaster master = null;
    TalkSlave slave = null;

    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();
        
        if (source == input) {
            String t = input.getText();
            appendText( t );
            if (master != null) {
                if (!address.equals(dest.getAddress())) {
                    master.dispatchSlave( address = dest.getAddress() );
                }
                master.sendText( t );
            } else if (slave != null) {
                slave.sendText( t );
            }
            input.setText("");
        }
    }

    public TalkWindow(TalkMaster master) {
        super("Talk");
        this.master = master;
        setLayout(new BorderLayout(5,5));
        dest = new AddressChooser();

        add("North", dest);
        add("Center", text);
        add("South", input);

        text.setEditable(false);
        input.addActionListener(this);

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                hide();
            }
        });
    }

    public TalkWindow(TalkSlave slave) {
        super("Talk");
        this.slave = slave;
        setLayout(new BorderLayout());

        add("Center", text);
        add("South", input);

        text.setEditable(false);
        input.addActionListener(this);
    }

    public void appendText(String str) {
        text.appendText( str + "\r\n");
    }
}