menuscreen.java

运行于j2me上的泡泡龙游戏。[工程环境:jBuilder jdk:wtk2.2]

package com.whkjava.popo;

/**
 * <p>Title: KMPoPo</p>
 * <p>Description: KMPoPo</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author HUAKUI_WANG
 * @version 1.0
 */
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;

class MenuScreen extends List
    implements CommandListener
{
   private final KMPoPoMIDlet m_MIDlet;
   private final Command ok = new Command("Select", 4, 1);
   private final Command back = new Command("Return", 3, 1);

    public MenuScreen(KMPoPoMIDlet midlet)
    {
       super("KMPoPo", 3);
        m_MIDlet = midlet;
        append("Help", null);
        append("About", null);
        append("Exit", null);
        addCommand(ok);
        addCommand(back);
        setCommandListener(this);
    }

    private Alert aboutGame()
    {
        Alert alert = new Alert("About KM PoPo");
        alert.setString("KMPoPo 1.0 Version\n\nKM Product\n\nMaker:KingMark");
        alert.setTimeout(-2);
       return alert;
    }

    private Alert helpGame()
    {
        Alert alert = new Alert("KMPoPo Help");
        alert.setString("4 Key and 6 Key for move.\n5 Key Shout");
        alert.setTimeout(-2);
       return alert;
    }

    public void commandAction(Command command, Displayable displayable)
    {
        int nSelect = getSelectedIndex();
        if(command == ok)
        {
          if(nSelect == 0)
             Display.getDisplay(m_MIDlet).setCurrent(helpGame());
          else
          if (nSelect == 1)
             Display.getDisplay(m_MIDlet).setCurrent(aboutGame());
         else
         if (nSelect == 2)
             m_MIDlet.notifyDestroyed();
        } else
        if(command == back){
            Display.getDisplay(m_MIDlet).setCurrent(new TitleCanvas(m_MIDlet));
        }
    }
}