package com.j2medev.chapter3;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class Concurrency extends MIDlet implements CommandListener{
    
    private Display display = null;
    private WatchCanvas canvas = null;
    
    public void startApp() {
        if(display == null){
            display = Display.getDisplay(this);
            canvas = new WatchCanvas(display,60);
            canvas.addCommand(new Command("Exit",Command.EXIT,1));
            canvas.setCommandListener(this);
        }
        display.setCurrent(canvas);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command command, Displayable displayable) {
        if(command.getCommandType() == Command.EXIT){
            destroyApp(false);
            notifyDestroyed();
        }
    }
}