menu.java

一个基于J2ME的pacman游戏

import javax.microedition.lcdui.*;

public class Menu extends List implements CommandListener {
	private pacman parent = null;

    	private GameCanvas canvas_;
	private int started = 0;

	private Display disp_;
	private Command exitGameCommand = new Command("EXIT", Command.EXIT, 1);
	private Command aboutCommand = new Command("Help", Command.EXIT, 1);
	private Command restartCommand = new Command("New Game", Command.SCREEN, 1); 
	private Command continueCommand = new Command("Continue", Command.SCREEN, 1); 
	//private Command overCommand = new Command("Game Over", Command.SCREEN, 1); 
	private Command exitCommand = new Command("Pause", Command.SCREEN, 1); 
 


	public Menu(Display d, pacman parent)
	{
		super("PACMAN", List.IMPLICIT);
		disp_ = d;
		init(parent);
	}
	
	public void init(pacman parent)
	{
		this.parent = parent;
		if (this.parent.gameOver == 0)
			this.append("Welcome to Pacman\n\nclick Menu to start", null);
		else if (this.parent.gameOver ==1 )
		{
			System.out.println("gameover");
			this.append("Game Over\n\nclick Menu to start", null);
		}

		this.addCommand(exitGameCommand);
		this.addCommand(aboutCommand);

		this.addCommand(restartCommand); 
		this.addCommand(continueCommand); 
		//this.addCommand(overCommand); 
		this.setCommandListener(this); 
        
	}
	

	
	public void show()
	{
		disp_.setCurrent(this);
	}
	
	public void commandAction (Command c, Displayable d) 
	{ 
		if (d == this) 
		{ 
			if (c == restartCommand || c == List.SELECT_COMMAND) 
			{ 
				//new game
				canvas_ = new GameCanvas(parent, disp_);
        			canvas_.addCommand(exitCommand);
        			canvas_.setCommandListener(this);
				started = 1;
				canvas_.show();
			} 
			if (c==exitGameCommand || c==List.SELECT_COMMAND)
			{
				//EXIT
				parent.notifyDestroyed();

			}
			if (c==continueCommand || c==List.SELECT_COMMAND)
			{
				//continue
				if (started == 1)
					canvas_.show();
			}

			
		}
		if (d == canvas_) //Pause, show menu
		{
			if (c==exitCommand || c == List.SELECT_COMMAND) 
			{	
				this.delete(0);
				this.parent.gameOver = 0;
				init(parent);
				canvas_.destroyFrameTrigger();
				this.show();

			}
		}
	} 

}