menuscreen.java

Java自己做的小游戏

import javax.microedition.lcdui.*;
public class menuScreen
{
	int selectY=0;
	int selectX=0;
	static int menuNum=0;
	myCanvas mc;
	Image backImg=null;
	Image menuImg=null;
	public menuScreen(myCanvas mc) 
	{
		this.mc=mc;
		initRes();
	}
	public void initRes() 
	{
		try
		{
			backImg=Image.createImage("/back1.png");
			menuImg=Image.createImage("/menu.png");
		}
		catch(Exception e)
		{
			e.printStackTrace();
			System.out.println("menuScreen图片错误");
		}
	}
	public void paint(Graphics g) 
	{
		try
		{
			g.drawImage(backImg, (this.mc.getWidth()-this.backImg.getWidth())/2,(this.mc.getHeight()-this.backImg.getHeight())/2, 0);
			g.setClip((mc.getWidth()-menuImg.getWidth())/2, (this.mc.getHeight()-this.backImg.getHeight())/2+120, 53, 13);
			g.drawImage(menuImg,(mc.getWidth()-menuImg.getWidth())/2, (this.mc.getHeight()-this.backImg.getHeight())/2+120-menuNum*13, 0);
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
	public void processEvent(int key)
	{
		switch(key)
		{
		case myCanvas.KEY_NUM2:
			menuNum--;
			if(menuNum<0)
			{
				menuNum=5;
			}
			break;
		case myCanvas.KEY_NUM8:
			menuNum++;
			if(menuNum>5)
			{
				menuNum=0;
			}
			break;
			default:
				key=mc.getGameAction(key);
				switch(key)
				{
				case myCanvas.UP:
					menuNum--;
					if(menuNum<0)
					{
						menuNum=5;
					}
					break;
				case myCanvas.DOWN:
					menuNum++;
					if(menuNum>5)
					{
						menuNum=0;
					}
					break;
				}
		}
	}
	public void processEvent() 
	{
		switch(menuNum)
		{
		case 0:
			if(myCanvas.state==1)
			{
				myCanvas.state=5;
			}
			break;
		case 1:
			myCanvas.state=3;
			break;
		case 2:
			myCanvas.state=2;
			break;
		case 3:
			break;
		case 4:
			break;
		case 5:
			myCanvas.bRun=false;
			break;
		case 6:
			break;
		}
	}
	public void recycleRes()
	{
		mc=null;
		backImg=null;
		menuImg=null;
	}
}