package TestDemo04;


import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.Sprite;

public class SpriteDemo01 extends GameCanvas implements Runnable{
	private Graphics g;
	private Image image;
	private int width,height;
	private Sprite s1;
	private Sprite s2;
	private int x1=0;
	private int y1=0;
	
	
	

	protected SpriteDemo01() {
		super(true);
		
		
		try{
			image=Image.createImage("/tu03.PNG");
			
		}
		catch(Exception e){
			e.printStackTrace();
			
		}
		g=this.getGraphics();
		g.setColor(0,0,0);
		width=this.getWidth();
		height=this.getHeight();
		s1=new Sprite(image,147,112);
		s2=new Sprite(image,147,112);
		s1.setPosition(x1, y1);
		s2.setPosition(width/2, height/2);
		s1.paint(g);
		s2.paint(g);
		s1.defineCollisionRectangle(5, 25, 120, 62);//設置碰撞區域,5,25是以圖片左上角為原點來設置的碰撞區域,120與62指設置碰撞區域的寬,高
		s2.defineCollisionRectangle(5, 25, 120, 62);
		this.flushGraphics();
		Thread t=new Thread(this);
		t.start();
	}
	public void run(){
		long start=0;
		long end=0;
		while(true){
			start=System.currentTimeMillis();
			this.keyInfo();
			this.draw();
			end=System.currentTimeMillis();
			if((end-start)<500){
				try{
					Thread.sleep(500-(end-start));
					
				}
				catch(Exception e ){}
			}
		}
		
	}
	public void keyInfo(){
		int keystate=getKeyStates();
		if ((keystate & UP_PRESSED) != 0) {
			y1 -= 10;
		}
		if ((keystate & DOWN_PRESSED) != 0) {
			y1+=10;

		}
		if ((keystate & LEFT_PRESSED) != 0) {
			x1-=10;
		}
		if ((keystate & RIGHT_PRESSED) != 0) {
			x1+=10;

		}
		
	}
	public void draw(){
		if(x1<0){
			width=0;
		}
		if(x1+147>width){
			x1=width-147;
		}
		if(y1<0){
			y1=0;
		}
		if(y1+112>height){
			y1=height-112;
			
			
		}
		g.fillRect(0, 0, width, height);
		s1.setPosition(x1, y1);
		s1.paint(g);
		s2.paint(g);
		this.flushGraphics();
		if(s1.collidesWith(s2, false)){
			s2.setVisible(false);//這句的作用是,當s1碰撞到s2時,s2消失
		}
	}
	public void start() {
		
		
	}

}