import java.awt.*;
import java.applet.Applet;
import java.util.*;
import java.net.*;

public class Cross extends Applet implements Runnable{
	Thread th;
	Vector mvs;
	Updater udr;
	Bak bak;

	Checkbox stop;

	public void init(){
		add(stop = new Checkbox("stop"));
		kon();
		th = new Thread(this);
		th.start();
	}
	public boolean action(Event e, Object o){
		boolean res = super.action(e, o);
		if(e.target == stop){
			if(th==null) return res;
			if(stop.getState()){
				th.suspend();
			}else{
				th.resume();
			}
		}
		return res;
	}
	public void kon(){
		udr = new Updater(this);
		EzImg ezImg = new EzImg(this);
		mvs = new Vector();

		bak = new Bak(this);
		udr.add(bak, 0);

		Dimension sz = new Dimension(16,16);
		Image img = ezImg.maru(sz,Color.blue);
		img = ezImg.alphaImg(img);
		MovImg mv = new MovImg(size(), img);
		udr.add(mv, 10);
		mvs.addElement(mv);

		img = ezImg.maru(new Dimension(32,32), Color.yellow);
		img = ezImg.alphaImg(img);
		mv = new MovImg(size(), img);
		udr.add(mv, 20);
		mvs.addElement(mv);

		img = ezImg.getImage("gif/hitsuji.gif");
		if(img == null){
			showStatus("Filed getImage");
		}else{
			mv = new MovImg(size(), img);
			udr.add(mv, 25);
			mvs.addElement(mv);
		}

		sz = new Dimension(32,32);
		img = ezImg.btn(sz,Color.red);
		img = ezImg.alphaImg(img);
		mv = new MovImg(size(), img);
		udr.add(mv, 30);
		mvs.addElement(mv);

		sz = new Dimension(64,64);
		img = ezImg.maru(sz,Color.magenta);
		img = ezImg.alphaImg(img, 128);
		mv = new MovImg(size(), img);
		udr.add(mv, 100);
		mvs.addElement(mv);
	}
	public void run(){
		while(th.isAlive()){
			try{
			  th.sleep(100);
			}catch(InterruptedException e){}	
			work();
		}
	}
	void work(){
		Enumeration e = mvs.elements();
		bak.cntup(udr);
		while(e.hasMoreElements()){
			MovImg mv = (MovImg)e.nextElement();
			mv.move(udr);
		}
		repaint();
	}
	public void update(Graphics g){
		udr.update(g);
	}
}

class Bak implements Drawer{
	Dimension sz;
	Image img;
	int cnt, cntN;
	EzImg ezImg;

	public Bak(Applet ap){
		sz = ap.size();
		ezImg = new EzImg(ap);
		cntN = 50;
		cnt = cntN;
		img = null;
	}
	public void cntup(Updater udr){
		if(++cnt>=cntN){
			img = ezImg.maru(sz, Rnd.color());
			udr.set(new Rectangle(sz));
			cnt = 0;
		}
	}

	boolean done;
	public void draw(Graphics g, Rectangle r){
		if(done) return;
		if(img==null) return;
		g.drawImage(img, 0, 0, null);
		done = true;
	}
	public void begin(){
		done = false;
	}
	public void end(){}	
}

// EOF