// Free Directionally Scrolling Image 1 by Hiroyuki Murata

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

public class ScrollImage1 extends Applet implements Runnable{

	Thread thread=null;
	MediaTracker tracker;
	boolean loaded;
	static final int Width=288,Height=192,StrSu=6;
	static final double Speed=5.0,Rot=0.003;
	double direction,fx,fy;
	int x,y;
	Image imagefile,ioff;
	Graphics goff;
	String loadMsg = "Now Loading";
	String fixMsg1 = "ScrollImage1";
	String fixMsg2 = "faichan@kt.rim.or.jp";
	Font loadFont = new Font("TimesRoman",Font.ITALIC,40);
	Font fixFont = new Font("TimesRoman",Font.BOLD,20);
	FontMetrics fixMetrics;
	int fixX1,fixY1,fixX2,fixY2;

	public void init(){
		resize(Width,Height);
		tracker = new MediaTracker(this);
		imagefile = getImage(getDocumentBase(), "images/a010-32.jpg");
		tracker.addImage(imagefile, 0);
		loaded = false;
		direction = (double)(Math.PI/4.0);
		fx = fy = 0.0;

		ioff = createImage(Width,Height*2);
		goff = ioff.getGraphics();
		goff.setColor(Color.white);
		goff.fillRect(0,0,Width,Height*2);

		goff.setFont(loadFont);
		goff.setColor(Color.blue);
		goff.drawString(loadMsg,10,Height*3/2);
		goff.setFont(fixFont);
		goff.setColor(Color.white);
		fixMetrics = getFontMetrics(fixFont);
		fixX1 = 10;
		fixY1 = Height + fixMetrics.getAscent() + 3;
		fixX2 = Width - fixMetrics.stringWidth(fixMsg2) - 10;
		fixY2 = Height * 2 - fixMetrics.getDescent() - 3;
	}

	public void start(){
		if(thread == null){
			thread = new Thread(this);
			thread.start();
		}
	}
	
	public void stop(){
		if(thread != null){
			thread.stop();
			thread = null;
		}
	}

	public void run(){
		if(!loaded){

			try {
				tracker.waitForAll();
			} catch (InterruptedException e) {
				return;
			}

			goff.drawImage(imagefile,0,0,this);

			loaded = true;
		}

		while(thread.isAlive()){
			try{
				thread.sleep(50);
			} catch(InterruptedException e){
				break;
			}
			repaint();
		}
	}

	//-----------------------------------------------------------
	public void update(Graphics g){
		goff.copyArea(0,0,	x,y,				Width-x,Height*2-y	);
		goff.copyArea(x,0,	Width-x,y,			-x,Height*2-y		);
		goff.copyArea(0,y,	x,Height-y,			Width-x,Height-y	);
		goff.copyArea(x,y,	Width-x,Height-y,	-x,Height-y			);
		goff.drawString(fixMsg1, fixX1,fixY1);
		goff.drawString(fixMsg2, fixX2,fixY2);

		paint(g);

		direction += Rot;
		if(direction>(double)(Math.PI*2))
			direction -= (double)(Math.PI*2);
		fx += Speed * Math.sin(direction);
		fy += Speed * Math.cos(direction);
		if(fx<0)			fx += Width;
		else if(fx>=Width)	fx -= Width;
		if(fy<0)			fy += Height;
		else if(fy>=Height)	fy -= Height;
		x = (int)fx;
		y = (int)fy;
	}

	public void paint(Graphics g){
		g.drawImage(ioff,0,-Height,this);
	}
}