/** Use JWS to modify MyApplet15.java (previously Neko.java 
 ** on pp. 236-238 of the text) so that Neko has a more unusual 
 ** (weird?) behavior on a more interesting background image or
 ** color chosen by you. Note that since the Neko images aren't
 ** nicely cropped, they carry a white square with them. So, one
 ** possibility would be to create a maze with a colored background
 ** amd white paths. Also, edit MyApplet15.html in the project 
 ** directory, both to run the MyApplet15.class file you create,
 ** and so that everything looks nice and works properly.        **/

import java.awt.Graphics;
import java.awt.Image;
import java.awt.Color;

public class MyApplet15 extends java.applet.Applet
    implements Runnable {

    Image nekopics[] = new Image[9];
    Image currentimg;
    Thread runner;
    int xpos;
    int ypos = 50;

    public void init() {
        String nekosrc[] = { "sleep2.gif", "scratch1.gif",
            "stop.gif", "yawn.gif", "sleep1.gif",
            "awake.gif","yawn.gif", "sleep2.gif",
            "stop.gif" };

        for (int i=0; i < nekopics.length; i++) {
            nekopics[i] = getImage(getCodeBase(),
            "images/" + nekosrc[i]);
        }
    }

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

    public void run() {
        setBackground(Color.white);

        // run from one side of the screen to the middle
        nekorun(0, size().width / 2);

        // stop and pause
        currentimg = nekopics[2];
        repaint();
        pause(1000);

        // yawn
        currentimg = nekopics[3];
        repaint();
        pause(1000);

        // scratch four times
        nekoscratch(4);

        // sleep for 5 "turns"
        nekosleep(5);

        // wake up and run off
        currentimg = nekopics[8];
        repaint();
        pause(500);
        nekorun(xpos, size().width + 10);
    }

    void nekorun(int start, int end) {
        for (int i = start; i < end; i += 10) {
            xpos = i;
            // swap images
            if (currentimg == nekopics[0])
                currentimg = nekopics[1];
            else currentimg = nekopics[0];
                repaint();
            pause(150);
        }
    }


    void nekoscratch(int numtimes) {
        for (int i = numtimes; i > 0; i--) {
            currentimg = nekopics[4];
            repaint();
            pause(150);
            currentimg = nekopics[5];
            repaint();
            pause(150);
        }
    }

    void nekosleep(int numtimes) {
        for (int i = numtimes; i > 0; i--) {
            currentimg = nekopics[6];
            repaint();
            pause(250);
            currentimg = nekopics[7];
            repaint();
            pause(250);
        }
    }

    void pause(int time) {
        try { Thread.sleep(time); }
        catch (InterruptedException e) { }
    }

    public void paint(Graphics g) {
	 g.setColor(Color.cyan);
	 g.fillOval (20,30,500,50);
	 g.drawString ("Ahhh!  A nice comfy rug, but no time for a cat-nap!!", 5, 120);
	 if (currentimg != null)
	     g.drawImage(currentimg, xpos, ypos, this);
    }
}