/*
 * Copyright (c) 1997-2000 by Mohan Embar. All Rights
 * Reserved. May not be reproduced or distributed
 * without express permission from the author.
 */

import java.awt.*;
import java.io.*;
import java.net.URL;
import java.applet.Applet;

public class IntroPage extends Applet implements Runnable
{
public void paint(Graphics g)
{
    g.drawImage(m_img[m_nImg], 0, 0, null);
    g.drawString(m_arstrMsgs[m_nMsg], 40, 20);
}

public void run()
{
    while (true)
    {
        try
        {
            Thread.sleep(200);
            if (++m_nImg == 2)
                m_nImg = 0;
        }
        catch (InterruptedException e)
        {}

        if (m_nTick++ == 10)
        {
            m_nTick = 0;
            if (++m_nMsg == m_arstrMsgs.length)
                m_nMsg = 0;
        }

        repaint();
    }
}

public void init()
{
    loadImages();
    m_thrd = new Thread(this);
}

public void start()
{
    m_thrd.start();
}

public void stop()
{
    m_thrd.stop();
}

// private //
private void loadImages()
{
    MediaTracker tracker = new MediaTracker(this);
    String[] arstrImages = {"PegLgLft.gif", "PegLgRgt.gif"};

    for (int i=0; i<arstrImages.length; i++)
    {
        // Read the image from our .jar file.
        String strImage = "/images/" + arstrImages[i];
        m_img[i] = getImage(strImage);
    }

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

/**
 * Returns a random number between 0 and nMax-1.
 */
private static int random(int nMax)
{
    double d = Math.random();
    return (int) (d*nMax);
}

private int m_nTick = 0;
private int m_nMsg = 0;
private Thread m_thrd = null;

private String[] m_arstrMsgs =
{
    "Hey there! My name's ThisIsCool(TM).",
    "I'm the mascot of these pages.",
    "Browse around! There's lots of neat stuff.",
    "Check out the cool demos!",
    "You'll find Java board game...",
    "...a Mastermind(TM) clone in JavaScript...",
    "...BSBingo(TM) for PalmOS...",
    "...and a cool Number Speller.",
    "Enjoy your visit! And tell me what you think!",
};

// (Improvement: read this from a file instead of hardcoding it.)

private int m_nImg = 0;
private Image[] m_img = new Image[2];

private Image getImage(String strImage)
{
    Image img = null;
    try
    {
        DataInputStream dis =
            new DataInputStream
            (
                getClass().getResourceAsStream(strImage)
            );
        byte[] data=new byte[dis.available()];
        dis.readFully(data);
        dis.close();
        img = Toolkit.getDefaultToolkit().createImage(data);
    }
    catch(Exception e)
    {}
    return img;
}
}