🚀 go-pugleaf

import java.awt.*;
import java.util.StringTokenizer;

/** Applet dessinant une balle qui rebondit sur les parois.
 *      Vos remarques a vincent.zimmermann@nctech.fr
 *      Utilisable librement.
 *
 *      Exemple d'utilisation dans une page HTML :
 *      <APPLET CODE="BalleVZ.class" WIDTH=400 HEIGHT=100>
 *      <PARAM NAME="ballSize" VALUE="25">
 *      <PARAM NAME="speed" VALUE="2">
 *      <PARAM NAME="initialX" VALUE="10">
 *      <PARAM NAME="initialY" VALUE="5">
 *      <PARAM NAME="bgColor" VALUE="yellow">
 *      <PARAM NAME="fgColor" VALUE="black">
 *      <PARAM NAME="timeSleep" VALUE="15">
 *      Il aurait du y avoir une applet ici si votre Browser avait supporte Java...
 *      </APPLET>
 *
 *      Explications :
 *       bgColor & fgColor : white, black, lightGray, gray, darkGray, red, green, 
 *                       blue, yellow, magenta, cyan, pink, orange
 *                (RGB)    : 255:255:255
 *                (RGB)    : 255,255,255
 *                (RGB)    : 255.255.255
 *
 */


public class BalleVZ extends java.applet.Applet implements Runnable
{
        // On cree un Thread pour l'applet
        Thread runner;
        
        // Les coordonnees de la balle, et son vecteur deplacement
        int x;
        int y;
        int depX;
        int depY;
        
        int initialX;
        int initialY;

        // L'unite de deplacement en pixels
        int speed;
        
        // Temps d'attente entre 2 plans de l'animation
        int timeSleep;

        // Couleur du fond et de la balle
        Color bgColor;
        Color fgColor;

        // Grosseur de la balle
        int ballSize;

        // Taille de l'ecran
        int width;
        int height;

        // Pour le double buffering (eviter les scintillements)
        Image offscreenImg;
        Graphics offscreenG;

        // Pour la gestion des couleurs RGB
    String rgbDelimiter = ":,.";
    StringTokenizer st;
    
        boolean threadSuspended = false;


        public void aleatoir()
        {
                // Nombre entier aleatoire entre -3 et 3
                depX = ((int)Math.floor(Math.random() * 7)) - 3;
                depY = ((int)Math.floor(Math.random() * 7)) - 3;
                if ((depX == 0) || (depY == 0)) aleatoir();
        }

        public void init()
        {
                // Recuperation des parametres de l'Applet
                String s;
                Integer intObj;
                
                // Pour obtenir la taille de l'Applet en pixels.
        try
        {
            intObj = new Integer(getParameter("width"));
            width = intObj.intValue();
        } 
        catch (Exception e)
        {
            width = 300;
        }

        try
        {
            intObj = new Integer(getParameter("height"));
            height = intObj.intValue();
        }
        catch (Exception e)
        {
            height = 100;
        }


        try
        {
            intObj = new Integer(getParameter("ballSize"));
            ballSize = intObj.intValue();
        }
        catch (Exception e)
        {
            ballSize = 20;
        }

        try
        {
            intObj = new Integer(getParameter("initialX"));
            initialX = intObj.intValue();
        }
        catch (Exception e)
        {
            initialX = 0;
        }

        try
        {
            intObj = new Integer(getParameter("initialY"));
            initialY = intObj.intValue();
        }
        catch (Exception e)
        {
            initialY = 0;
        }

        try
        {
            intObj = new Integer(getParameter("speed"));
            speed = intObj.intValue();
        }
        catch (Exception e)
        {
            speed = 2;
        }

        try
        {
            intObj = new Integer(getParameter("timeSleep"));
            timeSleep = intObj.intValue();
        }
        catch (Exception e)
        {
            timeSleep = 2;
        }

        s = getParameter("bgColor");
        if (s != null) st = new StringTokenizer(s, rgbDelimiter);

        if (s == null)
            bgColor = Color.lightGray;
        else if (s.equalsIgnoreCase("white"))
            bgColor = Color.white;
        else if (s.equalsIgnoreCase("black"))
            bgColor = Color.black;
        else if (s.equalsIgnoreCase("gray"))
            bgColor = Color.gray;
        else if (s.equalsIgnoreCase("darkGray"))
            bgColor = Color.darkGray;
        else if (s.equalsIgnoreCase("red"))
            bgColor = Color.red;
        else if (s.equalsIgnoreCase("green"))
            bgColor = Color.green;
        else if (s.equalsIgnoreCase("blue"))
            bgColor = Color.blue;
        else if (s.equalsIgnoreCase("yellow"))
            bgColor = Color.yellow;
        else if (s.equalsIgnoreCase("magenta"))
            bgColor = Color.magenta;
        else if (s.equalsIgnoreCase("cyan"))
            bgColor = Color.cyan;
        else if (s.equalsIgnoreCase("pink"))
            bgColor = Color.pink;
        else if (s.equalsIgnoreCase("orange"))
            bgColor = Color.orange;
        else if (st.countTokens() == 3) {
            Integer r = new Integer(st.nextToken());
            Integer g = new Integer(st.nextToken());
            Integer b = new Integer(st.nextToken());
            bgColor = new Color(r.intValue(), g.intValue(), b.intValue());
        } else
            bgColor = Color.lightGray; 

        s = getParameter("fgColor");
        if (s != null) st = new StringTokenizer(s, rgbDelimiter);

        if (s == null)
            fgColor = Color.lightGray;
        else if (s.equalsIgnoreCase("white"))
            fgColor = Color.white;
        else if (s.equalsIgnoreCase("black"))
            fgColor = Color.black;
        else if (s.equalsIgnoreCase("lightGray"))
            fgColor = Color.lightGray;
        else if (s.equalsIgnoreCase("gray"))
            fgColor = Color.gray;
        else if (s.equalsIgnoreCase("darkGray"))
            fgColor = Color.darkGray;
        else if (s.equalsIgnoreCase("red"))
            fgColor = Color.red;
        else if (s.equalsIgnoreCase("green"))
            fgColor = Color.green;
        else if (s.equalsIgnoreCase("blue"))
            fgColor = Color.blue;
        else if (s.equalsIgnoreCase("magenta"))
            fgColor = Color.magenta;
        else if (s.equalsIgnoreCase("cyan"))
            fgColor = Color.cyan;
        else if (s.equalsIgnoreCase("pink"))
            fgColor = Color.pink;
        else if (s.equalsIgnoreCase("orange"))
            fgColor = Color.orange;
        else if (st.countTokens() == 3) {
            Integer r = new Integer(st.nextToken());
            Integer g = new Integer(st.nextToken());
            Integer b = new Integer(st.nextToken());
            fgColor = new Color(r.intValue(), g.intValue(), b.intValue());
        } else
            fgColor = Color.yellow; 


                setBackground(bgColor);
                offscreenImg = createImage(width, height);
                offscreenG = offscreenImg.getGraphics();

                x = initialX;
                y = initialY;

                aleatoir();
        }
                
        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()
        {
                while (true)
                {
                        if (x >= (width - ballSize) || x <= 0)
                                { depX = -depX; x += depX * speed; }
                        else if (y >= (height - ballSize) || y <= 0)
                                { depY = -depY; y += depY * speed; }
                        else { x += depX * speed; y += depY * speed; }
                        
                        repaint();
                        
                        try { Thread.sleep(timeSleep); }
                        catch (InterruptedException e) { }
                }
        }

        public void update(Graphics g)
        {
                paint(g);
        }

        public void paint(Graphics g)
        {
                offscreenG.setColor(bgColor);
                offscreenG.fillRect(0, 0,  width, height);

                offscreenG.setColor(fgColor);
                offscreenG.fillOval(x, y, ballSize, ballSize);

                g.drawImage(offscreenImg, 0, 0, this);
        }
        
        public boolean mouseDown(Event e, int x, int y)
        {
                if (threadSuspended)
                        runner.resume();
                else
                        runner.suspend();
                threadSuspended = !threadSuspended;
                return true;
        }
        
        public String getAppletInfo()
        {
                return "BalleVZ, april 1997, Vincent Zimmermann at NCTech, France";
        }
}

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