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

/** Applet affichant une chaine de caractere avec des couleurs differentes
 *      Vos remarques a vincent.zimmermann@nctech.fr
 *      Utilisable librement.
 *
 *      Exemple d'utilisation dans une page HTML :
 *              
 *      <APPLET CODE="AnimCouleur.class" WIDTH=350 HEIGHT=80>
 *      <PARAM NAME="text" VALUE="NCTech...">
 *      <PARAM NAME="font" VALUE="Helvetica">
 *      <PARAM NAME="style" VALUE="BOLD">
 *      <PARAM NAME="size" VALUE="48">
 *      <PARAM NAME="bgColor" VALUE="255:255:10">
 *
 *      Explications :
 *       font : Helvetica, TimesRoman, Courier, Dialog
 *       style : PLAIN, BOLD, ITALIC, BOLDITALIC
 *       bgColor : 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 AnimCouleur extends java.applet.Applet implements Runnable
{
        // MultiThread pour l'animation
        Thread runThread;

        // Taille de l'applet en pixels
        int width;
        int height;

        // Le message
        String text;
        
        // La police du message
        Font f;
        String fontString;
        int style;
        int size;
        
        // Position du message
        int x;
        int y;
        
        // Le tableau de couleurs
        Color colors[] = new Color[50];
        
        // Couleur du fond
        Color bgColor;
        
    String rgbDelimiter = ":,.";
    StringTokenizer st;
    
        
        public void init()
        {
                // Recuperation des parametres
                
                String s;
                Integer intObj;
                
                text = getParameter("text");
                if (text == null)
                        text = "NCTech...";
                
        s = getParameter("font");
        if (s == null)
            fontString = "TimesRoman";
        else if (s.equalsIgnoreCase("TimesRoman"))
            fontString = "TimesRoman";
        else if (s.equalsIgnoreCase("Courier"))
            fontString = "Courier";
        else if (s.equalsIgnoreCase("Helvetica"))
            fontString = "Helvetica";
        else if (s.equalsIgnoreCase("Dialog"))
            fontString = "Dialog";
        else
            fontString = "TimesRoman";

        s = getParameter("style");
        if (s == null)
            style = Font.PLAIN;
        else if (s.equalsIgnoreCase("PLAIN"))
            style = Font.PLAIN;
        else if (s.equalsIgnoreCase("BOLD"))
            style = Font.BOLD;
        else if (s.equalsIgnoreCase("ITALIC"))
            style = Font.ITALIC;
        else if (s.equalsIgnoreCase("BOLDITALIC") || s.equalsIgnoreCase("ITALICBOLD"))
            style = Font.BOLD + Font.ITALIC;
        else
            style = Font.PLAIN;
                
        try
        {
            intObj = new Integer(getParameter("size"));
            size = intObj.intValue();
        }
        catch (Exception e)
        {
            size = 20;
        }

                f = new Font(fontString, style, size);
                
                
        try
        {
            intObj = new Integer(getParameter("width"));
            width = intObj.intValue();
        } 
        catch (Exception e)
        {
            width = 350;
        }

        try
        {
            intObj = new Integer(getParameter("height"));
            height = intObj.intValue();
        }
        catch (Exception e)
        {
            height = 80;
        }
                
                
        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; 


                setBackground(bgColor);
                
                // Pour un placement correct du message dans la zone d'affichage
                FontMetrics fm = getFontMetrics(f);
                
                int textWidth = fm.stringWidth(text);
                x = (width - textWidth) / 2;
                
                int textHeight = fm.getAscent() + fm.getDescent();
                y = (height - textHeight) / 2 + fm.getAscent();
        }
        
        public void start()
        {
                if (runThread == null);
                {
                        runThread = new Thread(this);
                        runThread.start();
                }
        }
        
        public void stop()
        {
                if (runThread != null)
                {
                runThread.stop();
                runThread = null;
                }
        }

        public void run()
        {
                // Initialise le tableau de couleurs
                float c = 0;
                for (int i = 0; i < colors.length; i++)
                {
                        colors[i] = Color.getHSBColor(c, (float)1.0, (float)1.0);
                        c += .02;
                }
                
                // Boucle sur les couleurs
                int i = 0;
                while (true)
                {
                        setForeground(colors[i]);
                        repaint();
                        i++;
                        try { Thread.sleep(50); }
                        catch (InterruptedException e) { }
                        if (i == colors.length) i = 0;
                }
        }
        
        public void update(Graphics g)
        {
                paint(g);
        }
        
        public void paint(Graphics g)
        {
                g.setFont(f);
                g.drawString(text , x, y);
        }
        
        public String getAppletInfo()
        {
                return "AnimCouleur, april 1997, Vincent Zimmermann at NCTech, France";
        }
}