TextScroller II

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

public class textscroller2 extends Applet implements Runnable {

public Thread animationthread = null;
public String message;
public int x=100;
Image bufferimage;
Graphics bufferg;

//The following colors are fetched as
//HEXADECIMAL parameters and are used
//to set the background and text color
//of the applet.
Color backgroundcolor,textcolor;

//The "delay" variable is used as a delay
//for each picture frame.
int delay=0;

public void init()
{
    //We read the message as a paramter instead at the same
    //time as we read a paramter called "delay" for the
    //picture delay.
    message=getParameter("message");
    delay=getIntegerParameter("delay",10);

    //Please note that we read the values in
    //HEXADECIMAL form (with the base 16)
    //and then create a color.
    backgroundcolor=new Color(getIntegerParameter("backgroundcolor",16));
    textcolor=new Color(getIntegerParameter("textcolor",16));

    //The following lines are just copied from
    //slideshow2.java
    Dimension d=size();
    bufferimage=createImage(d.width,d.height);
    bufferg=bufferimage.getGraphics();
}

public int getIntegerParameter(String name, int base)
{
    String value=getParameter(name);
    int intvalue;
    try {intvalue=Integer.parseInt(value,base);}
    catch (NumberFormatException e) {return 0;}
    return intvalue;
}

public void start()
{
    if (animationthread == null)
    {
         animationthread = new Thread(this,"animationthread");
         animationthread.start();
    }
}

public void stop()
{
    if ((animationthread != null) && animationthread.isAlive())
        animationthread.stop();
    animationthread = null;
}

public synchronized void paint(Graphics g)
{
    //It is always a good idea to check
    //that bufferg has been initialized.
    if (bufferg!=null)
    {
        //Paint the screen with the fetched
        //background color.
        bufferg.setColor(backgroundcolor);
        bufferg.fillRect(0,0,100,20);

        //Draw the message starting from
        //position "x"
        bufferg.setColor(textcolor);
        bufferg.drawString(message,x,12);
        g.drawImage(bufferimage,0,0,this);
        if (x<-400) x=100;
        x--;
    }
}

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

public void run()
{
    while (true)
    {
        update(getGraphics());

        //The "delay" variable now makes
        //the delay configurable.
        try {Thread.sleep(delay);}
        catch(InterruptedException e) {}
    }
}
}
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