Graph applet

Question

hello,
i wish to draw a line graph in a certain region(ex. rectangle),even when exceeds the dimentions of the rectangle i want to display the current plot...
for ex. http://java.sun.com/products/java-media/2D/samples/java2demo/Java2Demo.html
in Arcs_Curves one can see a line plot at rightbottom ,shifting the curve to left,i need the same logic ,ofcourse i have the running curve..
just i need the logic how the curve is moving to left.
any suggestons are accepted...a few lines of code is too good...
thank you,
bhaskar..

Answer 1

thanks for the comments,but i mentioned i have the graph,just i need to fit in a certain area...
here i am sending an example of my code...
import java.awt.*;
import java.awt.Button;
import java.awt.event.*;
public class MyApplet extends java.applet.Applet implements ActionListener, Runnable {
int xSPos,ySPos,xOrig,yOrig,width,height;
private Thread run = null;
private boolean running;
private Image bufferImage;
private Graphics bufferGraphics;
Button start;
public void init() {
setBackground(Color.white);
setSize(450,300);
start = new Button("Start");
add(start);
start.addActionListener(this);
public void actionPerformed(ActionEvent ae) {
try {       
System.err.println( "run is: "+run );
if( run != null ) {
run.interrupt();
run.join();
run = new Thread(this);
run.start();
} catch( InterruptedException ie ) {
repaint();
public void paint(Graphics g) {
update(g);
public void update(Graphics g) {
     if(bufferImage != null)
          g.drawImage(bufferImage,0,0,this);
public void run() {
running = false;
int W = 0,H = 0;
     if(bufferGraphics == null) {
          Dimension d = getSize();
          W = d.width;
          H = d.height;
          bufferImage = createImage(W,H);
          bufferGraphics = bufferImage.getGraphics();
xSPos = 50;
ySPos = 80;
width = 200;
height = 100;
xOrig = xSPos;
yOrig = ySPos+height;
int xLocP = xOrig;
int yLocP = yOrig;
int xMax = 150;
int yMax = 90;
for(int i=0; i<=500; i++) {
int xLoc = xOrig;
int yLoc = yOrig;
xLoc = xLoc+Math.round(width*i/xMax);
yLoc = yLoc-Math.round(height*i/yMax);
bufferGraphics.setColor(Color.black);
bufferGraphics.drawRect(xSPos,ySPos,width,height);
bufferGraphics.setColor(Color.blue);
bufferGraphics.drawLine(xLocP, yLocP, xLoc, yLoc);
try {
Thread.sleep(350);
catch(Exception ex) {
          repaint();
xLocP = xLoc;
yLocP = yLoc;
run = null;
     running = false;
bufferGraphics = null;
     //repaint();
from this output when the line crosses the dimentions of rectangle,the old points should delete so that there will be space to draw for new values...got my point...
once more thankyou...