Mouse over solution for jdk1.0

Question

hi all,
I am interested in making the equivalent of a mouse over solution for a java applet.
Basically I'll have approximately 100 Rectangle objects representing images on the applet.
When the person moves the mouse over these 100 rectangle objects, i'll use contains() method to determine if the mouse is over the object in question.
If true, the image will be changed to represent the mouse over event .
I thought for a msecond about looping through all the rectangle objects each time the mouse moves. but that seemed impractical since the mouse can move pretty quickly.
It seemed to me the best option was to extend the Rectangle object and put an event listener on it . so that the Rectangle object can be triggered at the same time or individually as needed in response to the mousemove event .
Does anyone have any thoughts about that ?
does anyone know how I would possible implement something like that for java 1.0
thanks
stev

Answer 1

it seems like I have to extend Component some how to get access to enableEvents method.
Here is my class
class ListeningRectangle extends Rectangle{
     public ListeningRectangle(int w, int x, int y, int z, Component c){
          super(w,x,y,z);
          c.enableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
     public void mouseMoved (MouseEvent me) {
     System.out.println("event has been received by rectangle");
I am using this class in conjunction with a java applet (targetted to 1.0-1.1 ).
I'm passing a reference of the applet in to create this ListeningRectangle like this
new ListeningRectangle(a,b,c,d,this);
my objective is to have about 100 different rectangle areas defined on the java applet.
and when the person moves the moves the mouse of the applet rapidly, only the appropriate ListeningRectangle object would respond.
any ideas on how to get this done ? ?
The full code is below
stephen
================================
full source code below
import java.applet.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
public class TestEventHandler extends Applet implements Runnable{
     ///variables
     public static Color bgColor = Color.blue.darker();
     private Thread thread;
     public Graphics offGfx;
     private Image offImg;
     private Image basicOffImg;
     public static int xlen;
     public static int ylen;
public ListeningRectangle lr;
     ///methods
     public void init(){
     xlen = size().width;
     ylen = size().height;
     basicOffImg = createImage(xlen, ylen);
     offImg = basicOffImg;
     offGfx = offImg.getGraphics();
     setBackground(bgColor);
     offGfx.setColor(bgColor);
     offGfx.fillRect(0, 0, xlen, ylen);
     offGfx.setFont(new Font("Arial, Helvetica, Helv", 1, 15));
     FontMetrics fontmetrics = offGfx.getFontMetrics();
     offGfx.setColor(Color.white);
     String s = "pleaseWait";
     offGfx.drawString(s, xlen / 2 - fontmetrics.stringWidth(s) / 2, ylen / 2);
          lr = new ListeningRectangle(20,20,50,50,this);
          offGfx.fillRect(20,20,50,50);
     public void start(){
     if(thread == null)
          thread = new Thread(this);
          thread.start();
     public void run(){
          while(thread != null){
     try
          Thread.sleep(100L);
          catch(InterruptedException _ex) { }
     public void stop()
          if(thread!=null)
     thread = null;
     public void update(Graphics g){ paint(g);}
     public void paint(Graphics g){
     g.drawImage(offImg, 0, 0, null);
public boolean mouseDrag(Event event, int i, int j)
if(true)
return false;//means ripple
} else
return true;//means do not ripple for jvm1.0
public boolean mouseMove(Event event, int i, int j)
if(true)
return false;
} else
return false;
class ListeningRectangle extends Rectangle{
     public ListeningRectangle(int w, int x, int y, int z, Applet c){
          super(w,x,y,z);
          c.enableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
     public void mouseMoved (MouseEvent me) {
     System.out.println("event has been received by rectangle");
}//end of class