Making something happen on mouse click in separate class

Question

Hi, I have two classes, Pixel, and Calc. Calc extends applet and pixel extends canvas. Calc creates instances of pixel in the applet, and what i want to happen is that when the user clicks on a pixel, it changes color. however, no color changing was happening. i tried inserting some debug code, and that didnt show up which makes me think the event isn't even happening at all. here's my code:
pixel.java
import java.awt.*;
import java.awt.event.*;
public class Pixel extends Canvas implements ActionListener {
     private Color c;
     public Pixel() {
          setSize(10,10);
          c = Color.yellow;
     public void paint(Graphics g) {
          g.setColor(c);
          g.fillRect(0,0,10,10);
     public void actionPerformed(ActionEvent e) {
          c = Color.black;
          System.out.println("in event code...");
}calc.java
import java.applet.*;
import java.awt.*;
import javax.swing.*;
public class Calc extends Applet implements ActionListener {
     private Pixel test;
     public void init() {
          test = new Pixel();
          add(test);
     public void paint(Graphics g) {
     public void actionPerformed(ActionEvent e) {
<applet code="Calc.class" width=400 height=400>
</applet>
*/what do i need to do??? thanks for your help
Tom

Answer 1

if you want something to happen you need to "activate" the actionlisternersomething.addActionListener(this);but if you want something to happen when you click with you mouse you need to implement MouseListenerimplements ActionListener, MouseListener{
  public void mouseClicked(MouseEvent me){}
  public void mousePressed(MouseEvent me){}
  //and other methods..
}It has several mouseevents that you can use..
then add the listener to the pixelclass, or in your mainclasspublic class Calc implements MouseListener{
  private pixel test;
  test.addMouseListener(this);
  public void mousePressed(MouseEvent me){
    test.setColor(new Color(255,255,255));
}to make this work you need a setColor method in your class pixelpublic class Pixel .. {
  //the old stuff
  public void setColor(Color col){
    c = col;
}hope it helps..