Mouse clicks on shapes drawn on canvas

Question

I'm having some trouble adding a mouseListener to a shape I've drawn on a canvas.
I'm drawing a circle using g.drawOval() and then filling it in with the g.fillOval().
The thing is I want the circle to be sensitive to mouse clicks on it, I'm trying to write the classic dots and boxes game, so I can draw a line from it to the
next circle (dot) clicked.
Unfortunately, the circle is not picking up on the mouseClicked event, I'm pretty sure my dotActions class works because I used it on another class which extends JLabel and it works fine, that is when the label is clicked the program exits, but when I add it to the Dots class it doesn't pick up on any mouse events.
Here is my code, any help would be appreciated, thanks.
public class Dots extends Canvas {
public Dots(gameBoard gb, Graphics g, int x, int y, int hspace, int vspace){
g.drawOval(x, y, 10, 10);
g.fillOval(x, y, 10, 10);
dotActions da = new dotActions(this);
addMouseListener(da);
public class dotActions implements MouseListener{
public void mouseClicked(MouseEvent e){
//this is a test to see if the mouse event is picked up
System.exit(0);
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
public void mousePressed(MouseEvent e)
public void mouseReleased(MouseEvent e)
}

Answer 1

Create a shape and add the listener to that as well as drawing to the screen.
Or what I did was to save all the shapes and then test the mouse point to see if current mouse point was inside any. In my case I am using it to provide context sensitive help
MArk
* handle context sensitive tooltips - replaces default java
* routine with our own which is context sensitive
public String getToolTipText(MouseEvent e)
Point raw_p = e.getPoint();
//convert to our co-ords
Point p = new Point(screenToScaledCoordsX((int) raw_p.getX()),
screenToScaledCoordsY((int) raw_p.getY()));
String tip = null;
//check any tooltips to see if match found
if (number_of_tooltips > 0)
//check each object and get master tooltip text if inside rectangle if on
//same page - go through all as text objects added before titles which will then be picked up
for (int i = 0; i < number_of_tooltips; i++)
if ((tool_tip_page[i] == last_page_id) &&
(tool_tip_rectangle.contains(p)))
tip = tool_tip_text[i];
//return default or ours
return tip;