Detect a Click on an image

Question

Is there any way to detect when a user clicks on a certain image in an applet. If I have image1 and image2 and the user clicks on image1 can I trap that event somehow?

Answer 1

I am creating an image using getImage and then
displaying it in the paint method.I'll assume that you are painting the image inside some subclass of java.awt.Component, instead of a paint methos declared somewhere else.
You should add a MouseListener to your class. This MouseListener needs to know the location and size of the image. I'll assume you already have methods in your Component to get the location of the image [upper-left corner, as a java.awt.Point object, relative to the Component] and the size of the image [as a java.awt.Dimension object]
During Component initalization, or possibly the image initialization add the following code:
myComponent.addMouseListener(new MouseAdapater() { public void mouseClicked(MouseEvent me) {if (me.getSource() == myComponent && (new Rectangle(getImageLocation(), getImageSize()) ).contains(me.getPoint()) ) { /* Do the stuff you need to do on the click*/ } });Of course, it probably should be better formatted and you may want to add additional constraints to performing the action like SwingUtilities.isLeftMouseButton(me) and/or me.getClickCount() == 1.
Since this MouseListener is an anonymous inner class, you'll need to make any variables it needs access to final or create accessor methods for them.
You could also implement the MouseListener as a named inner class. Then it would have access to all (non-private?) variables, not just those that are final.