How to trap applet window closing event?

Question

Hi all,
I would like to know how could one trap the event of the browser window containing an applet being closed by the user?
Thank you,

Answer 1

Hi. this would be useful to me too.
Trouble is, I'm not sure that you can. applet.stop( )
and applet.destroy( ) might be called, but there is
no guarentee that you can complete processing before
you are terminated, especially if you need to do
something slow, like returning state data to your
server. And you can't stop the broswer closing.
I know that in Javascript, you can catch and even
stop the browser window being closed, which is how
things like goggledocs can ask for confirmation
before closing. (window.onbeforeunload( ) ).
I have toyed with the idea of having a
javascript/ajax thread in my html, to catch this
termination, and communicate back to the server from
java to say a document has changed, but it all seems
rather heavyweight for such a simple task.Look at Runtime.addShutdownHook()
You could also try using a WindowListener as well and trap the WindowClose Event.
stop() should do very little other than invalidate the current thread/run flags
and then exit. ie: a stop() example
public void stop()
task = null;
or
public void stop()
running = false;
Your run method should look for a stop condition and then exit.
Otherwise you could be doing stop processing while run is still
running.
(T)