What type of listener should I use to monitor the JFrame's size? I've
looked through the jva documentation (and there are a lot o listeners
that I havent even heard of) and couldn't find a listener that fires
an event when the frames size is changed. I want the user to be able
to change the size, but the window should always be a square, so i
cant say setResizable(false). Just give me the name of the listener
and i can take it from there.