Window Owners and Focus Losing

Question

Hi!
I originally posted this message in the Swing forum. I haven't gotten any hits on it, yet, so if anybody can shed any light on the situation, I would very much appreciate it.
There are 5 dukes up for grabs!
Thanks,
- Adam

Answer 1

That's a tricky one, in part because focus goes to a
specific component within a window hierarchy.
You could create a common focus listener on your
popup, to determine if any of its components
loses focus to something that's not one of its
components. However, that doesn't really work too
well, because depending on how you've created it,
none of its components may get focus in the first
place.that also makes the code more compicated, less portable, and more difficult ot maintain, because I'd have to find someway to track which components are in that window, and they're not necessarily always the same.
>
You could also attach a mouse listener to the glass
pane of the owning frame (assuming it's a frame), and
respond to mouse clicks in that pane.that's not a bad idea for a small application, but unfortunately, it won't be practical in the application I'm working with on, because there's too much other stuff going on to start intercepting events in the glass pane.
>
I suspect that there's an easier way. You could
probably find it by looking in the source code for
JPopupMenu.Yeah, I considered that too. I only looked breifly, but I can't find any relevant code that is dealing with either window or focus events, and I'm not quite sure how it's displaying itself. I suppose the relevant code could be in the UI delegate, I haven't check there yet...
- Adam