[racket] gui application open without frame?

You need to install a quit handler via `application-quit-handler'.
The quit handler is invoked by the "Quit" menu item.

At Mon, 21 Nov 2011 15:08:37 -0500, Louis-Philippe wrote:
> right now, having
> (yield (make-semaphore))
> at the end of my program, the application doesn't exit and my root menu-bar
> stays...  but the quit menu doesn't work anymore...  should I override it,
> but with what, or am I missing something?
> 
> thanks!
> 
> 2011/11/21 Matthew Flatt <mflatt at cs.utah.edu>
> 
> > At Mon, 21 Nov 2011 13:40:06 -0500, Louis-Philippe wrote:
> > > I looked around the docs for racket/gui and I can't find how to do
> > > something very basic...  how can I leave a racket/gui app opened after
> > all
> > > windows have closed so that the root menu-bar can stay visible?
> >
> > You'll need to add a call to `yield' to the end of your program to wait
> > until your application quit handler exits. For example, you might add
> >
> >  (yield (make-semaphore))
> >
> > assuming that your quit handler exits via `exit', or you could use
> >
> >  (define s (make-semaphore))
> >  (yield s)
> >
> > with a quit handler that exits via `(semaphore-post s)'.
> >
> >