blocking, non-modal dialog?

[Allin Cottrell <cottrell wfu edu>]

I'm having trouble engineering the following: a dialog which blocks 
(execution in the caller must not proceed till a choice has been 
made in the dialog's callbacks), but is not modal (the user may want 
to consult other aspects of the gui in the process of making a 
choice).

Or rather, while the above is easy to achieve with gtk_main() in the 
dialog code itself and gtk_main_quit() in a callback to the 
"destroy" signal of the dialog window, the problem is that such a 
dialog stays open when my main app is closed.

I thought I could fix that with 
gtk_window_set_destroy_with_parent(), but this seems to disable the
calling of gtk_main_quit.  That is, when I add destroy_with_parent 
the dialog disappears OK when you exit the app, but the app hangs: 
the gui's gone but gtk_main is still running.

I must be missing something fairly obvious: could anyone tell me 
what it is?  Thanks.

--
Allin Cottrell
Department of Economics
Wake Forest University, NC