Path: utzoo!utgpu!watmath!att!bellcore!rutgers!tut.cis.ohio-state.edu!bloom-beacon!goldhill.COM!jne
From: jne@goldhill.COM
Newsgroups: comp.windows.x
Subject: more questions on keyboard focus
Message-ID: <8908081617.AA01554@godzilla.goldhill.com>
Date: 8 Aug 89 16:17:51 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 35


I have a reasonably tricky application regarding keyboard focus and
am not quite sure what to do.

I am building a lisp interface to an X-based window system.
In general, I want the window manager to set the focus to one
of my windows (which I may pass to a different one on my windows
using the WM_TAKE_FOCUS mechanism).  This all works great
using the ICCCM "Locally Active Input" model which allows me to
set focus to any of my client's windows as long as my client
already has the focus.

Here's the problem.  From my lisp listener, which is not one
of my client's windows (it's the xterm from which I invoked lisp),
I can enter:
   (SELECT *WINDOW-1*)
which means that I want *WINDOW-1* to have the focus when the 
window manager wants any of my windows to have the focus.
If I accomplish this by XSetInputFocus of the shell associated
with *WINDOW-1*, I tend to get Bad Match errors.  I assume
this is because 1) the window isn't visible, or 2) none of my
windows has the focus at the time of XSetInputFocus call,
violating the "Locally Active Input" definition.

Do I have to track FocusIn/FocusOut on all my windows
to see if my client has the focus?

Do I need visible_interest set for my shell's class to
determine if it is ok to XSetInputFocus?

Any help would be greatly appreciated.


Jeff Eisen
Gold Hill Computers