Path: utzoo!attcan!uunet!cbmvax!vu-vlsi!swatsun!jackiw
From: jackiw@cs.swarthmore.edu (Nick Jackiw)
Newsgroups: comp.sys.mac
Subject: Re: Modal dialogs vs. layer switching
Summary: Not so easy as it seems
Message-ID: <2301@ilium.cs.swarthmore.edu>
Date: 13 Jan 89 16:01:27 GMT
Reply-To: jackiw@ilium.UUCP (Nick Jackiw)
Followup-To: comp.sys.mac.programmer
Organization: Visual Geometry Project, Swarthmore College, PA
Lines: 31

In article <878@lts.UUCP> amanda@lts.UUCP (Amanda Walker) writes:
> 
> Note that inhibiting layer switches is done solely on the basis of the
> variation code of the front window, not whether ModalDialog is being
> called.  Since the variation code for a dialog's window is part of the
> ProcID field in the dialog's DLOG resource, you should be able to go in
> with ResEdit or REdit and change dialogs to use, say, altDBoxProc and
> thus make them only modal to their own layer (since that's controlled
> by ModalDialog), without having to modify any application code.
> 
> Amanda Walker			...!uunet!lts!amanda / lts!amanda@uunet.uu.net
> 			  InterCon, 11732 Bowman Green Drive, Reston, VA 22090
> --

Hmm. I thought about this yesterday, but in all the apps I've actually tried
it on, I either get bombs (as soon as the call goes to _ModalDialog) or I get
dBoxProc "layer-freeze" behavior regardless of the ProcID.  It DOES seem like
switching out of modals shouldn't be too detrimental, in most cases: your
layer's back-windows wouldn't get updated, but that's no problem.  Does any-
one on the NET know the full set of criteria which MultiFinder employs to
keep from switching?  Additionally, does anyone know why a call to ModalDialog
might address-error-bomb simply based on the ProcID?  I'm perplexed.

Follow-ups to *.programmer.


-- 
+-------------------+-jackiw@cs.swarthmore.edu / !rutgers!bpa!swatsun!jackiw-+
|  nicholas jackiw  | jackiw%campus.swarthmore.edu@swarthmr.bitnet           |
+-------------------+-VGP/MathDept/Swarthmore College, Swarthmore, PA 19081--+
                          PER ASPERA AD ASTRA