Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hoptoad!tim
From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Shutdown sequence question
Message-ID: <9242@hoptoad.uucp>
Date: 10 Dec 89 07:42:03 GMT
References: <1989Dec7.083540.3798@agate.berkeley.edu>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 38

In article <1989Dec7.083540.3798@agate.berkeley.edu> rgm@OCF.Berkeley.EDU
(Robert Menke) writes:
>This is beginning to bother me.  How does the Finder (under
>MultiFinder) send messages to each of the open applications to close
>when the user selects "Shut Down" from the "Special" menu?

By magic.  It goes through the MultiFinder list of applications,
searches each one for a quit command in the file menu, posts a fake
mouse-down event in the menu bar, and patches MenuSelect to return the
number of the required menu item.  It then waits for the application
quit, including any necessary save dialogs.  You can't do this and it
would be unwise to try.

>Obviously it is not a patch to the _Shutdown macro (or is it? I'm not
>sure how patches are handled under MultiFinder) nor does it seem to be
>procedures installed via ShutDwnInstall (or do procedures installed
>only execute if the application containing them is the active one?
>That would seem silly).

Nope, the Shutdown Manager is not involved.  If you call Shutdown from
your own program, it's tough cookies for any other applications that
may be running at the time.  The Finder does it strictly in response to
receiving the Restart and Shut Down menu commands.  Hopefully, the
Shutdown manager will do this in System 7.0, but I wouldn't hold my
breath.  (Since you'll be able to give a Finder menu command from other
applications then anyway, it's not really mandatory.)

>This is bothersome to me because I use MPW 2.0.2 as a CLI more often
>than I use the finder, and it's irritating to have to flip out to the
>finder to quit (even MPW's "shutdown" command fails to notify
>applications).

Yep.  It's a pain.  No good way around it, though.
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

"There are no Famous People on the net.  Only some of us with bigger mouths
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