Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ucdavis!iris!lim
From: lim@iris.ucdavis.edu (Lloyd Lim)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Death of jGNEFilter?
Message-ID: <6020@ucdavis.ucdavis.edu>
Date: 24 Nov 89 09:33:18 GMT
References: <2323@hudson.acc.virginia.edu> <9068@hoptoad.uucp>
Sender: uucp@ucdavis.ucdavis.edu
Reply-To: lim@iris.ucdavis.edu (Lloyd Lim)
Organization: U.C. Davis - Department of Electrical Engineering and Computer Science
Lines: 40

In article <9068@hoptoad.uucp> tim@hoptoad.UUCP (Tim Maroney) writes:
>In article <2323@hudson.acc.virginia.edu> cak3g@astsun8.astro.Virginia.EDU
>(Colin Klipsch) writes:
>>[...]
>>If I wish to remain compatible with future Macs (as I do in fact), how
>>does one respond to events without using jGNEFilter?  Will there be some
>>new method?  Is there a more subtle way of responding to events of
>>which I am not aware?
>
>Sure, just tail patch GetNextEvent!  Seriously, the answer to your
>question is that there is no way to do this kind of thing and be
>compatible with the guidelines.  You can either tail patch, which may
>break now or soon, or use jGNEfilter, which may break in 1991.  I'd go
>for the latter, that is, keep doing what you're doing now.

The best suggestion I can make is that you can head patch PostEvent and
PPostEvent if your patch doesn't move memory.  If you're doing something else
that doesn't move memory this might work for you.

But you want to play sounds...  (BTW, TappyType doesn't play on my IIcx unless
I disabled all my INITs.  Since it's not life or death, I didn't bother to
find out which one it was and I just don't use it.)

How about setting a flag in your PostEvent head patches and checking for it in
a head patch to GetNextEvent and company?  Depending on the flag, you can play
your sound(s) before GetNextEvent gets called.  It shouldn't matter what
event mask the call has since you just want to play sounds whenever a key was
previously hit.  I haven't fully thought this through but it sounds ok to me.
Anyone think of any problems with this?

(Hey, if this works, we can start a consulting business here!  First we (the
collective body of comp.sys.mac.programmers) figure how to make the trash can
flush, then we figure out how to make the keyboard into a typewriter!  Give
us a tail patch and we'll try to come up with some insanely complex clean
way to do it!  :-)  Now watch someone give a reason why my method won't work.)

+++
Lloyd Lim     Internet: lim@iris.ucdavis.edu (128.120.57.20)
              Compuserve: 72647,660
              US Mail: 146 Lysle Leach Hall, U.C. Davis, Davis, CA 95616