NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/comp/sys/atari/st/tech/4499

Internet Message Format | 1992-08-20 | 1.9 KB

Path: sparky!uunet!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!yale!gumby!destroyer!ubc-cs!van-bc!jonh.wimsey.bc.ca!jhenders
From: [e-mail] (John Henders)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: How to hook into GEM?
Message-ID: <[e-mail]>
Date: 20 Aug 92 06:33:04 GMT
References: Re: How to hook into GEM?
Reply-To: [e-mail]
Organization: Totally Nonexistent
Lines: 33
X-Software: HERMES GUS 1.03 Rev. Apr 14 1992

In <[e-mail]>, Steven Eker writes:
>
>Suppose I write a snazzy motif-like GUI, how do I hook into GEM so that I
>can run GEM DAs from my snazzy 3D menu? More particularly
>
>1. How do I find the full (menu entry) names of the available DAs?
>
>2. How do I find the 8 char names for appl_find()?

    I've never tried to do this, but you'd have to hook into the trap #2
call, i think, and look for the menuregister call from the desk accessory.
The main problem is that appearantly Gem replaces it's own vector in
the trap #2 vector handler after certain calls, so you have to recheck it
and re-replace it. There was a text file from Charles Johnson that I seem
to remember described the process, but I don't have it. Maybe someone else
does. You'd only need to hang onto it until the accessorys had all
registered, I'd imagine. Also, you'd probably want to pass the menu
register on to the AES when your done so the accessories could receive the
messages you then send down the message pipe.
>
>3. Is it sufficient to just to send the DA a suitable message thru its pipe
>or does more need to be done to get it active?
>
    Once you know the id and name, it should be possible to send acc_open
messages. Harlekin allows keyboard macros to send open messages, so it
should be possible, though of course Harlekin manages it's own protocals.

    These tricks are probably likely to break on various versions of the
os as well.


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