Xref: utzoo comp.sys.mac.programmer:6476 comp.sys.mac.hypercard:1984
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!mcvax!inria!litp!rjp
From: rjp@litp.ibp.fr (Paul ROY)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.hypercard
Subject: multifinder programming help
Message-ID: <2165@litp.ibp.fr>
Date: 19 May 89 20:35:05 GMT
Reply-To: rjp@litp.UUCP (Jean-Paul ROY)
Organization: Institut Blaise Pascal, Paris, FRANCE.
Lines: 38

I am rather new to Macintosh programming, and need some help.
Here is my problem. I want Hypercard and a command language
interpreter (let us call it A) work in a cooperative way. Namely,
Hypercard will be a front-end for hypertext documentation and
questioning the interpreter, and A will be the engine which
will interpret commands. Here is the idea: I introduce some piece
of text into an Hypercard card field, and press ENTER. I have a
XCMD which then places the string into the scrap. Then, A sees
that something has gone into the scrap, takes it, zeroes the scrap,
processes the text, and puts back the answer (a string) into the
scrap. I want Hypercard be notified of the answer and put it
into a special answer card field. Simple ?
Well, I have not yet read a lot of things about programming under
Multifinder, but I suspect that I should use suspend/resume events.
Three problems:
i) How can I "pass the hand" to another *specific* application ? Is
it true that a resume event will launch *next* application (maybe
the Finder) ?
ii) Is the scrap way of making applications communicate right ? I
heard of a new release of Mac OS with Inter Process
Communication, but I can't wait for it (6 months ?).
iii) When the command interpreter A runs, I want it to have the
maximum cpu time for processing the query.
P.S. I know how to write XCMDs/XFCNs, and the command
interpreter A has access to Mac traps, so can set an event loop.

Hope somebody will help...

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