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From: Lawson.English@p88.f15.n300.z1.fidonet.org (Lawson English)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Idle and Hypercard 2.0
Message-ID: <34231.27875327@stjhmc.fidonet.org>
Date: 6 Jan 91 16:25:51 GMT
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Organization: FidoNet node 1:300/15.88 - Tucson Apple Core, Tucson AZ
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Jeff E Mandel Md Ms writes in a message to All

JEM> Here's a question, since MacDTS is on (gasp!) vacation. I have 
an XCMD >which sits in a loop waiting for a condition to match or a timer to
expire, >but I'd like other processes *in* Hypercard to get time.  (That is,
GNE or >WNE won't do the trick.)  Should I SendCardMessage(paramPtr, 'idle')?
 That >doesn't seem to work.  Suggestions are welcome.
>
JEM>  I assume general housekeeping (redrawing windows, etc.) is the 
JEM> main function for which you would want Idle time; there seems 
JEM> no workaround for this except to relinquish control from your 
JEM> XCMD and grab it back after the next idle:

In HC 2.0, there is a callback(?) described on page 460 of the HyperCard 
Script
Language Guide called:

"SendHCEvent(ParamPtr, event);"

This will pass along events recieved from GNE or WNE. As you are (I presume
from the docs) the one in control, you can be scanning for your tickCount 
change
in the loop with GNE/WNE and send SendHCEvent while your tickCount hasn't 
changed
enough to go head with your XCMD task.


Obviouly this was a common problem in 1.xx

Lawson
 

 

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