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From: jmck@Eng.Sun.COM (John McKernan)
Newsgroups: comp.windows.open-look
Subject: Re:  Panels and events
Message-ID: <rmczv1w@openlook.Unify.Com>
Date: 9 Nov 90 19:31:01 GMT
Lines: 29


>I am assuming you are using xview in which case you can use
>notify_dispatch routine in you compute routine to handle the
>events that come in.  Your Pause/interrupt routine could then
>set a flag that could then be checked when you are in the
>compute routine.
>    \\ \	Nolan C. Toone, Catalyst Tech Support

Note that if you use notify dispatch, you can't use xv main loop.
Also you can't call notify dispatch from a notify proc. An alternative
is to do your drawing in an itimer function which is called every half
second, or any other interval. Here's some example code for that
approach:

#include <sys/time.h>

struct itimerval delay = {0,0,0,0};

void my_wait( seconds, funcptr )
   int seconds;
   Notify_func (*funcptr) ();
{
   delay.it_interval.tv_sec = seconds;
   delay.it_value.tv_sec = seconds;
   notify_set_itimer_func( frame, funcptr, ITIMER_REAL, &delay, NULL );
}

John McKernan.                                                     
Windows and Graphics Software, Sun Microsystems.                  jmck@sun.com