Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!boulder!pratt
From: pratt@boulder.Colorado.EDU (Jonathan Pratt)
Newsgroups: comp.sys.mac.programmer
Subject: Re: why does a ModalDialog filter proc get empty update events?
Summary: No pre-filtering...
Keywords: ModalDialog filterproc update empty
Message-ID: <10397@boulder.Colorado.EDU>
Date: 1 Aug 89 04:10:40 GMT
References: <4468@uhccux.uhcc.hawaii.edu> <3257@internal.Apple.COM>
Sender: news@boulder.Colorado.EDU
Reply-To: pratt@boulder.Colorado.EDU (Jonathan Pratt)
Organization: University of Colorado, Boulder
Lines: 19

In article <3257@internal.Apple.COM> jerryg@Apple.COM (Jerry Godes) writes:
[Notes that ModalDialog passes update events for other windows]

>My question now is why is an update event being generated for the other
>window?  Maybe I'll go snooping in MacsBug a bit later and see what's going
>on.
>
This is a pretty common gotcha.  I guess we just assume that ModalDialog
is going to do some pre-filtering for us so that we only receive events
related to the dialog window, but in fact I believe you get the event
pretty much straight from GetNextEvent (which means of course that you'll
hear if *any* of your windows needs updating).

Jonathan

/* Jonathan Pratt          Internet: pratt@boulder.colorado.edu     *
 * Campus Box 525              uucp: ..!{ncar|nbires}!boulder!pratt *
 * University of Colorado                                           *
 * Boulder, CO 80309          Phone: (303) 492-4293                 */