Path: utzoo!attcan!uunet!husc6!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: too many motion notify events
Message-ID: <8812201308.AA23456@EXPO.LCS.MIT.EDU>
Date: 20 Dec 88 13:08:11 GMT
References: <10759@tekecs.TEK.COM>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 9


    What I'd like to do would be to have a
    function which like XCheckMaskEvent which returns False if the queue
    is empty OR if the next event on the queue fails to match the mask.

With a little cleverness, you can do almost anything with XIfEvent.
You'll need to store and look at extra state somewhere in the "arg".
Not all that elegant (the predicate probably should have been designed
with a "giveup" return value), but it will work.