Path: utzoo!attcan!uunet!lll-winken!ames!oliveb!apple!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU
Newsgroups: comp.windows.x
Subject: Re: Pointer grab and LeaveNotify events
Message-ID: <8905112217.AA00444@expire.lcs.mit.edu>
Date: 11 May 89 22:17:24 GMT
References: <7507@spool.cs.wisc.edu>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 12


    It appears that when the Pointer is grabbed, the server forgets to
    send clients LeaveNotify events when the pointer leaves the client's
    window.

It doesn't forget, the protocol doesn't allow it.  Actually, a LeaveNotify
event does get sent when the pointer gets grabbed, but the Intrinsics
discard them (don't ask me why, I don't know, I think it's a misfeature).
This Leave would be sufficient to "solve" the problem (I think you'll notice
that xterm "works", for some definition of "works").  All of this is
complicated by the fact that the protocol doesn't have Focus events sent on
pointer-based focus change; if it did, things would be easier.