Path: utzoo!attcan!uunet!lll-winken!xanth!ukma!tut.cis.ohio-state.edu!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: X11R3: PointerMotionMask misbehaving
Message-ID: <8904061826.AA01287@EXPIRE.LCS.MIT.EDU>
Date: 6 Apr 89 18:26:54 GMT
References: <8903280231.AA10065@Larry.McRCIM.McGill.EDU>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 9


    [using grabs]
    The problem is, I never see a MotionNotify event.

I took a look at the code you sent me, and discovered that you're calling
XGrabPointer with a confine-to window that has never been mapped.  That's
a no-no, and causes the grab to fail.  XGrabPointer returns status
GrabNotViewable, which you decided not to check (shame on you).  Since the
grab fails, it's attempt to ask for motion events also fails.