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: Unwanted Enter/Leave events during XGrabPointer
Message-ID: <8811251525.AA18138@EXPO.LCS.MIT.EDU>
Date: 25 Nov 88 15:25:09 GMT
References: <495@island.uu.net>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 18


  >    My reading of the event mask passed to XGrabPointer says the Enter/Leave
  >    events should be discarded; is there something I am missing here?

  But is it a bug?

Yes, it is a bug.

  <Long explanation.>

You've apparently missed something.  XGrabPointer has an event mask which
controls dispatch of subsequent pointer-related events to the grab window.
The example provided did an XGrabPointer with owner_events set to False,
meaning *only* this event mask should be obeyed.  Since the mask didn't
have Enter/Leave in it, the application should not have gotten those events.
If, however, you set owner_events to True in the grab, then normal event
dispatch for the client is attempted first, so "underlying" event masks can
apply.