Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!versatc!arisia!sgi!shinobu!odin!fudge!karlton
From: karlton@fudge.sgi.com (Phil Karlton)
Newsgroups: comp.windows.x
Subject: Re: Trackball interface from the mouse/pointer?
Message-ID: <146@odin.SGI.COM>
Date: 13 Jun 89 23:43:44 GMT
References: <8906122229.AA28290@prometheus.think.com> <8906131957.AA00946@expire.lcs.mit.edu>
Sender: news@odin.SGI.COM
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 15

In article <8906131957.AA00946@expire.lcs.mit.edu> rws@EXPO.LCS.MIT.EDU writes:

>    1) How I can distinguish a mouse event from a warp event.

>There is no direct way to do what you want, but here's something you can
>try.  Motion events have a sequence number in them.  You can match this
>with the sequence number of your WarpPointer request, and use it as an
>indicator of which events to throw away.

In addition, if you follow the WarpPointer immediately with a
NoOperation request, the serial number in the incoming motion events
will only match that of the WarpPointer request for a short amount of
time.

PK