Article View: gnu.epoch.misc
Article #769Bug in event-handling using twm.
From: Huub Bakker
Date: Mon, 17 May 1993 13:07
Date: Mon, 17 May 1993 13:07
33 lines
1756 bytes
1756 bytes
Hello Epoch-world,
We observed the following strange behaviour using Epoch with the twm
window manager on a Silicon Graphics Iris 4000 machine running IRIX 4.0.5 F.
Using:
(setq *select-screen-hook* 'call-upon-screen-entrance)
we print a message using send-string-to-terminal each time the mouse enters an
Epoch screen. It works fine, but fails if:
1) we use twm (vtwm, mwm and 4Dwm do not give any problems) and,
2) we drag the mouse "quickly" into the Epoch screens X-window.
In this case the call-upon-screen-entrance function is called twice. As far as
we can see (using xev) the X-server sends only one EnterWindow event to Epoch.
After this the internal state about window focus and current-screen of Epoch
is lost. From now on the call-upon-screen-entrance functions is only called
when the mouse is dragged "quickly" and allways is called two times.
Does anybody know what's wrong here?
Greetings, Huub.
P.S.: We do have the same bug on Sun SparcStation running SunOS 4.1.2.
using twm.
--
CWI, P.O. Box 4079 Huub Bakker (huub@cwi.nl)
1009 AB Amsterdam
The Netherlands
Tel. 31 20 5924080
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fc7ee,611615fd9a092578,start X-Google-Attributes: gidfc7ee,public X-Google-ArrivalTime: 1993-05-17 06:44:10 PST Path: arc1-ca.pugleaf.net!gmd.de!ira.uka.de!howland.reston.ans.net!noc.near.net!uunet!mcsun!sun4nl!cwi.nl!huub From: huub@cwi.nl (Huub Bakker) Newsgroups: gnu.epoch.misc Subject: Bug in event-handling using twm. Keywords: window managers, twm, events, bug. Message-ID: <9845@charon.cwi.nl> Date: 17 May 93 13:07:39 GMT Sender: news@cwi.nl Reply-To: Huub.Bakker@cwi.nl Organization: CWI, Centre for Mathematics & Computer Science Lines: 33