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RE: guideline 7.1 about screen flickering (fwd)

From: Charles McCathieNevile <charles@w3.org>
Date: Tue, 24 Jul 2001 14:37:35 -0400 (EDT)
To: WAI GL <w3c-wai-gl@w3.org>
Message-ID: <Pine.LNX.4.30.0107241435340.4232-100000@tux.w3.org>
I don't think that this image is OK, unless the group feels that the "until
user agents" part of the checkpoint means it is no onger applicable. It moves
at something between 5 and 25 Hz in my viewer, and may preset problems with
concentration or photosensitive epilepsy.

I think that most browsers now allow people to stop the animation, but I do
not think I am in a position to decide that for the group. Could we please
add it to the agenda as a matter of some urgency.


Charles McCN

Charles McCathieNevile    http://www.w3.org/People/Charles  phone: +61 409 134 136
W3C Web Accessibility Initiative     http://www.w3.org/WAI    fax: +1 617 258 5999
Location: 21 Mitchell street FOOTSCRAY Vic 3011, Australia
(or W3C INRIA, Route des Lucioles, BP 93, 06902 Sophia Antipolis Cedex, France)

---------- Forwarded message ----------
Date: Tue, 24 Jul 2001 11:33:13 -0400
From: "Fitzgerald, Jimmie" <Jimmie.Fitzgerald@jbosc.ksc.nasa.gov>
To: 'Terrie King' <tking@ucp.org>, w3c-wai-ig@w3.org
Subject: RE: guideline 7.1 about screen flickering
Resent-Date: Tue, 24 Jul 2001 11:37:35 -0400 (EDT)
Resent-From: w3c-wai-ig@w3.org

Looks fine to me.  It isn't flickering at all.  What 'they' call screen
flicker is more in the lines of image changeouts and color changing.  They
really need to change their wording to 'element flicker' or something.  By
calling it screen flicker, I think monitor refresh rates.  And that is
something we as developers cannot control.

Your .gif is good to go.

Jim Fitzgerald

-----Original Message-----
From: Terrie King [mailto:tking@ucp.org]
Sent: Tuesday, July 24, 2001 10:45 AM
To: w3c-wai-ig@w3.org
Subject: guideline 7.1 about screen flickering

Okay, experts!  I have been asked to put another agency's animated gif on my
Web site.  I am hesitant to  use it because of guideline 7.1--"Until user
agents allow users to control flickering, avoid causing the screen to
flicker."  Here's the link to the checklist item:

How can I determine if the gif in question is within the guidelines?  (gif
attached)  If it is not, I guess I can ask for a non-animated gif.


Terrie L. King
Internet Marketing Manager

UCP National
1660 L Street, NW, Suite 700
Washington, DC  20036
Ph: 800-872-5827
Fax: 202-776-0414
Web site:  http://www.ucp.org
Received on Tuesday, 24 July 2001 14:37:35 UTC

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