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Re: guideline 7.1 about screen flickering (fwd)

From: Adam Victor Reed <areed2@calstatela.edu>
Date: Wed, 25 Jul 2001 07:36:47 -0700
To: Charles McCathieNevile <charles@w3.org>, w3c-wai-gl@w3.org
Message-ID: <20010725073647.B9191@uranus.calstatela.edu>
My attention deficit is milder than most - and the flash is
distracting enough to prevent me from being able to use ANY
information on that page. Being unable to turn the flashing off
manually is bad bad bad; even if one could, some people with AD
will be too distracted to click on the correct icon within a
reasonable time. My interpretation of "until user agents" is
"until user agents themselves", i.e., after appropriate
customization, the user agent will do it without requiring manual
intervention by the user - who, in the case of a user with AD,
may be unable to attend to it when flashing is already
distracting him.

If there is a mandate to deliver this animation, it should be
converted to a technology that automatic de-animation in existing
browsers is already equipped to handle, e.g. a multiframe GIF with
a *.gif file name and an image/gif content type.
				Adam Reed
Context matters. Seldom does *anything* have only one cause.

On Tue, Jul 24, 2001 at 02:37:35PM -0400, Charles McCathieNevile wrote:
> 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.
> Cheers
> 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:
> http://www.w3.org/TR/WCAG10/wai-pageauth.html#tech-avoid-flicker
> 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
> ---------------------------------------------
> 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 Wednesday, 25 July 2001 10:36:49 UTC

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