- From: Gregg Vanderheiden <gv@trace.wisc.edu>
- Date: Wed, 25 Jul 2001 00:30:44 -0500
- To: "'Charles McCathieNevile'" <charles@w3.org>, "'WAI GL'" <w3c-wai-gl@w3.org>
The guideline doesn’t bar movement between 5 and 50 hZ. It only bars flicker. This image doesn’t flicker on my screen. Does it on anyone elses? It is annoying -- and distracting -- but it doesn’t trigger the epilepsy guideline unless if flashes. Don’t know about distraction - that is another guideline - (doesn’t stop when I turn of images) G -- ------------------------------ Gregg C Vanderheiden Ph.D. Professor - Human Factors Dept of Ind. Engr. - U of Wis. Director - Trace R & D Center Gv@trace.wisc.edu <mailto:Gv@trace.wisc.edu>, <http://trace.wisc.edu/> FAX 608/262-8848 For a list of our listserves send “lists” to listproc@trace.wisc.edu <mailto:listproc@trace.wisc.edu> -----Original Message----- From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On Behalf Of Charles McCathieNevile Sent: Tuesday, July 24, 2001 1:38 PM To: WAI GL Subject: RE: guideline 7.1 about screen flickering (fwd) 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 01:36:37 UTC