- From: Charles McCathieNevile <charles@w3.org>
- Date: Tue, 24 Jul 2001 14:42:46 -0400 (EDT)
- To: "Fitzgerald, Jimmie" <Jimmie.Fitzgerald@jbosc.ksc.nasa.gov>
- cc: "'Terrie King'" <tking@ucp.org>, <w3c-wai-ig@w3.org>
I am not so sure. The thing moves in my viewer at the sort of rate that is potentially a problem (between 5 and 50 hertz, roughly) for people with photosensitive epilepsy, and is distracting for people with concentration difficulties. I think if it is going to be fine it will be so on the basis that it is easy to stop animations in modern browsers, and I am not sure if the WCAG group has actually worked out whether or not that is the case in the real world to the extent that they are now happy about it. I will follow up in that group - the archive is public so you can read along from http://lists.w3.org/Archives/Public/w3c-wai-gl/2001JulSep/0123 and people are able to subscribe to that group if they want to join the discussion. Cheers Charles McCN On Tue, 24 Jul 2001, Fitzgerald, Jimmie wrote: 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 -- 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)
Received on Tuesday, 24 July 2001 14:43:08 UTC