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Re: flickering / animations

From: Charles McCathieNevile <charles@w3.org>
Date: Sun, 23 Jan 2000 11:55:54 -0500 (EST)
To: WAI GL <w3c-wai-gl@w3.org>
cc: Emmanuelle Gutiérrez y Restrepo <emmanuelle@retemail.es>
Message-ID: <Pine.LNX.4.20.0001231151290.7869-100000@tux.w3.org>
Emmanuelle's response forwarded with permission.

Anyone have a good way to move fowards? Possibilities seem to include:

asking the Protocols and Formats group to look at the issue in regards to
XHTML, changing our approach to validity, producing a DTD that includes
features we are missing, but are supported by browsers, sticking to our
recommendation and not worryinbg about it...

CHarles

On Thu, 13 Jan 2000, Coordinación del SIDAR wrote:

  Dear Charles:

  Thank you for the copy of this message.

  I find the recommendation of not using animations not very realistic, the
  fact is that the webmaster loves to use animations, so if we seek that
they
  follow the rules of accessibility it is necessary to offer them an
  alternative.

  The problem with TIFLOWIN persists because it is a very cheap program, so,
  although many blind men and people with visual deficiencies JAWS uses,
many
  others continue using TIFLOWIN because it is a program in Spanish and
  because it is within reach of its economy. At this time the JAWS is
  translating to Spanish and I know that the ONCE (National Organization of
  Blind of Spain) it will reach an agreement to distribute this program to
its
  members. Then, when the people stops to be used the TIFLOWIN definitively
  there will no longer be problems with the animations, but at the moment it
  is necessary to offer a solution, although this thwarts the
recommendations
  of the WAI.

  But also, because TIFLOWIN hangs the computer when he/she finds something
  that moves in the screen, this affects to the use of menus or any other
  element that moves in the screen, or when CSS is used and it is used
  A:hover. That makes indispensable to only offer a version text of the
pages.
  For it, although I am not in favor of the specific versions for a certain
  community, it has been necessary to enable a version text of the pages of
  the SIDAR.

  Thank you for your interest.

  Greetings,

  Emmanuelle Gutiérrez y Restrepo
   Coordinator of the SIDAR

  ----- Original Message -----
  From: Charles McCathieNevile <charles@w3.org>
  To: WAI GL <w3c-wai-gl@w3.org>
  Cc: Emmanuelle Gutiérrez y Restrepo <emmanuelle@retemail.es>
  Sent: Wednesday, January 12, 2000 3:19 PM
  Subject: flickering / animations


  > I have been looking over various sets of guidelines recently, to see
what
  > other people are saying.
  >
  > A particular point is with animation. We recommed not using them until
  they
  > can b turned off, and the browser support page notes that it is possible
  to
  > turn off images. It is also possible in Netscape 4.61 (Linux) to stop
  > animations (press the ESC key, or right click on the page for a menu
that
  > offers it as an option. This feture is not available in Netscape 4.5 for
  > win95. Amaya does not support animated gifs. There is an applet which
  creates
  > a wobbly reflection of an image - there is an example of it at
  > http://www.wendyrule.com - but if you click on the applet it stops
moving
  > (and click again to start it). I believe this is open source (I once
ased
  the
  > page designer) and if so I will look for the source for the techniques
  > document.
  >
  > At http://www.sidar.org/anima.htm there is a suggestion to use the
LOWSRC
  > attribute for an img to point to a non-moving version. (This was to get
  > around a technical problem with a Screenreader). lowsrc isn't part of
the
  > HTML spec, but it may be innteresting to ask WAI-PF to look at this
  approach
  > as part of the work on XHTML 1.1. If you don't read spanish the babelfis
h
  > translation more or less makes sense - go to
  http://babelfish.altavista.com
  > and you can supply the other URI for translating.
  >
  > Does anyone have other test cases? What do screen readers do when there
is
  a
  > scrolling message in the status bar - does anyone know?
  >
  > Cheers
  >
  > Charles McCN
  >
  >
  >
  > --
  > Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409
134
  136
  > W3C Web Accessibility Initiative
  http://www.w3.org/WAI
  > 21 Mitchell Street, Footscray, VIC 3011,  Australia
  >


--
Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134
136
W3C Web Accessibility Initiative                      http://www.w3.org/WAI
21 Mitchell Street, Footscray, VIC 3011,  Australia
Received on Sunday, 23 January 2000 11:55:56 GMT

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