Hi All--
To add to Everett's comment, I think the key issue here would be if the
disabled UI control provides meaning to a sighted user. For example, if
it has text that provides context to a sighted user, then it should have
sufficient contrast for someone who otherwise wouldn't be able to see
it, i.e., distinguish the foreground from the background. It would also
need alternative text for someone using a screen reader.
Mike
E.J. Zufelt wrote:
Good morning Jonathan,
I would interpret this portion of WCAG as being not in the best
interest of accessibility.
Without justified cause, an inactive (disabled) UI component should
still have perceivable text, for all if there is text that is
perceivable to some.
We do not know the ways in which access to this text, even if the UI
control is disabled, may contribute to the user experience of the
form. If we indeed want the UI control to be imperceivable Then we
can hide it so that nobody uses it to build better context for the UI
of the form.
HTH,
Everett Zufelt
Accessibility Consultant & Web Developer
Web
http://zufelt.ca
Phone (toll free U.S. & Canada)
1-877-ZUFELT-8 (1-877-983-3588)
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On 2010-10-12, at 10:54 AM, Jonathan Hung wrote:
Hi Jan,
Greg and I were having a conversation in the IRC channel about WCAG
compliance and inactive/disabled UI components. According to the WCAG
guideline, it states:
"Text or images of text that are part of an inactive user
interface component, that are pure decoration, that are not
visible to anyone, or that are part of a picture that contains
significant other visual content, have no contrast requirement."
(Reference:
http://www.w3.org/TR/2008/REC-WCAG20-20081211/#visual-audio-contrast-contrast)
In the context of a button that is active and then becomes inactive
when activated (i.e. a Submit button that is enabled until pressed),
how should we interpret this guideline? It seems the *act* of
becoming inactive is significant (this merits contrast?), however,
the guideline states that the contrast requirement doesn't apply to
inactive components. How should we handle contrast styling in this case?
- Jonathan.
---
Jonathan Hung / [email protected] <mailto:[email protected]>
IDRC - Interaction Designer / Researcher
Fax: (416) 977-9844
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