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Re: Html5 canvas accessibility

for

From: paniz alipour
Date: Mar 25, 2011 10:27AM


Hi,

Is any paper in any conference or journal published in this scope(Canvas
accessibility) ?

Regards

On Fri, Mar 25, 2011 at 2:57 PM, Steve Faulkner < <EMAIL REMOVED> >wrote:

> hi Paniz.
>
> the content of the canvas cannot itself be made accessible, it is
> merely pixels, what is drawn on the screen has no inherent meaning or
> semantics that can be convyed to assitive technology. What is required
> is that an alternative is supplied using HTML.
> The effect of the IE implementation is that
> The HTML alternative can be provided by placing content inside the
> <canvas> tags rather than elsewhere on the page. Interaction with HTML
> content inside the canvas tags can be hooked up with what is drawn on
> the canvas using Javascript.
>
> There are pieces missing that are required to make the interaction
> between html content inside the canvas tags and what is drawm on the
> screen. These pieces are still being developed and specified.
>
> these include:
> a method to draw a focus ring on the canvas to indicate an area of the
> canvas has focus and that focus ring is associated with a html element
> such as a link or control inside the canvas tags.
> a method to indicate a caret
>
> the links josh provided go into more detail about these.
>
> regards
> stevef
>
> On 25 March 2011 09:43, paniz alipour < <EMAIL REMOVED> > wrote:
> > Hi joshue,
> >
> > By this sentence:
> > "So should you now built stuff that you want to be accessible in
> <canvas>?
> > Nope."
> > you mean as a developer,or no as a person who wants to try making canvas
> > accessible?
> >
> > How can I access the works that has been done on this area?
> >
> > And I have a question about IE9,whether it's problem really has been
> solved?
> >
> > Maybe in fact the canvas accessibility is not completely clear for me,
> >
> > I will be thankful if any body explain it's problem in a sentence,because
> I
> > dizzy,in some blog post for 2009 I read that the problem is about
> fallback
> > content,that it seems by release of IE9 it has been solved:(
> >
> > So....?!
> >
> > Thanks because of your guidance
> >
> >
> >
> > On Fri, Mar 25, 2011 at 1:38 PM, Joshue O Connor < <EMAIL REMOVED>
> >wrote:
> >
> >> Hi Paniz,
> >>
> >> > I am researching about html5 canvas accessibility ,I want to know more
> >> > information about it.
> >> >
> >> > Any body knows what's the status of canvas accessibility?
> >>
> >> Please have a look at the following for more info [1].
> >>
> >> If you wish to follow the issue (as it happens as such) have a look at
> >> the minutes of <canvas> meetings. [2]
> >>
> >> If that's too much, a doc that outlines some of the a11y issues with
> >> <canvas> may help to explain things. [3]
> >>
> >> This is really an issue in flux. It is nowhere near resolved (IMO).
> >> There have been some interesting development such as IE 9 claiming
> >> support for the canvas a11y, basically a navigable sub DOM that supports
> >> fallback content nested inside the <canvas> element.
> >>
> >> So in short, is <canvas> accessible? Not yet. Is there work being done
> >> on this? Yes.
> >>
> >> So should you now built stuff that you want to be accessible in
> >> <canvas>? Nope.
> >>
> >> HTH
> >>
> >> Josh
> >>
> >> [1]
> >>
> >>
> http://www.paciellogroup.com/blog/2010/09/html5-canvas-accessibility-in-internet-explorer-9/
> >> [2] http://www.w3.org/WAI/PF/HTML/wiki/Canvas/Meetings/Minutes
> >> [3] http://www.w3.org/html/wg/wiki/AddedElementCanvas
> >>
> >>
> >>
> >>
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> >
> >
> > --
> > Paniz Alipour
> >