Re: handling focus

Hi rich,

can you explain how this will work?

for example i have drawn a control on the canvas which corresponds to an
element in the shadow DOM, what is required is a programmatically exposed
focus rectangle that corresponds to the position and dimensions of the
control drawn on the canvas, how is the shadow dom used to acheive this? how
does CSS help to acheive this?

regards
stevef
2009/11/19 Richard Schwerdtfeger <schwer@us.ibm.com>

>  So, I spoke to the mozilla team and with some tweaks (as the shadow dom
> is not visible) the absolute positioning information can be reflected in the
> accessibility API. It will require some browser adjustments but we would do
> this anyway for the shadow DOM. So, there is no need for scripting methods
> to set the position other than through standard CSS functionality.
>
> So, when focus is applied to a shadow DOM element a magnifier can zoom to
> location.
>
> Cynthia,
>
> I am cc'ing you as this needs to go into the HTML 5 accessibility mapping
> document when agreed upon.
>
>
> Rich
>
>
> Rich Schwerdtfeger
> Distinguished Engineer, SWG Accessibility Architect/Strategist
>
> [image: Inactive hide details for James Craig ---11/18/2009 08:27:19
> PM---On Nov 17, 2009, at 2:56 AM, Steven Faulkner wrote:]James Craig
> ---11/18/2009 08:27:19 PM---On Nov 17, 2009, at 2:56 AM, Steven Faulkner
> wrote:
>
>
>      *James Craig <jcraig@apple.com>*
>             Sent by: public-canvas-api-request@w3.org
>
>             11/18/2009 08:26 PM
>
>
> To
>
> Steven Faulkner <faulkner.steve@gmail.com>
> cc
>
> public-canvas-api@w3.org
> Subject
>
> Re: handling focus
>
>  On Nov 17, 2009, at 2:56 AM, Steven Faulkner wrote:
>
> > How do AT such as screen magnifiers provide focus highlighting of
> interactive parts of the canvas if native focus is not provided?
> > How are they able to follow and bring currently focused elements into the
> viewport if there  focus is not programmatically exposed provided?
>
> That's can be done with standard CSS positioning on the interactive
> elements in the shadow DOM. I'll update the proof-of-concept to include that
> use case. I can't promise it before the U.S. Thanksgiving holiday though.
>
> Cheers,
> James
>
>
>
>


-- 
with regards

Steve Faulkner
Technical Director - TPG Europe
Director - Web Accessibility Tools Consortium

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