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Re: hit testing and retained graphics

From: Steve Faulkner <faulkner.steve@gmail.com>
Date: Sat, 2 Jul 2011 15:06:06 +0100
Message-ID: <CA+ri+VkBycs4AbA=XH5m6d1vqRA4kMs+skD62NkWwi7mZ5oE_w@mail.gmail.com>
To: Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>
Cc: Charles Pritchard <chuck@jumis.com>, Henri Sivonen <hsivonen@iki.fi>, Sean Hayes <Sean.Hayes@microsoft.com>, "E.J. Zufelt" <everett@zufelt.ca>, Paul Bakaus <pbakaus@zynga.com>, "Tab Atkins Jr." <jackalmage@gmail.com>, John Foliot <jfoliot@stanford.edu>, Charles McCathieNevile <chaals@opera.com>, Richard Schwerdtfeger <schwer@us.ibm.com>, Cameron McCormack <cam@mcc.id.au>, Cynthia Shelly <cyns@microsoft.com>, "david.bolter@gmail.com" <david.bolter@gmail.com>, Frank Olivier <Frank.Olivier@microsoft.com>, "Mike@w3.org" <Mike@w3.org>, "public-canvas-api@w3.org" <public-canvas-api@w3.org>, "public-html@w3.org" <public-html@w3.org>, "public-html-a11y@w3.org" <public-html-a11y@w3.org>
hi ben,

I don't see why you would have to duplicate the whole accessibility stack
to provide focus tracking for a screen magnifier, can you explain this a bit


On 2 July 2011 14:32, Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>wrote:

> On Sat, Jul 2, 2011 at 1:30 PM, Steve Faulkner <faulkner.steve@gmail.com>
> wrote:
> > just been looking at canvas based http://demo.ericomaccessnow.com/(requires
> > websockets enabled browser, works fine in chrome)
> >
> > In regards to use with screen magnifcation software, The above product
> does
> > not provide information about current focus, so screen magnifiers cannot
> > track focus, do you think there is a solution for that?
> Would using a remote screen magnifier not work?
> If not, why not?
> How do people using screen magnification with native remote access
> software today?
> It looks like they either a) use remote magnification software:
> http://www.aisquared.com/forums/viewtopic.php?f=7&t=499
> although it looks like there are technical problems with this that
> need to be resolved by AT vendors/remote desktop access software:
> http://www.aisquared.com/forums/viewtopic.php?f=13&t=1141
> https://discussions.apple.com/thread/2034004?start=0&tstart=0
> or, b) they use local magnification software and do without tracking:
> http://www.aisquared.com/forums/viewtopic.php?f=13&t=944
> I don't see why this needs to change when canvas is used for the
> visuals rather than a native graphics API?
> (Specifically, it sounds like less work to fix the technical problems
> I mentioned above than to duplicate the whole work of the
> accessibility stack in some sort of complex conversion from remote
> platform APIs to DOM to local platform accessibility APIs to local
> interface.)
> --
> Benjamin Hawkes-Lewis

with regards

Steve Faulkner
Technical Director - TPG

www.paciellogroup.com | www.HTML5accessibility.com |
HTML5: Techniques for providing useful text alternatives -
Web Accessibility Toolbar - www.paciellogroup.com/resources/wat-ie-about.html
Received on Saturday, 2 July 2011 14:06:55 UTC

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