- From: Steve Faulkner <faulkner.steve@gmail.com>
- Date: Wed, 4 Apr 2012 13:55:43 +0100
- To: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
- Cc: James Nurthen <james.nurthen@oracle.com>, "Joshue O'Connor" <joshue.oconnor@cfit.ie>, Protocols and Formats Working Group WG <w3c-wai-pf@w3.org>, "w3c-wai-gl@w3.org" <w3c-wai-gl@w3.org>, HTMLAccessibility Task Force <public-html-a11y@w3.org>, John Foliot <john@foliot.ca>, Judy Brewer <jbrewer@w3.org>, Laura Carlson <laura.lee.carlson@gmail.com>
Hi Leif "So it seems that your demo from September 2010 [1] (in which you claimed that IE9 implements the interactive canvas subtree "as per the HTML5 specification") did not include the 'cut and dried' visible focus." I never claimed that focus ring had been implemented only the ability to navigate, interact and access the semantics of content in the subtree. The example provides a demo of a pseudo focus ring that is displayed when the links in the canvas subtree receive focus. "Another thing with that demo is that you set the <canvas> to role=img. Given that role=img means that the screen reader SHOULD see the element as textually empty - including that it it "flattens" interactive elements, that seems questionable, to me." I no longer use role=img for interactive canvas http://www.html5accessibility.com/tests/canvas.html firefox does not map canvas to img as IA2 has a cnavas role. "Btw, I found a demo that takes the opposite approach: Instead of creating a interactive subtree, it places a transparent image map above the canvas, with interactive image map spots above the interactive regions of the canvas. [2] This seems like a useful technique for making canvas accessible." example from 2009 http://www.paciellogroup.com/blog/misc/canvas-pie/pie.html "But I still wonder about aria-describedBY pointing to a invisible region: If activation of describedBY's idref *reveals* - make visible - that region, is there then a problem?" it is not made visible by the additon of the describedby relationship regards stevef On 1 Apr 2012, at 15:00, Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no> wrote: > So it seems that your demo from September 2010 [1] (in which you > claimed that IE9 implements the interactive canvas subtree "as per the > HTML5 specification") did not include the 'cut and dried' visible focus.
Received on Wednesday, 4 April 2012 12:56:33 UTC