- From: <bugzilla@jessica.w3.org>
- Date: Thu, 11 Aug 2011 22:46:39 +0000
- To: public-html-bugzilla@w3.org
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13176 --- Comment #13 from Charles Pritchard <chuck@jumis.com> 2011-08-11 22:46:37 UTC --- (In reply to comment #9) > Wouldn't SVG be the right solution to this? Surely using <canvas> when you are > expecting a user to interact with the app via a tactile interface rather than > through sight is just misusing canvas. One more comment on this, because it occurred to me, that perhaps the WWHATWG editor does not understand accessibility testing. There is no expectation that the user will "interact" via any particular interface, tactile or otherwise. The purpose is to expose information to the operating system / UA, that's all. >From there, we certainly test usability, but that's a separate issue for app developers, not browser vendors. Further, eyes-free use does not necessarily mean that the user, or other observers are not looking or able to look at the screen. Circling back: drawFocusRing is not sufficient for driving screen magnification nor Apple's VoiceOver. It only works for an element that is in focus, and some magnification and touch-based interfaces do not send focus-events until after the user has initiated one. drawFocusRing works for many use cases, and should be used via onfocus events. It's not adequate for the remaining cases which rely on IAccessible accLocation and do not trigger focus. By adding a new method to the canvas api, as we have proposed a setClickableRegion(element), similar to drawFocusRing, the information can be exposed to the OS / UA, and used. I hope that helps. The checkbox example in the WHATWG spec would benefit from setClickableRegion. Currently, it will-not work on VoiceOver in Mobile Safari. It would require only one-line, to fix that, if setClickableRegion were supported. -- Configure bugmail: http://www.w3.org/Bugs/Public/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug.
Received on Thursday, 11 August 2011 22:46:41 UTC