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Re: canvas API changes to drive magnification

From: David Bolter <david.bolter@gmail.com>
Date: Tue, 09 Mar 2010 09:34:12 -0500
Message-ID: <4B965C64.5000807@gmail.com>
To: Richard Schwerdtfeger <schwer@us.ibm.com>
CC: cooper@w3.org, janina@rednote.net, Charles McCathieNevile <chaals@opera.com>, cyns@exchange.microsoft.com, Steven Faulkner <faulkner.steve@gmail.com>, Frank Olivier <franko@microsoft.com>, jcraig@apple.com, "public-canvas-api@w3.org" <public-canvas-api@w3.org>
Hi Rich, all,

I just read the proposal at 
http://www.w3.org/html/wg/wiki/ChangeProposals/canvasaccessibility

I don't feel like I fully understand the proposal. Take the case for 
canvas drawn text. Each time the user presses the right arrow, does the 
author catch that event and call e.g. drawFocusRing(myTextBox, 10, 5, 
true, true)?

I want to understand who is responsible for drawing the caret or focus 
ring in various examples.

http://www.paciellogroup.com/blog/misc/canvas/2dcontext-caret.html is 
really hard to understand (maybe because of typos). For example I don't 
understand how to parse this sentence: " If the given element is focused 
or is a descendant of the focus element, and isCaret is true, 
canDrawCustom argument is true draws a caret following the platform 
conventions for carets." -- Who draws?

cheers,
David

On 08/03/10 7:17 PM, Richard Schwerdtfeger wrote:
>
> I would like to have people review Steve and my proposal to the canvas
> accessibility API to address focus and caret tracking for the next canvas
> meeting on the 15th so that we can take this to the task force for
> approval. David, Frank, Cynthia, James, and Charles I would very much like
> your feedback by the next call.
>
> http://www.w3.org/html/wg/wiki/ChangeProposals/canvasaccessibility
>
> Thanks,
> Rich
>
> Rich Schwerdtfeger
> Distinguished Engineer, SWG Accessibility Architect/Strategist
>    
Received on Tuesday, 9 March 2010 14:35:07 UTC

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