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Re: New draft MWABP (17th Sept 09)

From: Bruce Lawson <brucel@opera.com>
Date: Tue, 22 Sep 2009 10:29:01 +0100
To: "Adam Connors" <adamconnors@google.com>, "Mobile Web Best Practices Working Group WG" <public-bpwg@w3.org>
Message-ID: <op.u0njanbth8on37@bruce-pc>
On Mon, 21 Sep 2009 21:41:00 +0100, Adam Connors <adamconnors@google.com>  
wrote:

> New draft uploaded:
>
> http://www.w3.org/2005/MWI/BPWG/Group/Drafts/BestPractices-2.0/ED-mobile-bp2-20090917
>
> Major changes:


> - Added text on Canvas & SVG.


"Canvas is best suited for cases where a static bitmap is sufficient (e.g.  
drawing a scatter-chart, visual effects, reflections etc).

In most cases Canvas is faster and should be preferred if it meets  
requirements."

I think we should explicitly call out that canvas is currently  
inaccessible, as it's just pixels and there is  no DOM for assistive  
technologies to interrogate. It's a moving <img> tag. So it should be used  
for decoration, or supplementing information on the screen, not as the  
sole way of conveying information.

3.5.10.2 How to do it

See http://www.w3schools.com/tags/html5_canvas.asp for information on how  
to use the Canvas tag.

I don't think we should link to w3schools as we shouldn't "bless" one  
single commericial site; the spec for canvas is at  
http://dev.w3.org/html5/spec/Overview.html#the-canvas-element which is  
where I believe we should link to.

> - Added text and reference for ARIA.

Groovy.
Received on Tuesday, 22 September 2009 09:37:42 UTC

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