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Re: minutes: Canvas sub-group HTML A11y Task Force telecon, 2010-02-15 [draft]

From: Steven Faulkner <faulkner.steve@gmail.com>
Date: Thu, 18 Feb 2010 10:15:51 +0000
Message-ID: <55687cf81002180215t2fdac450i27060b8a11c38eb0@mail.gmail.com>
To: Charles McCathieNevile <chaals@opera.com>
Cc: Richard Schwerdtfeger <schwer@us.ibm.com>, public-canvas-api@w3.org, public-html-a11y@w3.org, david.bolter@gmail.com, jcraig@apple.com, David Singer <singer@apple.com>, janina@rednote.net, cooper@w3.org
Hi Chaals,
>As far as I can tell, by using an image map to represent areas sensitive to
user input, all of these things are automatically managed by the User Agent
in >pretty much every modern user agent (starting with lynx). There is a bug
in some versions of Opera which prevents an imagemap inside the canvas from
being >recognised - this is fixed in current builds of Opera 10.5 and should
remain fixed.

can you explain what you mean by
>There is a bug in some versions of Opera which prevents an imagemap inside
the canvas from being >recognised - this is fixed in current builds of Opera
10.5 >and should remain fixed.

should this work in 10.50 pre-alpha Build 3186?
as in should i be able to tab to and activate the links?

<canvas id="canvas" width="500" height="500">
  <img src="pie.gif" alt="menu"  id="fall" width="501" height="502"
border="0" usemap="#pie">
   </canvas>

<map name="pie">
<area alt="help" shape="poly"
coords="202,203,246,250,246,250,200,298,188,280,181,261,182,235,188,213"
href="file1.html" >
<area alt="files" title="files" shape="poly"
coords="258,239,296,204,278,190,254,183,225,185,204,198,201,201,247,250"
href="file2.html">
<area alt="tools" shape="poly"
coords="249,250,295,298,277,312,247,319,223,317,198,299" href="#"
href="file3.html">
<area alt="other" shape="poly"
coords="298,296,313,273,317,240,308,216,298,206,296,205,251,248" href="#"
href="file4.html">
</map>
regards
steve


On 16 February 2010 01:47, Charles McCathieNevile <chaals@opera.com> wrote:

> On Mon, 15 Feb 2010 23:59:30 +0100, Richard Schwerdtfeger <
> schwer@us.ibm.com> wrote:
>
> ...
>
>> 20:40:11 [richardschwerdtfe]
>> Authors MUST render visible focus of the ADOM subtree element in the
>> canvas area
>> Authors MUST render visible focus of the canvas subtree element in the
>> canvas area
>> Authors MUST render visible focus of the canvas subtree element on the
>> rendered canvas
>>
>
> As far as I can tell, by using an image map to represent areas sensitive to
> user input, all of these things are automatically managed by the User Agent
> in pretty much every modern user agent (starting with lynx). There is a bug
> in some versions of Opera which prevents an imagemap inside the canvas from
> being recognised - this is fixed in current builds of Opera 10.5 and should
> remain fixed.
>
>
> Authors MUST render the keyboard caret insertion cursor of the canvas
>> subtree element on the rendered canvas
>>
>
> I'm not sure about handling this one completely automagically, but the use
> of either forms, or existing editable HTML elements may again provide this
> easily.
>
>  20:42:40 [cyns]
>> authored content SHOULD respond to system settings for font, color and
>> zoom.
>> Authors SHOULD should ensure that the rendered canvas responds to
>> system settings for font, color and zoom
>> Authors SHOULD should ensure that the rendered canvas responds to
>> system settings for font, color and zoom
>> Authors SHOULD should ensure that the rendered canvas responds to
>> system settings for font, color and zoom
>> 20:46:06 [richardschwerdtfe]
>> Define user settings as system, user agent, or web application settings
>>
>
> This stuff is trickier. We need to describe how the author would find out
> what those settings are if they are using canvas (although I also need to
> read up on the canvas text API to make sure I'm not missing something
> basic).
>
>
> cheers
>
> Chaals
>
> --
> Charles McCathieNevile  Opera Software, Standards Group
>    je parle franšais -- hablo espa˝ol -- jeg lŠrer norsk
> http://my.opera.com/chaals       Try Opera: http://www.opera.com
>
>


-- 
with regards

Steve Faulkner
Technical Director - TPG Europe
Director - Web Accessibility Tools Consortium

www.paciellogroup.com | www.wat-c.org
Web Accessibility Toolbar -
http://www.paciellogroup.com/resources/wat-ie-about.html
Received on Thursday, 18 February 2010 10:16:47 GMT

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