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Re: Plan for reintegration of Hit Regions into Canvas 2D Level 1

From: Mark Sadecki <mark@w3.org>
Date: Thu, 13 Mar 2014 10:15:53 -0400
Message-ID: <5321BD99.1040906@w3.org>
To: Jay Munro <jaymunro@microsoft.com>, "public-canvas-api@w3.org" <public-canvas-api@w3.org>, HTML A11Y TF Public <public-html-a11y@w3.org>
On 3/11/14, 3:20 PM, Jay Munro wrote:
> I was wondering about this line. Is this referring to the cursor dictionary attribute we're not supporting until Level 2, or something connected with the mouseevent? 
> When a user's pointing device cursor is positioned over a canvas element, user agents should render the pointing device cursor according to the cursor specification described by the cursor for the hit region that is the region for the pixel that the pointing device designates on the canvas element's bitmap.
Hi Jay,

This sounds to me like it is referring to custom cursors, which we agreed we would not include in the L1 spec.  I think this can be omitted unless anyone feels differently.


> -----Original Message-----
> From: Mark Sadecki [mailto:mark@w3.org] 
> Sent: Tuesday, March 11, 2014 7:59 AM
> To: public-canvas-api@w3.org; HTML A11Y TF Public
> Cc: Jay Munro
> Subject: Plan for reintegration of Hit Regions into Canvas 2D Level 1
> Hi All,
> Based on discussions from the Canvas Accessibility Sub-Group meeting on Monday 10 MAR 2014 [1], there was consensus that the version of the Hit Regions [2] spec I provided for review last week could be used as a base document for reintegration into the Level 1 spec with the following exceptions and notes:
> * Remove all mentions of and references to fillRule().
> * clearRect() should be the only method for clearing a region.  Adding a region that fully encompasses another region should not remove the encompassed region.  It should remain in case the encompassing region is removed (we should file a bug against WHAT WG regarding this as well).
> * Change all references to the "scratch bitmap" to "the canvas element"
> There was consideration of adding a glossary and/or other non-normative text to introduce parts of the specification that the purpose for may not be immediately obvious.  However, there was concern that the addition of lots of informative text would cause a noticeable deviation from the WHAT WG spec and would not be consistent with other parts of this spec.
> Unless there is disagreement with the above, I propose we move forward with reintegrating Hit Regions [1] back into the Canvas 2D Level 1 spec.  Bugs against the reintegrated text can be filed if additional issues are identified.
> Best,
> Mark
> [1] http://www.w3.org/2014/03/10-html-a11y-minutes.html
> [2] http://lists.w3.org/Archives/Public/public-canvas-api/2014JanMar/att-0165/HitRegionsL1.html

Mark Sadecki
Web Accessibility Engineer
World Wide Web Consortium, Web Accessibility Initiative
Telephone: +1.617.715.4017
Email: mark@w3.org
Web: http://w3.org/People/mark
Received on Thursday, 13 March 2014 14:15:48 UTC

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