[webkit-dev] Proposal: Add support for focus rings in Canvas 2d

[Ryosuke Niwa]

On Thu, Oct 10, 2013 at 7:21 PM, Rik Cabanier <cabanier at gmail.com> wrote:

> On Thu, Oct 10, 2013 at 7:19 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>
>> On Thu, Oct 10, 2013 at 7:14 PM, Rik Cabanier <cabanier at gmail.com> wrote:
>>
>>> On Thu, Oct 10, 2013 at 7:07 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>>>
>>>> The spec. text is also misleading in saying that
>>>>
>>>> The drawSystemFocusRing(element) method, when invoked, must run the
>>>> following steps:
>>>>
>>>> If I understood your reply correctly, these are steps that need to be
>>>> ran continuously?  Or is it that steps 2 & 3 must run upon the currently
>>>> focused element being changed.  The specification needs to revised to
>>>> clarify this.
>>>>
>>>
>>> I think non-normative text or a note could be added to make this more
>>> clear. In general, the function should be called when the focus changes or
>>> the element is relocated and the canvas should be redrawn.
>>>
>> ...
>>
>>>  As is, the specification reads as if the author needs to repaint and
>>>> call drawSystemFocusRing upon focus change.
>>>>
>>>
>>> That is correct and what should happen.
>>>
>>>
>> That seems to contract what you've said earlier:
>>
>>> What is an AT? :-) You don't call drawSystemFocusRing when an element is
>>> focused. You *always* call it and if it is focused, a ring will be drawn.
>>> In all cases, the accessibility software is notified of the area.
>>>
>> (AT stands for http://en.wikipedia.org/wiki/Assistive_technology).
>>
>> Am I correct in saying that the author needs to call this function each
>> and every time an element "inside" the canvas is focused?
>>
>
> No, he needs to ALWAYS call this function wether it's focused or not.
>

I understand that. My point is that the author has to explicitly repaint
the canvas and call drawSystemFocusRing when the focus changed for the
focus ring to be drawn.  i.e. UA can't later decide to draw the focus ring
on its own.

- R. Niwa
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