- From: Mark Sadecki <mark@w3.org>
- Date: Tue, 14 Jan 2014 10:30:07 -0500
- To: HTML A11Y TF Public <public-html-a11y@w3.org>, public-canvas-api@w3.org
Hello,
The minutes for the Canvas Accessibility Sub Group Teleconference 13 January 2014 are available in HTML and plain text below. Supporting information for this Sub Group can be found on the wiki: http://www.w3.org/WAI/PF/HTML/wiki/Canvas
HTML: http://www.w3.org/2014/01/13-html-a11y-minutes.html
TEXT:
[1]W3C
[1] http://www.w3.org/
Canvas Accessibility Sub-Group Teleconference
13 Jan 2014
See also: [2]IRC log
[2] http://www.w3.org/2014/01/13-html-a11y-irc
Attendees
Present
Rich Schwerdtfeger, Mark Sadecki, Jatinder, Rik
Cabanier, Philippe, Paul Cotton
Regrets
Chair
Mark Sadecki
Scribe
Mark Sadecki
Contents
* [3]Topics
1. [4]Review Action items taken up at last meeting
2. [5]Revisit Bug 23980 RE: Naming of focusRing methods
http://j.mp/L3I6tf
3. [6]Continue Bug Walkthrough (next up: 23984-23987)
4. [7]Publication path/timeline for Canvas (from PaulC)
http://j.mp/KfCUkH
5. [8]Next Meeting
* [9]Summary of Action Items
__________________________________________________________
<trackbot> Date: 13 January 2014
<scribe> scribe: MarkS
[10]http://www.w3.org/WAI/PF/HTML/wiki/Summary_of_focusRing_met
hod_naming#Summary
[10] http://www.w3.org/WAI/PF/HTML/wiki/Summary_of_focusRing_method_naming#Summary
Review Action items taken up at last meeting
MS: I will follow up with Jay Munro regarding the two action
items on him for last week.
Revisit Bug 23980 RE: Naming of focusRing methods
[11]http://j.mp/L3I6tf
[11] http://j.mp/L3I6tf
->
[12]http://www.w3.org/WAI/PF/HTML/wiki/Summary_of_focusRing_met
hod_naming#Summary Summary
[12] http://www.w3.org/WAI/PF/HTML/wiki/Summary_of_focusRing_method_naming#Summary
MS: drawFocusIfNeeded seems to be a favorite at this point.
JMann: I am OK with that
RS: : I am OK with that
JMann: drawFocusIfNeeded seems to solve all the issues I
originally raised.
... talked about splitting the methods?
RS: Ian originally wanted to have both together to make it
easier on developers. I still think that is a good idea.
RC: If we change the name and clarify purpose in spec, there
should be no reason to split them up
JMann: seems like if you are using the 2D context, this is the
way to do it. Spoke with Graphic designers that understand this
concept
RESOLUTION: to change drawSystemFocusRing to drawFocusIfNeeded
Continue Bug Walkthrough (next up: 23984-23987)
<plh>
[13]https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&b
ug_status=ASSIGNED&bug_status=REOPENED&component=CR%20HTML%20Ca
nvas%202D%20Context&list_id=30985&order=Importance&product=HTML
%20WG&query_format=advanced
[13] https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=CR%20HTML%20Canvas%202D%20Context&list_id=30985&order=Importance&product=HTML%20WG&query_format=advanced
-> [14]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23984
23984 Is it possible to implement drawCustomFocusRing? (JM.
Moved to Level 2)
[14] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23984
-> [15]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23985
23985 drawCustomFocusRing and color scheme (JM. Moved to Level
2)
[15] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23985
-> [16]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23986
23986 Current default path
[16] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23986
-> [17]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23987
23987 Empty path and drawSystemFocusRing
[17] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23987
PLH: some of these are still assigned to CR component
RS: 23984 should not be in the list because it is being moved
to L2
... 23985 same thing
JMann: 23986, which path actually gets drawn?
PLH: I think you are talking about 23987
JMann: if you call it immediately, what happens?
RC: depends on what you have done previously
PLH: Assuming you have not done anything
RC: whatever path is in the canvas at that point, will be the
focus area
PLH: The spec states that there is always a current default
path, what is it?
<richardschwerdtfeger>
[18]http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/
#current-default-path
[18] http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/#current-default-path
JMann: scenario 1, just created canvas, call drawFocusIfNeeded,
what happens, and just drew a path and called drawFocusIfNeeded
what happens
PLH: I will amend the bug
JMann: what do we think should happen?
PLH: I don't think anything should happen, there is no default
path when the canvas element has been created
JMann: if you call drawFocusIfNeeded before than you have a
region associated with that path
RS: can always have the path be outside the canvas area,
nothing gets drawn
... it should have a default path of some sort
RC: by default a fallback element has not region associated
with it.
JMann: I think it should get the bounds of the entire canvas
element
RS: Makes sense
RC: that is not in the spec right now right?
RS: no, should be
RC: should that be in the HTML spec? That is where we talk
about fallback content
RS: What does context.fill do ?
nothing
RC: if you bring focus to fallback content, but the associated
path has not even been drawn, nothing should happen
JMann: agree
... so if I do the beginPath forces UA to cache the last path
always.
<richardschwerdtfeger> For CanvasRenderingContext2D objects,
the points and lines added to current default path by these
methods must be transformed according to the current
transformation matrix before they are added to the path.
RS: 0,0 is path, doesn't go anywhere?
JMann: i think we should just change algorithm to abort
RC: you need to update the region
RS: If you are adding to the path, then yes
RC: updated a11y api with the bounding box of the element
RS: we could put a note that says to make sure that you have
created a path
RC: there is always a path
<JatinderMann> The beginPath() method must empty the list of
subpaths in the context's current path so that the it once
again has zero subpaths.
JMann: the moment you call beginPath, you have no path until
you build on that path . it's empty
... so we draw the bounding of the canvas, or draw the last
path, or we draw 0,0 or we ??
RC: If the current default path is empty, then don't draw
anything but set the accessible region back to the original
value
JMann: do we all agree that it is an error case?
RC: I think it something an author might do
... a way to remove the association with the fallback content
JMann: ah to reset a11y dom
... that is a use case
... means we shouldn't do nothing
... so 0,0 or the entire canvas. I like entire canvas, which is
still true, but it may not be a real reset.
RC: can we say initial value?
RS: if its the entire canvas the magnifier focuses on entire
canvas
JMann: is there a default location?
RS: not that I am aware of
RC: can you make it invisible?
RS: yes
JMann: If we can tie it to the initial value (invisible) then
that should cover the use case.
JMann: does this feel buggy or will developers get this concept
... this should also resolve 23987
<richardschwerdtfeger>
[19]https://developer.mozilla.org/en-US/docs/Web/Accessibility/
AT-APIs/MSAA/States
[19] https://developer.mozilla.org/en-US/docs/Web/Accessibility/AT-APIs/MSAA/States
RS: states are different on each platform. MSAA has the concept
of unavailable
<JatinderMann> STATE_SYSTEM_INVISIBLE
RS: offscreen means not visible, but not necessarily gone.
... that means disabled, so that wouldn't work
... if the author really wants to remove it from the AT they
should just remove it from the AAPI
JMann: are we expected developers to delete the element and add
it back later on?
... the recommend approach for removing your controls would be
to change the ARIA state or delete the node. Maybe we should
just a no op if the path is empty
RS: so do nothing?
yes
JMann: should be as easy as updating the processing model
RESOLUTION: Update the process to include "if there are zero
sub paths in the current path, abort these steps"
RS: we can close 23986 and 23987 when this is done.
<plh> [20]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23982
[20] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23982
PLH: 23982 focus ring out of canvas is that one closed?
JMann: I don't think the bug reflects that, but we need to get
the spec updated and then update the bug
<richardschwerdtfeger> It was agreed that the focus ring would
be clipped to the bounds of the canvas area but that the
location of the corresponding fallback element would not be
clipped and would match the current default path passed.
Publication path/timeline for Canvas (from PaulC)
[21]http://j.mp/KfCUkH
[21] http://j.mp/KfCUkH
<plh> [22]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23981
[22] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23981
<paulc> Canvas CR bugs: [23]http://tinyurl.com/kxmqysj
[23] http://tinyurl.com/kxmqysj
JMann: I'll have Jay close the bugs as soon as the spec is
updated
<richardschwerdtfeger> "Informs the user of the canvas location
for the fallback element, based on the current path. If the
given element has focus, draws a focus ring around the current
path following the platform or user agent conventions for focus
rings as defined by the user agent."
PC: When will all the changes to the spec be made, and when
will the bugs will be closed.
... next week we should have an agenda item to confirm these
bugs are closed
RS: I can confirm that 23978 has been completed
JMann: scrollPathIntoView has been moved to L2 because it
requires Path
<plh3> " the bounding box of the area to which the user agent
is scrolling as the bounding box of the current selection."
<JatinderMann>
[24]https://www.w3.org/Bugs/Public/show_bug.cgi?id=23983
[24] https://www.w3.org/Bugs/Public/show_bug.cgi?id=23983
<Zakim> plh, you wanted to ask about a potential new issue
<plh3>
[25]http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/
#dom-context-2d-drawsystemfocusring
[25] http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/#dom-context-2d-drawsystemfocusring
<richardschwerdtfeger>
[26]http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/
#dom-context-2d-drawsystemfocusring
[26] http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/#dom-context-2d-drawsystemfocusring
PLH: If i have two checkbox in my canvas and two canvas
elements to match, and I call drawFocusIfNeeded. Now, I move
focus to the second element, second checkbox and I all
drawFocusIfNeeded. I am assuming it does not remove the focus
once focus is removed it is up to the author to remove the
focus ring
yes
RS: also when author calls .focus
JMann: is dominic in agreement with all of our changes?
RS: I think we should send him an updated draft
JMann: I will follow up with Jay to get all changes implemented
so we have a new draft.
PC: I talked to W3C Team and as long as we are removing
material to canvas and not adding substantive new material, we
can waive the disclosure period, so that is no longer a factor.
PLH: we have two problems. We have added some text to this
spec. Also, with changing the name of the method...
PC: PLH can you add this to the discussion with Ian Jacobs?
PLH: OK
PC: doesn't look like we will have much of a delay going into
LC. If we go back into CR what the min time will be. If another
disclosure is required, the min length would match the 6 week
period anyway, so we should be OK.
... main thing is that we need to get this into LC ASAP
RS: when we get this draft, there is an apple guy that needs to
look at it as well.
RC: I think we have addressed his concerns as well. He may need
to be convinced.
JMann: will be worth it to share our changes and reasoning with
him.
RC: I'll email him.
JMann: how long to get changes in?
RC: Should be a small patch, the AAPI stuff might take a few
weeks.
PLH: Need dominic to update implementation in Blink
JMann: we also need test suites as well
PLH: I have some tests, but nothing that looks at the AAPI
<plh3> [27]https://github.com/w3c/web-platform-tests/pull/457
[27] https://github.com/w3c/web-platform-tests/pull/457
PC: During this week, if the canvas editors are closing out
bugs, they should be prepping LC document as well
<plh3> ACTION: plh to update his tests in
[28]https://github.com/w3c/web-platform-tests/pull/457
[recorded in
[29]http://www.w3.org/2014/01/13-html-a11y-minutes.html#action0
1]
[28] https://github.com/w3c/web-platform-tests/pull/457
<trackbot> Created ACTION-225 - Update his tests in
[30]https://github.com/w3c/web-platform-tests/pull/457 [on
Philippe Le Hégaret - due 2014-01-21].
[30] https://github.com/w3c/web-platform-tests/pull/457
PC: we have to do a CfC, earlier the better
... probably what we would do is have a heartbeat for L2 as
well
... we will be doing heartbeats in early Feb
Next Meeting
MS: same time, same place next week
Summary of Action Items
[NEW] ACTION: plh to update his tests in
https://github.com/w3c/web-platform-tests/pull/457 [recorded in
[31]http://www.w3.org/2014/01/13-html-a11y-minutes.html#action0
1]
[End of minutes]
__________________________________________________________
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Received on Tuesday, 14 January 2014 15:30:06 UTC