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Re: PFWG comments on Touch Events, 24 Jan 2013 version

From: Arthur Barstow <art.barstow@nokia.com>
Date: Thu, 28 Feb 2013 16:39:15 -0500
Message-ID: <512FCE83.2030207@nokia.com>
To: ext Michael Cooper <cooper@w3.org>
CC: WAI Liaison <wai-liaison@w3.org>, public-webevents@w3.org
On 2/28/13 4:32 PM, ext Michael Cooper wrote:
> Hi Art - it's hard to get a response back from the PFWG this week 
> because the majority of our participants are at an accessibility 
> conference. I think your proposed text looks good, but am not sure 
> what URI we would prefer for the resource. Probably we would either 
> want something in the PF wiki, i.e., some page under 
> http://www.w3.org/WAI/PF/wiki/, or some static page somewhere, maybe 
> in datespace, maybe not. I'd like to run that part of the question 
> past the group.
> I expect to be able to discuss this with the PFWG next week. Will it 
> work for you to proceed on the basis of the PFWG general acceptance, 
> and get the final URI to you mid next week to stick in the document? 
> If that still holds you back, I'll make an executive decision and just 
> suggest one.

Yes, that all sounds reasonable to me. Thanks for your quick reply.


> Michael
> Arthur Barstow wrote:
>> Hi Michael, PFWG,
>> We now have sufficient implementations for this spec to advance to 
>> Proposed Recommendation [ImplReport]. As such, to prevent your 
>> comment from blocking our PR, we would like to get closure on your 
>> comment as soon as possible (our LC comment tracking document is 
>> [LC-Comments]).
>> I propose adding the following text as the last paragraph in section 
>> 1 of the spec:
>> [[
>> The Protocols and Formats Working Group created a non-normative 
>> document that includes a mapping of hardware events (e.g. keyboard 
>> events) to touch events. For more information see [@TBD].
>> ]]
>> Please feel free to supply your own text rather than the above.
>> We can use something in WebEvents' URL space (e.g. 
>> <http://www.w3.org/2010/webevents/wiki/Mapping>) as the URL for the 
>> reference or we will use whatever URL you give us.
>> When can we expect you to either accept our text or for you to supply 
>> your text?
>> -Thanks, ArtB
>> [ImplReport] <http://www.w3.org/2010/webevents/wiki/TEv1ImplReport>
>> [LC-Comments] 
>> <http://www.w3.org/2010/webevents/wiki/TouchEvents-LCWD-24-Jan-2013>
>> On 2/15/13 9:15 AM, ext Arthur Barstow wrote:
>>> Hi Michael,
>>> Given the information you want to add is non-normative, I prefer 
>>> your suggestion the Web Events spec include a link to this 
>>> additional information, especially since that will facilitate the 
>>> evolution of the information (without having to change the Web 
>>> Events spec).
>>> How about I can create a wiki document under WebEvents' wiki <>? If 
>>> you don't like that idea, then we can use whatever you prefer.
>>> Also, can you please give us a rough estimate on when you expect to 
>>> have information available?
>>> (After we see your information, we can work together to determine 
>>> how the Web Events should link to it e.g. which section.)
>>> -Thanks, Art
>>> On 2/13/13 12:17 PM, ext Michael Cooper wrote:
>>>> The Protocols and Formats Working Group has reviewed Touch Events 
>>>> 1.0 Working Draft of 24 January 2013 
>>>> http://www.w3.org/TR/2013/WD-touch-events-20130124/ for 
>>>> accessibility issues. The finding of the group is that the events 
>>>> don't inherently impact accessibility in any particular way, but 
>>>> they do define a certain class of input events (touch) that not all 
>>>> users may be able to use. We do not think it is in scope of the Web 
>>>> Events Working Group to address this directly. However, we would 
>>>> like to request that informative content be added to alert 
>>>> implementers and suggest actions they may take. In this comment we 
>>>> outline the general structure of this content; if you accept the 
>>>> proposal in principle, we can work with you on a reasonable 
>>>> timeline to prepare the specific content. We are sending it in this 
>>>> manner in order to make sure to log the comment by the due date, 
>>>> which would not be possible if we take time to develop the complete 
>>>> proposal first.
>>>> The issue of events of one type not being available for all users 
>>>> is already widespread with mouse events. For many years now, user 
>>>> agents have provided a workaround of sorts. Applications listen for 
>>>> the "click" event in order to actuate the user interface. As long 
>>>> as the control is focusable, keyboard users can navigate to the 
>>>> control and press the Enter key. The user agent actually generates 
>>>> a click event in response to this key action, so the web 
>>>> application requires no special coding to handle keyboard users, 
>>>> and accessibility of the application is maintained.
>>>> The PFWG believes this type of solution could be applied to Touch 
>>>> events as well. The proposal is to provide a table that maps other 
>>>> hardware events (particularly keyboard events, but possibly others) 
>>>> to Touch events. User agents that implement this mapping would fire 
>>>> the appropriate Touch event whenever the other hardware event was 
>>>> received. This would provide transparent accessibility support for 
>>>> web applications.
>>>> The proposal is that this be *informative* content only, perhaps in 
>>>> an appendix or other location of your choice. User agents would not 
>>>> be required to implement this mapping, and the timeline of 
>>>> progression to Recommendation should not be affected. The 
>>>> accessibility community would separately advocate with user agent 
>>>> developers that these mappings be implemented.
>>>> The specific mapping suggestions require further exploration. Not 
>>>> all Touch events would have a corollary on other input types. But 
>>>> it should be possible to come up with a small set of mappings that 
>>>> allows the majority of applications that use Touch Events to be 
>>>> accessible without special coding.
>>>> For the PFWG,
>>>> Michael Cooper
>>>> -- 
>>>> Michael Cooper
>>>> Web Accessibility Specialist
>>>> World Wide Web Consortium, Web Accessibility Initiative
>>>> E-mail cooper@w3.org <mailto:cooper@w3.org>
>>>> Information Page <http://www.w3.org/People/cooper/>
> -- 
> Michael Cooper
> Web Accessibility Specialist
> World Wide Web Consortium, Web Accessibility Initiative
> E-mail cooper@w3.org <mailto:cooper@w3.org>
> Information Page <http://www.w3.org/People/cooper/>
Received on Thursday, 28 February 2013 21:39:45 UTC

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