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Re: aria-valuestep or equivalent needed to make range widgets operable by AT

From: James Craig <jcraig@apple.com>
Date: Thu, 19 May 2016 00:05:21 -0700
Cc: Dominic Mazzoni <dmazzoni@google.com>, ARIA Working Group <public-aria@w3.org>, Alexander Surkov <surkov.alexander@gmail.com>, Alice Boxhall <aboxhall@google.com>
Message-Id: <10B8BCDC-BEB4-4E82-A6C8-86F50E331C66@apple.com>
To: Richard Schwerdtfeger <richschwer@gmail.com>, James Nurthen <james.nurthen@oracle.com>, Bogdan Brinza <bbrinza@microsoft.com>, Cynthia Shelly <cyns@microsoft.com>
Thanks Rich. We'll wait for ARIA.NEXT

To address some of the other questions in this thread:

>>> I checked with Freedom Scientific today and they do not, for any browser or native Windows application announce step information. 

Step is necessary for the UA to know whether a value is valid before setting the value. It's not necessary to announce anything to screen reader. 

Increment/Decrement bypass the need for "step" because they offload the value validation logic to the slider view controller in the application or framework.

>>> Then we would need to convince at least one AT that it is important to provide the information.

No. This is unlikely to ever be exposed to user, it is metadata that is intended to allow custom controls to be "operable" by UA or perhaps AT in the same way that @step is used for native sliders.

James N wrote:

>> Windows phones (Win10/Edge) seem to deal fine with ARIA sliders when running with Narrator.
>> Can we look to see what they are doing in order to enable this without aria-valuestep?

Bogdan and Cynthia, do you know? I don't have a Windows machine. 

My assumption is that it's doing one of the following.
- Intercepting the gesture and simulating arrow keypress events.
- Setting the attribute value directly. (This would not achieve the desired outcome on most ARIA sliders.)

I'd be concerned to standardize either approach. 

James N, if you find Narrator or Edge is doing something else to make ARIA sliders "work" please share.


> On May 18, 2016, at 6:20 AM, Richard Schwerdtfeger <richschwer@gmail.com> wrote:
> 
> I have created the issue: https://www.w3.org/WAI/ARIA/track/issues/1027
> 
> Feel free to add comments/update it. 
> 
> Rich
Received on Thursday, 19 May 2016 07:06:07 UTC

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