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RE: Experiments with ARIA Tooltips based on the last APG call

From: Birkir Gunnarsson <birkir.gunnarsson@deque.com>
Date: Wed, 18 Feb 2015 12:51:32 -0500
To: "'Bryan Garaventa'" <bryan.garaventa@ssbbartgroup.com>, <public-pfwg@w3.org>
Message-ID: <028201d04ba3$89aa5ba0$9cff12e0$@deque.com>
Bryan

Excellent work as always, particularly like the Douglas Adams reference.
My brief testing on Jaws and NVDA with IE/FF confirms your findings.
I even set Jaws verbosity to "beginner" and it had no effect on the tooltip
announcement, or lack thereof in IE.
I notice that you resort to using div with aria-label="tooltip" and
role="region" as a container for the actual tooltip container.
This matches with my observations that role="tooltip" is not given any
special treatment by any screen reader I have tested.
3 questions:
1. What is the desireable behavior of screen readers for containers with
role="tooltip"?
Screen readers should announce the word "tooltip" and then its content,
followed by the tooltip content or other accessible name, if provided via
aria-label or aria-labelledby?
That is my thinking at least.

2. Have you tested this on Voiceover, which has a native 7 second delay for
announcing aria-describedby content. Does the built-in delay add to that
time (I think it should, based on the spec)?
Related:
3. I am not sure exactly wat this sentence in the spec means:
"The use of a WAI-ARIA tooltip is a supplement to the normal tooltip
behavior of the user agent"
Is this referring to the title attribute, .. or what is the normal behavior
of tooltips in browsers? I see this is referenced in the meeting minutes, I
may just have to go explore. Unfortunately I missed that meeting on Monday
but will join you for next time.
-Birkir



-----Original Message-----
From: Bryan Garaventa [mailto:bryan.garaventa@ssbbartgroup.com] 
Sent: Wednesday, February 18, 2015 12:32 PM
To: public-pfwg@w3.org
Subject: Experiments with ARIA Tooltips based on the last APG call

I was running some compatibility tests for ARIA Tooltip support based on the
last APG call, and found that it still isn't supported well.

I've updated the Tooltip module for this purpose, at
http://whatsock.com/tsg/Coding%20Arena/Tooltips/Tooltip%20(Internal%20Conten
t)/demo.htm
Which supports focus ability as before, but also a 1.5 second (adjustable)
delay, and Escape as a method for dismissing the tooltip.

The premise being, that a dynamic tooltip container may actually not exist
in the DOM until it is rendered, which is what is happening on this page.
This means that, aria-describedby must be implemented to point to the
role=tooltip container after it is rendered to avoid pointing to a null
reference, this being after 1.5 seconds in this case.

Again, as with live region support, this appears to work perfectly in
Firefox using the leading screen readers JAWS and NVDA, but doesn't work
reliably in IE using either JAWS or NVDA.
Received on Wednesday, 18 February 2015 17:52:04 UTC

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