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RE: Virtual Buffer Refresh

From: Greg Davies <GDavies@jackhenry.com>
Date: Thu, 25 Apr 2013 13:49:33 +0000
To: Bryan Garaventa <bryan.garaventa@whatsock.com>, Jonathan Avila <jon.avila@ssbbartgroup.com>, "w3c-wai-ig@w3.org" <w3c-wai-ig@w3.org>
Message-ID: <003F4D80BD2ADD459453D5115E53F0B10163008E@MMOEX10MBS03.jhacorp.com>
The original content is changed, no problem there and the screen reader can see the content and announces it.  The problem is the screen reader "thinks" the control the content is in is something other than what it actually is.  More specifically, an asp:dropdownlist is the control that initially is changed by the user.  This change triggers a postback to get additional content, but that content is not displayed on the screen only held in the background for a popup window.  The next control on the screen is an asp:textbox.  Its contents has not changed.  When the user tabs to that textbox control, the screen reader announces the control as a combobox, the same control name as the dropdownlist, and does the same for every control on the page regardless of the actual control type.  Executing an ins+esc key combo from the keyboard causes the screen reader to reread the page and everything is fine with the world.  I want to be able to initiate that page reread from the program either using aria commands or javascript.  I have tried various hacks but they do not seem to work reliably.  Aria-live has gotten us to this point.  Without Aria-live, the screen reader announces the control labels just as it does the control, with the same name regardless of the actual label on the control.

Greg Davies

-----Original Message-----
From: Bryan Garaventa [mailto:bryan.garaventa@whatsock.com] 
Sent: Wednesday, April 24, 2013 6:46 PM
To: Greg Davies; Jonathan Avila; w3c-wai-ig@w3.org
Subject: Re: Virtual Buffer Refresh

I'm not sure I understand the problem, is it that the right content isn't being announced, or that the new content isn't appearing in the Virtual Buffer after it's added to the DOM? Both have different fixes. ARIA works on the first, but not the second.

----- Original Message -----
From: "Greg Davies" <GDavies@jackhenry.com>
To: "Jonathan Avila" <jon.avila@ssbbartgroup.com>; <w3c-wai-ig@w3.org>
Sent: Wednesday, April 24, 2013 3:41 PM
Subject: RE: Virtual Buffer Refresh


Unfortunately I have already tried using the role="region" 
aria-live="polite" and even added aria-atomic="true" with only limited 
success.  The issue I am having is once the postback is complete, the screen 
reader announces every subsequent input type as the same type as the control 
that changed originally to effect the postback.  If I do a "hard" refresh of 
the buffer from the keyboard (ins+esc) everything is fine.  I was hoping 
there was some way I could do a hard refresh using javascript or some 
combination of aria tags.

Greg Davies

-----Original Message-----
From: Jonathan Avila [mailto:jon.avila@ssbbartgroup.com]
Sent: Wednesday, April 24, 2013 2:14 PM
To: Greg Davies; w3c-wai-ig@w3.org
Subject: RE: Virtual Buffer Refresh

> Does anyone have a way of refreshing the virtual buffer through either
ARIA tags, or javascript.  I can force a refresh

Use of aria-live regions or certain roles that are implicit live regions 
should work with ARIA supported assistive technologies and browsers.
Freedom Scientific also produced a tech support notice many years ago that 
listed many possible techniques.

Some of the techniques are listed on webAccessibility.com and include 
changing values in hidden input fields, removing and adding nodes in the 
DOM, and changing attributes on elements.

https://www.webaccessibility.com/best_practices.php?best_practice_id=968

Adding and removing nodes in the DOM is likely the best method.

Jonathan

-----Original Message-----
From: Greg Davies [mailto:GDavies@jackhenry.com]
Sent: Wednesday, April 24, 2013 2:56 PM
To: w3c-wai-ig@w3.org
Subject: Virtual Buffer Refresh

Everyone,

Does anyone have a way of refreshing the virtual buffer through either ARIA 
tags, or javascript.  I can force a refresh from the keyboard and that 
clears up the problem  but I have not been able to force a refresh through 
code.  I have tried aria-live but that solution is only partially 
successful.  Thank you in advance.

Greg Davies
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Received on Thursday, 25 April 2013 13:50:05 UTC

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