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RE: SC 2.4.6 (Focus order) and (reverse) tab order

From: David MacDonald <befree@magma.ca>
Date: Mon, 19 Feb 2007 15:20:51 -0500
To: "'Loretta Guarino Reid'" <lorettaguarino@google.com>, "'Christophe Strobbe'" <christophe.strobbe@esat.kuleuven.be>
Cc: "'WCAG'" <w3c-wai-gl@w3.org>
Message-ID: <002001c75463$748c0f60$5da42e20$@ca>

Tabbing backwards is very common for keyboard users. I would say test in
both directions. And add a note intent 

"Note: This includes navigating backwards through the elements which should
also give predictable results."

And test in both directions...

David MacDonald

access empowers people...
        ...barriers disable them...

-----Original Message-----
From: w3c-wai-gl-request@w3.org [mailto:w3c-wai-gl-request@w3.org] On Behalf
Of Loretta Guarino Reid
Sent: Monday, February 19, 2007 3:04 PM
To: Christophe Strobbe
Subject: Re: SC 2.4.6 (Focus order) and (reverse) tab order

This sounds like a case where the web page is being navigated
sequentially, but in the opposite order. Do we need to add a common
failure for checking the opposite order. (Is this really common)? Or
amend the test procedure to test in both directions?


On 2/19/07, Christophe Strobbe <christophe.strobbe@esat.kuleuven.be> wrote:
> Hi,
> During a review of test cases in the BenToWeb test suite for WCAG
> 2.0, the following occurred to me:
> SC 2.4.6 requires that "When a Web unit or authored component is
> navigated sequentially, components receive focus in an order that
> follows relationships and sequences in the content." However, there
> are many types of content that can be tabbed through both in "normal"
> order (usually top to bottom, just pressing the TAB key) and in
> reverse order (pressing SHIFT + TAB). It is possible for scripts to
> manipulate the focus in such a way that certain items are skipped in
> normal tabbing order but not in reverse tabbing order. This would
> fail the intent of SC 2.4.6 but this is not made explicit anywhere.
> An example of this behaviour can be seen at
> When tabbing through this file, focus goes from the first to the
> third link (the second links is skipped because an 'onblur' event on
> the first link changes focus to the third link). When tabbing in
> reverse order, however, you get all the links.
> Best regards,
> Christophe
> --
> Christophe Strobbe
> K.U.Leuven - Departement of Electrical Engineering - Research Group
> on Document Architectures
> Kasteelpark Arenberg 10 - 3001 Leuven-Heverlee - BELGIUM
> tel: +32 16 32 85 51
> http://www.docarch.be/
> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

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