Re: Keyboard Navigation For Document Exploration In SVG 1.2

Jon,  While this is true, and to some extent, if yu consider keyboard 
follows focus and a person is only viewing a small ortion of a diagram, I 
think for most people, unless the diagram is huge or their screen is really 
tiny, they will be able to get the information we require exploration for at 
a glance.  It though is certainly helpfull and may be necessary in some 
instances for this kind of fine controll over focus to be available in ways 
I haven't thought of.  I can think for instance that a scanning switch might 
benefit from such an interface or a joystic approach might also benefit.

Johnnie Apple Seed

----- Original Message ----- 
From: "Jon Gunderson" <>
To: "david poehlman" <>; "Lisa 
Seeman" <>; <>; "Will Pearson" 
Cc: <>
Sent: Tuesday, November 23, 2004 9:49 AM
Subject: Re: Keyboard Navigation For Document Exploration In SVG 1.2

Directional navigation is not only for the visually impaired.
 many people with physical disabilities who cannot use the
mouse benefit from directinoal navigation.


---- Original message ----
>Date: Tue, 23 Nov 2004 08:16:37 -0500
>From: "david poehlman"
>Subject: Re: Keyboard Navigation For Document Exploration In
SVG 1.2
>To: "Lisa Seeman" <>, <>,
"Will Pearson" <>
>Cc: <>
>It is possible with anything to get lost, but it is also
quite possible for
>people who have a good memory of spatial things such as
myself and possibly
>will and many others that this would be a usefull tool.  AS
to where it fits
>in the scheeme of things with respect to ua, at or svg spec
is something to
>be hashed out but keyboard exploration of diagrams needs to
be enabled for
>without it, we are lost.
>It would be interesting to hear Gregory's thoughts, I do
think though that
>there is a good deal of research behind the possibilities of
this working
>Johnnie Apple Seed
>----- Original Message ----- 
>From: "Lisa Seeman" <>
>To: <>; "Will Pearson"
>Cc: <>
>Sent: Tuesday, November 23, 2004 1:51 AM
>Subject: Re: Keyboard Navigation For Document Exploration In
SVG 1.2
>My concern is that you would get terribly lost.
>But is anyone thinks this might be useful, and could do it ,
 it would be
>Gregory Rosmaiter. So I am cc'ing him.
>I will also try and ask him.
>Keep well
>  ----- Original Message ----- 
>  From: Will Pearson
>  To:
>  Sent: Monday, November 22, 2004 10:38 PM
>  Subject: Keyboard Navigation For Document Exploration In
SVG 1.2
>  Hi;
>  At the moment there's no clear indication within the spec
that document
>exploration should be made available through a ua's keyboard
>Whilst most people will be able to visually explore the
image, this won't be
>possible for some users, and may not be possible for others.
 Therefore, I
>would like to suggest that some form of navigation between
>elements and graphic elements be recommended as a guideline
for ua
>developers.  This should facilitate exploration of the
document away from
>any elements with 'focusable' set to true, or active elements
>'focusable' set to auto.
>  Ideally, this would be based on spatial direction, thus
allowing the user
>to build up a mental model of the spatial relationships
between elements.
>  The spec already makes provision for a range of alternative
>devices, through DOM 3 I think, but I think we need something
a bit more
>granular than a pixel by pixel movement typically offered by
>devices.  The main reason for this, is that the HCI task
analysis for moving
>two points require the user to know where the pointer is in
relation to the
>target.  This can be done with speech, and there's an event
in JAWS to
>handle this, but having experimented with this on a small
number of users,
>doing the math necessary to work out the relationship between
pointer and
>target raised the cognitive workload, as measured by the
NASA-TLX test,
>quite significantly.
>  So, I propose the following eight keys to facilitate
document exploration
>within a ua:
>                             I.       Up (337.5 - 22.5)
>                           II.      Diagonally up and right
(22.5 - 67.5)
>                          III.       Right (67.5 - 112.5)
>                       IV.       Diagonally down and right
(112.5 - 157.5)
>                         V.       Down (157.5 - 202.5)
>                       VI.       Diagonally down and left
(202.5 - 247.5)
>                      VII.       Left (247.5 - 292.5)
>                    VIII.      Diagonally left and up (292.5
- 337.5)
>  Each of these keys will be responsible for moving to the
nearest element
>within a 45 arc, as listed above.
>  Will

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
College of Applied Life Studies
University of Illinois at Urbana/Champaign
1207 S. Oak Street, Champaign, IL  61820

Voice: (217) 244-5870
Fax: (217) 333-0248



Received on Tuesday, 23 November 2004 14:59:58 UTC