Questions from Mobile TF

Last week (Jan 10) we had a joint LV & Mobile call.
After our call this week Mobile had a couple more questions for us the
low-vision group – they are in column *I* in the Mobile spreadsheet:
https://docs.google.com/spreadsheets/d/1wRAViPfAJ4Ytqc71tGZp6gU07HNd2QQaNgtJsog-D90/edit#gid=124994642

I have linearized the information below.

Mobile would like responses before next Thursday (Jan 24)

Questions are in cells i2 and i4.
*Cell i2 *is related to Spacing between touch targets - set a minimum
number of pixels between targets. the issue being some users need larger
targets; hover over then can break the design aesthetics; consider exempt
text but then may have challenge for menus. Low vision concerns are related
to if user is holding device close to see, finger visually gets in the way
more (obstructs view of target).

*Questions for low vision group: *How many pixels in between meets user
need on the low-vision side? We have it at two pixels. And does the overall
target size impact the spacing requirements? ------
*Cell i4 *When (hidden) functionality is available via gestures or
movement, the user is informed of / instructions are available for, the
method on how to use them, can be turned off, and can also be operated by
user interface components via alternative ways. this is related to our very
scant thoughts on visual affordance.
Arguably 2.5.1 pointer gestures and 2.5.4 Motion Actuation make that less
urgent as a single pointer operable control with meaningful accName needs
to be present anyway to conform. Would information need differentiation by
mode of use (e.g. when default action is to swipe left to open drawer, this
will be different when turning on screen reader it may not work, or engage
two fingers - or is this a non-issue?)
*Questions for low vision group:* can we group this together with what you
are working on with visual affordance – how should we work together on
this?

-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9452 http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964