Piemenu application

Goal:
To enable blind users better locate themselves in mobile touch screens which failed to provide tactile feedback.
Approach:
To activate enlarged pie menu with items of all the nearby characters based on relative locations of QWERTY keyboard, around the tap contact point. By doing so, the blind users can navigate among all the nearby characters by clock-wise finger tuning instead of having to locate the exact place of the desired character.
Libraries of Objective C++:
voiceover, UIKeyboard

touchpie code

Resources:

Flow menu from Stanford U.

Popie from University of Tsukuba