Accessibility/Mobile/GestureInterface
< Accessibility | Mobile
Design Principals
- Single handed operation whenever possible
- Shallow learning curve
- Portable knowledge from other platforms (iOS VoiceOver and Android TalkBack)
- Avoid timing-sensitive input, and have little assumptions of user dexterity
- Provide a large margin of error (help the user avoid mistakes), and empower them to explore
Gesture Mappings
Screen Reader
| One Finger | |
| Double tap | Activate item |
| Swipe left/right | Move cursor to next/previous item |
| Touch/move on the screen | Move cursor to item under finger ("explore by touch") |
| Swipe up/down | Move cursor by granularity* or adjust value |
| Double tap-hold | Simulate long tap/drag* |
| Triple tap-hold | Open granularity menu* |
| Two Fingers | |
| Swipe up/down | Scroll by page length |
| Swipe left/right | Scroll or switch page |
Magnifier
| Two Fingers | |
| Double tap-hold drag down/up | Zoom in/out |
| Pan/Drag | Pan |