Create InputDevice ViewBehavior
ViewBehavior will be a static inner class for InputDevice, providing
View-related behaviors pertaining to an InputDevice. We have added an
API in InputDevice to return its ViewBehavior.
This will be helpful if different InputDevice properties affect the way
an input- generated MotionEvent should be handled by a View. For
example, we have implemented a "shouldSmoothScroll" API in this change.
This API is to tell Views processing motions generated by the
InputDevice to prefer animating scrolls caused by such motions, to
deliver a better quality scrolling UX than compared to a regular scroll
that jumps by X pixels in a single frame.
Note that, a single ViewBehavior instance contains all behaviors for a
single InputDevice. This is unlike the other inner static class of
InputDevice: MotionRange. This decision of making a single ViewBehavior
contain all behaviors is made because not all View behaviors may depend
on source+axis (e.g. there could be a behavior that is globally
applicable to the whole InputDevice).
Bug: 246946631
Test: unit tests, manual
Change-Id: I65cf7d6556e26d199c9021f53bdae183f21d3c6d
5 files changed