Where a floating stick or button can be picked up: "half", its half
of the screen; "screen", anywhere; or a rectangle, in viewport pixels.
Where areas overlap, a finger landing takes the first control free
there: fixed buttons, fixed sticks, floating buttons, floating sticks.
Floating buttons sharing an area split it: the finger goes to the one
resting nearest to it.
Where a floating stick or button can be picked up:
"half", its half of the screen;"screen", anywhere; or a rectangle, in viewport pixels.Where areas overlap, a finger landing takes the first control free there: fixed buttons, fixed sticks, floating buttons, floating sticks. Floating buttons sharing an area split it: the finger goes to the one resting nearest to it.