onTapDown property

GestureTapDownCallback onTapDown
read / write

A pointer that might cause a tap of a primary button has contacted the screen at a particular location.

This triggers once a short timeout (deadline) has elapsed, or once the gestures has won the arena, whichever comes first.

If the gesture doesn't win the arena, onTapCancel is called next. Otherwise, onTapUp is called next.

See also:

Implementation

GestureTapDownCallback onTapDown