onTapDown property

(void Function(TapDownDetails)?) onTapDown

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

This is called after a short timeout, even if the winning gesture has not yet been selected. If the tap gesture wins, onTapUp will be called, otherwise onTapCancel will be called.

See also:

• kPrimaryButton, the button this callback responds to.

Implementation

final void Function(TapDownDetails)? onTapDown;