onDragStart property
getter/setter pair
A pointer has contacted the screen with a primary button and has begun to move.
The position of the pointer is provided in the callback's details
argument, which is a TapDragStartDetails object. The dragStartBehavior
determines this position.
The number of consecutive taps, and the keys that were pressed on tap down
are also provided in the callback's details argument.
See also:
- kPrimaryButton, the button this callback responds to.
- TapDragStartDetails, which is passed as an argument to this callback.
Implementation
GestureTapDragStartCallback? onDragStart;