considerFling method

  1. @override
DragEndDetails? considerFling(
  1. VelocityEstimate estimate,
  2. PointerDeviceKind kind
)
override

Determines if a gesture is a fling or not, and if so its effective velocity.

A fling calls its gesture end callback with a velocity, allowing the provider of the callback to respond by carrying the gesture forward with inertia, for example.

Implementation

@override
DragEndDetails? considerFling(VelocityEstimate estimate, PointerDeviceKind kind) {
  if (!isFlingGesture(estimate, kind)) {
    return null;
  }
  final Velocity velocity = Velocity(pixelsPerSecond: estimate.pixelsPerSecond)
      .clampMagnitude(minFlingVelocity ?? kMinFlingVelocity, maxFlingVelocity ?? kMaxFlingVelocity);
  return DragEndDetails(
    velocity: velocity,
    globalPosition: lastPosition.global,
    localPosition: lastPosition.local,
  );
}