getFlickTarget method

Offset getFlickTarget(dynamic dragEndDetails)

Implementation

Offset getFlickTarget(dynamic dragEndDetails) {
  Offset _delta = delta + Offset(dragEndDetails.velocity.pixelsPerSecond.dx * sensitivity, dragEndDetails.velocity.pixelsPerSecond.dy * sensitivity);

  if (boundKey == null) return _delta;

  normalisedConstraintsMin = constraintsMin! - viewOrigin! + boundOrigin!;
  normalisedConstraintsMax = constraintsMax! - viewOrigin! + boundOrigin! - Offset(viewWidth, viewHeight);
  if (_delta.dx < normalisedConstraintsMin.dx) _delta = Offset(normalisedConstraintsMin.dx - pow((_delta.dx - normalisedConstraintsMin.dx).abs(), flexibilityMin!.dx) + 1.0, _delta.dy);
  if (_delta.dx > normalisedConstraintsMax.dx) _delta = Offset(normalisedConstraintsMax.dx + pow((_delta.dx - normalisedConstraintsMax.dx).abs(), flexibilityMax!.dx) - 1.0, _delta.dy);
  if (_delta.dy < normalisedConstraintsMin.dy) _delta = Offset(_delta.dx, normalisedConstraintsMin.dy - pow((_delta.dy - normalisedConstraintsMin.dy).abs(), flexibilityMin!.dy) + 1.0);
  if (_delta.dy > normalisedConstraintsMax.dy) _delta = Offset(_delta.dx, normalisedConstraintsMax.dy + pow((_delta.dy - normalisedConstraintsMax.dy).abs(), flexibilityMax!.dy) - 1.0);

  return _delta;
}