build method

@override Widget build(BuildContext context)

Override this method to build widgets that depend on the state of the listenable (e.g., the current value of the animation).

Implementation

@override
Widget build(BuildContext context) {
  final position = listenable as Animation<double>;
  Offset offset = _tween.evaluate(position);
  if (position.status == AnimationStatus.reverse) {
    switch (direction) {
      case AxisDirection.up:
        offset = Offset(offset.dx, -offset.dy);
        break;
      case AxisDirection.right:
        offset = Offset(-offset.dx, offset.dy);
        break;
      case AxisDirection.down:
        offset = Offset(offset.dx, -offset.dy);
        break;
      case AxisDirection.left:
        offset = Offset(-offset.dx, offset.dy);
        break;
    }
  }
  return FractionalTranslation(
    translation: offset,
    transformHitTests: transformHitTests,
    child: child,
  );
}