build method

@override Widget build(BuildContext context, Widget child, AnimationController controller, EffectEntry entry,)

Builds the widgets necessary to implement the effect, based on the provided AnimationController and EffectEntry.

Implementation

@override
Widget build(
  BuildContext context,
  Widget child,
  AnimationController controller,
  EffectEntry entry,
) {
  Animation<Offset> animation = buildAnimation(controller, entry);
  return getOptimizedBuilder<Offset>(
    animation: animation,
    builder: (_, __) {
      final double sigmaX = _normalizeSigma(animation.value.dx);
      final double sigmaY = _normalizeSigma(animation.value.dy);
      return ImageFiltered(
        enabled: sigmaX > minBlur || sigmaY > minBlur,
        imageFilter: ImageFilter.blur(
          sigmaX: sigmaX,
          sigmaY: sigmaY,
          tileMode: TileMode.decal,
        ),
        child: child,
      );
    },
  );
}