build method

@override Widget build(BuildContext context, Animator animator, Widget child)

AnimatorWidget calls build to retrieve the animated Widget. The extracted Animator from the getDefinition phase is injected to supply a controller and the Animation objects. Example: @override Widget build(BuildContext context, Animator animator, Widget child) { return FadeTransition( opacity: animation.get('opacity'), child: child, ); }

Implementation

@override
Widget build(BuildContext context, Animator animator, Widget child) {
  return FadeTransition(
    opacity: animator.get("opacity") as Animation<double>,
    child: AnimatedBuilder(
      animation: animator.controller!,
      child: child,
      builder: (BuildContext context, Widget? child) => Transform(
        child: child,
        transform: Matrix4.translationValues(
                animator.get("translateX")!.value, 0.0, 0.0) *
            Matrix4.rotationZ(animator.get("rotateZ")!.value),
        alignment: Alignment.center,
      ),
    ),
  );
}