TranslateTransition for Flutter

ranslate-transition-flutter.dart

class TranslateTransition extends AnimatedWidget {
  const TranslateTransition({
    Key key,
    @required Animation<double> translate,
    this.alignment = Alignment.center,
    this.child,
  }) : super(key: key, listenable: translate);

  Animation<double> get translate => listenable;

  final Alignment alignment;

  final Widget child;

  @override
  Widget build(BuildContext context) {
    final double translateValue = translate.value;
    final Matrix4 transform = Matrix4.identity()
//      ..translate(translateValue, translateValue, 1.0);
      ..translate(translateValue);
    return Transform(
      transform: transform,
      alignment: alignment,
      child: child,
    );
  }