bytedesk-flutter/bytedesk_demo/lib/notification/custom_animation.dart

import 'package:flutter/material.dart';
import 'ios_toast.dart';

/// Example to show how to popup overlay with custom animation.
class CustomAnimationToast extends StatelessWidget {
  final double? value;

  static final Tween<Offset> tweenOffset = Tween<Offset>(begin: Offset(0, 40), end: Offset(0, 0));

  static final Tween<double> tweenOpacity = Tween<double>(begin: 0, end: 1);

  const CustomAnimationToast({Key? key, @required this.value}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Transform.translate(
      offset: tweenOffset.transform(value!),
      child: Opacity(
        child: IosStyleToast(),
        opacity: tweenOpacity.transform(value!),
      ),
    );
  }
}