freezer/lib/page_routes/blur_slide.dart

import 'package:flutter/widgets.dart';
import 'package:freezer/page_routes/basic_page_route.dart';
import 'package:freezer/ui/animated_blur.dart';

class BlurSlidePageRoute<T> extends BasicPageRoute<T> {
  final WidgetBuilder builder;
  final Curve animationCurve;
  final _animationTween = Tween(
    begin: const Offset(0.0, 1.0),
    end: Offset.zero,
  );

  BlurSlidePageRoute({
    required this.builder,
    this.animationCurve = Curves.linearToEaseOut,
    super.transitionDuration,
    super.maintainState,
    super.settings,
  });

  @override
  Widget buildPage(BuildContext context, Animation<double> animation,
          Animation<double> secondaryAnimation) =>
      builder(context);

  @override
  Widget buildTransitions(BuildContext context, Animation<double> animation,
      Animation<double> secondaryAnimation, Widget child) {
    final a = CurvedAnimation(parent: animation, curve: animationCurve);
    return Stack(children: [
      Positioned.fill(
        child: AnimatedBlur(
            animation: a, multiplier: 10.0, child: const SizedBox()),
      ),
      SlideTransition(position: _animationTween.animate(a), child: child),
    ]);
  }
}