import 'package:animations/animations.dart';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';

void main() {
  timeDilation = 5;
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool _firsPage = true;

  void _changePage() {
    setState(() {
      _firsPage = !_firsPage;
    });
  }

  @override
  Widget build(BuildContext context) {
    const text = 'Flutter 2.5.3';
    return Scaffold(
      body: Center(
        child: PageTransitionSwitcher(
          reverse: _firsPage,
          duration: const Duration(milliseconds: 200),
          transitionBuilder: (
            Widget child,
            Animation<double> animation,
            Animation<double> secondaryAnimation,
          ) {
            return SharedAxisTransition(
              child: child,
              animation: animation,
              secondaryAnimation: secondaryAnimation,
              transitionType: SharedAxisTransitionType.horizontal,
            );
          },
          child: _firsPage
              ? Container(
                  key: const ValueKey(1),
                  padding: const EdgeInsets.all(20),
                  color: Colors.blue,
                  child: const Text(text, style: TextStyle(fontSize: 40)),
                )
              : Container(
                  key: const ValueKey(2),
                  padding: const EdgeInsets.all(20),
                  color: Colors.red,
                  child: const Text(text, style: TextStyle(fontSize: 40)),
                ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
          onPressed: _changePage,
          tooltip: 'ChangePage',
          child: const Icon(Icons.update)),
    );
  }
}