import 'package:flutter/material.dart';

void main() => runApp(const App());

class App extends StatefulWidget {
  const App({super.key});

  @override
  State<App> createState() => _AppState();
}

class _AppState extends State<App> {
  bool useFadeTransition = false;

  void togglePageTransitionType() {
    setState(() {
      useFadeTransition = !useFadeTransition;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme:
          useFadeTransition
              ? ThemeData(
                pageTransitionsTheme: PageTransitionsTheme(
                  builders:
                      Map<TargetPlatform, PageTransitionsBuilder>.fromIterable(
                        TargetPlatform.values,
                        value:
                            (_) => const FadeForwardsPageTransitionsBuilder(),
                      ),
                ),
              )
              : null,
      home: FirstPage(
        useFadeTransition: useFadeTransition,
        togglePageTransitionType: togglePageTransitionType,
      ),
    );
  }
}

class FirstPage extends StatelessWidget {
  final bool useFadeTransition;
  final VoidCallback togglePageTransitionType;

  const FirstPage({
    super.key,
    required this.useFadeTransition,
    required this.togglePageTransitionType,
  });

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('First Page')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'Current Page Transition Type:\n${useFadeTransition ? 'FadeForwardsPageTransitionsBuilder' : 'Default (ZoomPageTransitionsBuilder)'}',
              textAlign: TextAlign.center,
            ),
            ElevatedButton(
              onPressed: togglePageTransitionType,
              child: Text('Toggle Page Transition Type'),
            ),
            ElevatedButton(
              child: Text('Open Modal BottomSheet'),
              onPressed: () {
                showModalBottomSheet(
                  context: context,
                  builder:
                      (context) => Container(
                        height: 200,
                        color: Colors.amber,
                        child: Center(
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.center,
                            mainAxisSize: MainAxisSize.min,
                            children: <Widget>[
                              const Text('Modal BottomSheet'),
                              ElevatedButton(
                                child: const Text('Second Page'),
                                onPressed:
                                    () => Navigator.of(context).push(
                                      MaterialPageRoute<SecondPage>(
                                        builder:
                                            (BuildContext context) =>
                                                SecondPage(),
                                      ),
                                    ),
                              ),
                            ],
                          ),
                        ),
                      ),
                );
              },
            ),
          ],
        ),
      ),
    );
  }
}

class SecondPage extends StatelessWidget {
  const SecondPage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(appBar: AppBar(title: Text('Second Page')));
  }
}