import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        pageTransitionsTheme: PageTransitionsTheme(
          builders: {
            for (var platform in TargetPlatform.values)
              platform: FadeForwardsPageTransitionsBuilder(),
          },
        ),
      ),
      home: const HomeScreen(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,

          children: [
            ElevatedButton(
              onPressed: () {
                showDialog(
                  context: context,
                  builder: (context) {
                    return TheDialog();
                  },
                );
              },
              child: const Text('тык'),
            ),
            const SizedBox(height: 20),
            ElevatedButton(
              onPressed: () {
                Navigator.push(
                  context,
                  PageRouteBuilder(
                    opaque: false,
                    barrierDismissible: true,
                    barrierColor: Colors.black54,
                    pageBuilder: (
                      BuildContext context,
                      Animation<double> animation,
                      Animation<double> secondaryAnimation,
                    ) {
                      return TheDialog();
                    },
                  ),
                );
              },
              child: const Text('другой тык'),
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Dialog(
      child: Center(
        child: ElevatedButton(
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => Scaffold(appBar: AppBar()),
              ),
            );
          },
          child: Text('тык 2'),
        ),
      ),
    );
  }
}