| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter/material.dart'; |
| import 'package:go_router/go_router.dart'; |
| |
| void main() => runApp(App()); |
| |
| /// The main app. |
| class App extends StatelessWidget { |
| /// Creates an [App]. |
| App({Key? key}) : super(key: key); |
| |
| /// The title of the app. |
| static const String title = 'GoRouter Example: Custom Error Screen'; |
| |
| @override |
| Widget build(BuildContext context) => MaterialApp.router( |
| routeInformationParser: _router.routeInformationParser, |
| routerDelegate: _router.routerDelegate, |
| title: title, |
| ); |
| |
| final GoRouter _router = GoRouter( |
| routes: <GoRoute>[ |
| GoRoute( |
| path: '/', |
| builder: (BuildContext context, GoRouterState state) => |
| const Page1Screen(), |
| ), |
| GoRoute( |
| path: '/page2', |
| builder: (BuildContext context, GoRouterState state) => |
| const Page2Screen(), |
| ), |
| ], |
| errorBuilder: (BuildContext context, GoRouterState state) => |
| ErrorScreen(state.error!), |
| ); |
| } |
| |
| /// The screen of the first page. |
| class Page1Screen extends StatelessWidget { |
| /// Creates a [Page1Screen]. |
| const Page1Screen({Key? key}) : super(key: key); |
| |
| @override |
| Widget build(BuildContext context) => Scaffold( |
| appBar: AppBar(title: const Text(App.title)), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| ElevatedButton( |
| onPressed: () => context.go('/page2'), |
| child: const Text('Go to page 2'), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| /// The screen of the second page. |
| class Page2Screen extends StatelessWidget { |
| /// Creates a [Page2Screen]. |
| const Page2Screen({Key? key}) : super(key: key); |
| |
| @override |
| Widget build(BuildContext context) => Scaffold( |
| appBar: AppBar(title: const Text(App.title)), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| ElevatedButton( |
| onPressed: () => context.go('/'), |
| child: const Text('Go to home page'), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| /// The screen of the error page |
| class ErrorScreen extends StatelessWidget { |
| /// Creates an [ErrorScreen]. |
| const ErrorScreen(this.error, {Key? key}) : super(key: key); |
| |
| /// The error to display. |
| final Exception error; |
| |
| @override |
| Widget build(BuildContext context) => Scaffold( |
| appBar: AppBar(title: const Text('My "Page Not Found" Screen')), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| SelectableText(error.toString()), |
| TextButton( |
| onPressed: () => context.go('/'), |
| child: const Text('Home'), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |