| // 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. |
| |
| // ignore_for_file: diagnostic_describe_all_properties |
| |
| import 'package:flutter/widgets.dart'; |
| import '../go_router.dart'; |
| |
| /// Default error page implementation for WidgetsApp. |
| class GoRouterErrorScreen extends StatelessWidget { |
| /// Provide an exception to this page for it to be displayed. |
| const GoRouterErrorScreen(this.error, {Key? key}) : super(key: key); |
| |
| /// The exception to be displayed. |
| final Exception? error; |
| |
| static const Color _kWhite = Color(0xFFFFFFFF); |
| |
| @override |
| Widget build(BuildContext context) => SafeArea( |
| child: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| const Text( |
| 'Page Not Found', |
| style: TextStyle(fontWeight: FontWeight.bold), |
| ), |
| const SizedBox(height: 16), |
| Text(error?.toString() ?? 'page not found'), |
| const SizedBox(height: 16), |
| _Button( |
| onPressed: () => context.go('/'), |
| child: const Text( |
| 'Go to home page', |
| style: TextStyle(color: _kWhite), |
| ), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| |
| class _Button extends StatefulWidget { |
| const _Button({ |
| required this.onPressed, |
| required this.child, |
| Key? key, |
| }) : super(key: key); |
| |
| final VoidCallback onPressed; |
| |
| /// The child subtree. |
| final Widget child; |
| |
| @override |
| State<_Button> createState() => _ButtonState(); |
| } |
| |
| class _ButtonState extends State<_Button> { |
| late final Color _color; |
| |
| @override |
| void didChangeDependencies() { |
| super.didChangeDependencies(); |
| _color = (context as Element) |
| .findAncestorWidgetOfExactType<WidgetsApp>() |
| ?.color ?? |
| const Color(0xFF2196F3); // blue |
| } |
| |
| @override |
| Widget build(BuildContext context) => GestureDetector( |
| onTap: widget.onPressed, |
| child: Container( |
| padding: const EdgeInsets.all(8), |
| color: _color, |
| child: widget.child, |
| ), |
| ); |
| } |