| // Copyright 2014 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 'use_cases.dart'; |
| |
| class MaterialBannerUseCase extends UseCase { |
| |
| @override |
| String get name => 'MaterialBanner'; |
| |
| @override |
| String get route => '/material_banner'; |
| |
| @override |
| Widget build(BuildContext context) => const MainWidget(); |
| } |
| |
| class MainWidget extends StatefulWidget { |
| const MainWidget({super.key}); |
| |
| @override |
| State<MainWidget> createState() => MainWidgetState(); |
| } |
| |
| class MainWidgetState extends State<MainWidget> { |
| double currentSliderValue = 20; |
| ScaffoldFeatureController<MaterialBanner, MaterialBannerClosedReason>? controller; |
| |
| @override |
| Widget build(BuildContext context) { |
| VoidCallback? onPress; |
| if (controller == null) { |
| onPress = () { |
| setState(() { |
| controller = ScaffoldMessenger.of(context).showMaterialBanner( |
| MaterialBanner( |
| padding: const EdgeInsets.all(20), |
| content: const Text('Hello, I am a Material Banner'), |
| leading: const Icon(Icons.agriculture_outlined), |
| backgroundColor: Colors.green, |
| actions: <Widget>[ |
| TextButton( |
| onPressed: () { |
| controller!.close(); |
| setState(() { |
| controller = null; |
| }); |
| }, |
| child: const Text('DISMISS'), |
| ), |
| ], |
| ), |
| ); |
| }); |
| }; |
| } |
| return Scaffold( |
| appBar: AppBar( |
| backgroundColor: Theme.of(context).colorScheme.inversePrimary, |
| title: const Text('MaterialBanner'), |
| ), |
| body: Center( |
| child: ElevatedButton( |
| onPressed: onPress, |
| child: const Text('Show a MaterialBanner'), |
| ), |
| ), |
| ); |
| } |
| } |