| // 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. |
| |
| // Template: dev/snippets/config/templates/stateful_widget_material.tmpl |
| // |
| // Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring |
| // of samples, and may be ignored if you are just exploring the sample. |
| |
| // Flutter code sample for Scaffold |
| // |
| //*************************************************************************** |
| //* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| // This example shows a [Scaffold] with an [AppBar], a [BottomAppBar] and a |
| // [FloatingActionButton]. The [body] is a [Text] placed in a [Center] in order |
| // to center the text within the [Scaffold]. The [FloatingActionButton] is |
| // centered and docked within the [BottomAppBar] using |
| // [FloatingActionButtonLocation.centerDocked]. The [FloatingActionButton] is |
| // connected to a callback that increments a counter. |
| // |
| // ![](https://flutter.github.io/assets-for-api-docs/assets/material/scaffold_bottom_app_bar.png) |
| |
| //* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //*************************************************************************** |
| |
| import 'package:flutter/material.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| /// This is the main application widget. |
| class MyApp extends StatelessWidget { |
| const MyApp({Key? key}) : super(key: key); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const MaterialApp( |
| title: _title, |
| home: MyStatefulWidget(), |
| ); |
| } |
| } |
| |
| /// This is the stateful widget that the main application instantiates. |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({Key? key}) : super(key: key); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| /// This is the private State class that goes with MyStatefulWidget. |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| //******************************************************************** |
| //* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| int _count = 0; |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| appBar: AppBar( |
| title: const Text('Sample Code'), |
| ), |
| body: Center( |
| child: Text('You have pressed the button $_count times.'), |
| ), |
| bottomNavigationBar: BottomAppBar( |
| shape: const CircularNotchedRectangle(), |
| child: Container(height: 50.0), |
| ), |
| floatingActionButton: FloatingActionButton( |
| onPressed: () => setState(() { |
| _count++; |
| }), |
| tooltip: 'Increment Counter', |
| child: const Icon(Icons.add), |
| ), |
| floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked, |
| ); |
| } |
| |
| //* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //******************************************************************** |
| |
| } |