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This extracts the sample code out from the API doc comments, and places them in separate files on disk, allowing running of the examples locally, testing them, and building of slightly larger examples.
97 lines
3.2 KiB
Dart
97 lines
3.2 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Template: dev/snippets/config/templates/stateless_widget_material.tmpl
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//
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// Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring
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// of samples, and may be ignored if you are just exploring the sample.
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// Flutter code sample for AppBar
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//
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//***************************************************************************
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//* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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// This sample shows an [AppBar] with two simple actions. The first action
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// opens a [SnackBar], while the second action navigates to a new page.
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//* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
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//***************************************************************************
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import 'package:flutter/material.dart';
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void main() => runApp(const MyApp());
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/// This is the main application widget.
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class MyApp extends StatelessWidget {
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const MyApp({Key? key}) : super(key: key);
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static const String _title = 'Flutter Code Sample';
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@override
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Widget build(BuildContext context) {
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return const MaterialApp(
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title: _title,
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home: MyStatelessWidget(),
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);
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}
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}
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/// This is the stateless widget that the main application instantiates.
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class MyStatelessWidget extends StatelessWidget {
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const MyStatelessWidget({Key? key}) : super(key: key);
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@override
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//********************************************************************
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//* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('AppBar Demo'),
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actions: <Widget>[
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IconButton(
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icon: const Icon(Icons.add_alert),
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tooltip: 'Show Snackbar',
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onPressed: () {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('This is a snackbar')));
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},
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),
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IconButton(
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icon: const Icon(Icons.navigate_next),
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tooltip: 'Go to the next page',
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onPressed: () {
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Navigator.push(context, MaterialPageRoute<void>(
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builder: (BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Next page'),
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),
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body: const Center(
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child: Text(
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'This is the next page',
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style: TextStyle(fontSize: 24),
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),
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),
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);
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},
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));
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},
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),
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],
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),
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body: const Center(
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child: Text(
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'This is the home page',
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style: TextStyle(fontSize: 24),
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),
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),
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);
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}
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//* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
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//********************************************************************
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}
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