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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.
105 lines
3.3 KiB
Dart
105 lines
3.3 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/stateful_widget_material_ticker.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 TabBar
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//
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//***************************************************************************
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//* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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// [TabBar] can also be implemented by using a [TabController] which provides more options
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// to control the behavior of the [TabBar] and [TabBarView]. This can be used instead of
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// a [DefaultTabController], demonstrated below.
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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: MyStatefulWidget(),
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);
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}
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}
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/// This is the stateful widget that the main application instantiates.
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class MyStatefulWidget extends StatefulWidget {
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const MyStatefulWidget({Key? key}) : super(key: key);
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@override
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State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
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}
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/// This is the private State class that goes with MyStatefulWidget.
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/// AnimationControllers can be created with `vsync: this` because of TickerProviderStateMixin.
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class _MyStatefulWidgetState extends State<MyStatefulWidget>
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with TickerProviderStateMixin {
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//********************************************************************
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//* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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late TabController _tabController;
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@override
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void initState() {
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super.initState();
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_tabController = TabController(length: 3, vsync: this);
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}
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@override
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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('TabBar Widget'),
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bottom: TabBar(
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controller: _tabController,
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tabs: const <Widget>[
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Tab(
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icon: Icon(Icons.cloud_outlined),
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),
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Tab(
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icon: Icon(Icons.beach_access_sharp),
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),
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Tab(
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icon: Icon(Icons.brightness_5_sharp),
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),
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],
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),
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),
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body: TabBarView(
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controller: _tabController,
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children: const <Widget>[
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Center(
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child: Text("It's cloudy here"),
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),
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Center(
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child: Text("It's rainy here"),
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),
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Center(
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child: Text("It's sunny here"),
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),
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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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