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* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
122 lines
3.5 KiB
Dart
122 lines
3.5 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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import 'package:flutter/material.dart';
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// This app is a stateful, it tracks the user's current choice.
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class BasicAppBarSample extends StatefulWidget {
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@override
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_BasicAppBarSampleState createState() => _BasicAppBarSampleState();
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}
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class _BasicAppBarSampleState extends State<BasicAppBarSample> {
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Choice _selectedChoice = choices[0]; // The app's "state".
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void _select(Choice choice) {
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setState(() { // Causes the app to rebuild with the new _selectedChoice.
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_selectedChoice = choice;
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});
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Basic AppBar'),
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actions: <Widget>[
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IconButton( // action button
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icon: Icon(choices[0].icon),
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onPressed: () { _select(choices[0]); },
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),
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IconButton( // action button
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icon: Icon(choices[1].icon),
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onPressed: () { _select(choices[1]); },
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),
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PopupMenuButton<Choice>( // overflow menu
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onSelected: _select,
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itemBuilder: (BuildContext context) {
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return choices.skip(2).map<PopupMenuItem<Choice>>((Choice choice) {
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return PopupMenuItem<Choice>(
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value: choice,
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child: Text(choice.title),
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);
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}).toList();
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},
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),
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],
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),
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body: Padding(
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padding: const EdgeInsets.all(16.0),
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child: ChoiceCard(choice: _selectedChoice),
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),
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),
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);
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}
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}
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class Choice {
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const Choice({ this.title, this.icon });
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final String title;
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final IconData icon;
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}
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const List<Choice> choices = <Choice>[
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Choice(title: 'Car', icon: Icons.directions_car),
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Choice(title: 'Bicycle', icon: Icons.directions_bike),
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Choice(title: 'Boat', icon: Icons.directions_boat),
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Choice(title: 'Bus', icon: Icons.directions_bus),
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Choice(title: 'Train', icon: Icons.directions_railway),
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Choice(title: 'Walk', icon: Icons.directions_walk),
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];
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class ChoiceCard extends StatelessWidget {
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const ChoiceCard({ Key key, this.choice }) : super(key: key);
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final Choice choice;
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@override
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Widget build(BuildContext context) {
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final TextStyle textStyle = Theme.of(context).textTheme.display1;
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return Card(
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color: Colors.white,
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child: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: <Widget>[
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Icon(choice.icon, size: 128.0, color: textStyle.color),
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Text(choice.title, style: textStyle),
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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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void main() {
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runApp(BasicAppBarSample());
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}
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/*
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Sample Catalog
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Title: AppBar Basics
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Summary: A basic AppBar with a title, actions, and an overflow dropdown menu.
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Description:
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An app that displays one of a half dozen choices with an icon and a title.
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The two most common choices are available as action buttons and the remaining
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choices are included in the overflow dropdown menu.
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Classes: AppBar, IconButton, PopupMenuButton, Scaffold
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Sample: BasicAppBarSample
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See also:
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- The "Layout-Structure" section of the material design specification:
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<https://material.io/guidelines/layout/structure.html#structure-app-bar>
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*/
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