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449f4a6673
* 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
96 lines
2.8 KiB
Dart
96 lines
2.8 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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import '../../gallery/demo.dart';
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const String _text1 =
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'Snackbars provide lightweight feedback about an operation by '
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'showing a brief message at the bottom of the screen. Snackbars '
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'can contain an action.';
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const String _text2 =
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'Snackbars should contain a single line of text directly related '
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'to the operation performed. They cannot contain icons.';
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const String _text3 =
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'By default snackbars automatically disappear after a few seconds ';
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class SnackBarDemo extends StatefulWidget {
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const SnackBarDemo({ Key key }) : super(key: key);
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static const String routeName = '/material/snack-bar';
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@override
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_SnackBarDemoState createState() => _SnackBarDemoState();
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}
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class _SnackBarDemoState extends State<SnackBarDemo> {
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int _snackBarIndex = 1;
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Widget buildBody(BuildContext context) {
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return SafeArea(
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top: false,
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bottom: false,
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child: ListView(
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padding: const EdgeInsets.all(24.0),
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children: <Widget>[
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const Text(_text1),
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const Text(_text2),
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Center(
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child: RaisedButton(
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child: const Text('SHOW A SNACKBAR'),
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onPressed: () {
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final int thisSnackBarIndex = _snackBarIndex++;
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Scaffold.of(context).showSnackBar(SnackBar(
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content: Text('This is snackbar #$thisSnackBarIndex.'),
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action: SnackBarAction(
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label: 'ACTION',
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onPressed: () {
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Scaffold.of(context).showSnackBar(SnackBar(
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content: Text('You pressed snackbar $thisSnackBarIndex\'s action.'),
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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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const Text(_text3),
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]
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.map<Widget>((Widget child) {
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return Container(
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margin: const EdgeInsets.symmetric(vertical: 12.0),
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child: child,
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);
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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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@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('Snackbar'),
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actions: <Widget>[MaterialDemoDocumentationButton(SnackBarDemo.routeName)],
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),
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body: Builder(
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// Create an inner BuildContext so that the snackBar onPressed methods
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// can refer to the Scaffold with Scaffold.of().
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builder: buildBody
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),
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floatingActionButton: FloatingActionButton(
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child: const Icon(Icons.add),
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tooltip: 'Create',
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onPressed: () {
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print('Floating Action Button was pressed');
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},
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),
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);
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}
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}
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