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aba0379dcc
This is not a grand refactor yet, it's just cleaning up what we have already, so that people who keep using this API (e.g. dialogs) have something coherent to deal with. The major changes are that Navigator and NavigatorState have the same API now, that most of the examples use `<void>` instead of `<Null>`, that the navigator observer can see replaces, and that the `settings` is moved from ModalRoute to Route. I also cleaned up some of the API documentation.
100 lines
3.5 KiB
Dart
100 lines
3.5 KiB
Dart
// Copyright 2016 The Chromium 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/cupertino.dart';
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import 'package:flutter/material.dart';
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class CupertinoDialogDemo extends StatefulWidget {
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static const String routeName = '/cupertino/dialog';
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@override
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_CupertinoDialogDemoState createState() => new _CupertinoDialogDemoState();
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}
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class _CupertinoDialogDemoState extends State<CupertinoDialogDemo> {
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final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
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void showDemoDialog<T>({ BuildContext context, Widget child }) {
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showDialog<T>(
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context: context,
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barrierDismissible: false,
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builder: (BuildContext context) => child,
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)
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.then<void>((T value) { // The value passed to Navigator.pop() or null.
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if (value != null) {
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_scaffoldKey.currentState.showSnackBar(new SnackBar(
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content: new Text('You selected: $value')
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));
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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 new Scaffold(
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key: _scaffoldKey,
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appBar: new AppBar(
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title: const Text('Cupertino Dialogs'),
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),
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body: new ListView(
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padding: const EdgeInsets.symmetric(vertical: 24.0, horizontal: 72.0),
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children: <Widget> [
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new CupertinoButton(
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child: const Text('Alert'),
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color: CupertinoColors.activeBlue,
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onPressed: () {
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showDemoDialog<String>(
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context: context,
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child: new CupertinoAlertDialog(
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content: const Text('Discard draft?'),
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actions: <Widget>[
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new CupertinoDialogAction(
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child: const Text('Discard'),
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isDestructiveAction: true,
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onPressed: () { Navigator.pop(context, 'Discard'); }
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),
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new CupertinoDialogAction(
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child: const Text('Cancel'),
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isDefaultAction: true,
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onPressed: () { Navigator.pop(context, 'Cancel'); }
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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 Padding(padding: const EdgeInsets.all(8.0)),
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new CupertinoButton(
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child: const Text('Alert with Title'),
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color: CupertinoColors.activeBlue,
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padding: const EdgeInsets.symmetric(vertical: 16.0, horizontal: 36.0),
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onPressed: () {
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showDemoDialog<String>(
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context: context,
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child: new CupertinoAlertDialog(
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title: const Text('Allow "Maps" to access your location while you use the app?'),
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content: const Text(
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'Your current location will be displayed on the map and used for directions, '
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'nearby search results, and estimated travel times.'
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),
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actions: <Widget>[
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new CupertinoDialogAction(
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child: const Text('Don\'t Allow'),
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onPressed: () { Navigator.pop(context, 'Disallow'); }
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),
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new CupertinoDialogAction(
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child: const Text('Allow'),
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onPressed: () { Navigator.pop(context, 'Allow'); }
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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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}
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}
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