mirror of
https://github.com/flutter/flutter.git
synced 2025-06-03 00:51:18 +00:00
5491c8c146
This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
67 lines
2.0 KiB
Dart
67 lines
2.0 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
/// Flutter code sample for [Switch].
|
|
|
|
void main() => runApp(const SwitchApp());
|
|
|
|
class SwitchApp extends StatelessWidget {
|
|
const SwitchApp({super.key});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return MaterialApp(
|
|
theme: ThemeData(useMaterial3: true),
|
|
home: Scaffold(
|
|
appBar: AppBar(title: const Text('Switch Sample')),
|
|
body: const Center(child: SwitchExample()),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class SwitchExample extends StatefulWidget {
|
|
const SwitchExample({super.key});
|
|
|
|
@override
|
|
State<SwitchExample> createState() => _SwitchExampleState();
|
|
}
|
|
|
|
class _SwitchExampleState extends State<SwitchExample> {
|
|
bool light = true;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
// This object sets amber as the track color when the switch is selected.
|
|
// Otherwise, it resolves to null and defers to values from the theme data.
|
|
const WidgetStateProperty<Color?> trackColor = WidgetStateProperty<Color?>.fromMap(
|
|
<WidgetStatesConstraint, Color>{WidgetState.selected: Colors.amber},
|
|
);
|
|
// This object sets the track color based on two WidgetState attributes.
|
|
// If neither state applies, it resolves to null.
|
|
final WidgetStateProperty<Color?> overlayColor = WidgetStateProperty<Color?>.fromMap(
|
|
<WidgetState, Color>{
|
|
WidgetState.selected: Colors.amber.withOpacity(0.54),
|
|
WidgetState.disabled: Colors.grey.shade400,
|
|
},
|
|
);
|
|
|
|
return Switch(
|
|
// This bool value toggles the switch.
|
|
value: light,
|
|
overlayColor: overlayColor,
|
|
trackColor: trackColor,
|
|
thumbColor: const WidgetStatePropertyAll<Color>(Colors.black),
|
|
onChanged: (bool value) {
|
|
// This is called when the user toggles the switch.
|
|
setState(() {
|
|
light = value;
|
|
});
|
|
},
|
|
);
|
|
}
|
|
}
|