mirror of
https://github.com/flutter/flutter.git
synced 2025-06-03 00:51:18 +00:00
fd9ce27748
This does a cleanup of the examples, removing all of the "section" markers and extra comments that we don't need anymore now that the samples are no longer in the source code. It also removes the --template arguments from the {@tool dartpad} and {@tool sample} directives, since those are no longer used. It converts two examples that I discovered were still embedded into linked examples in the examples folder.
I didn't delete the templates from the snippets config folder yet, because there are still embedded samples in the dart:ui package from the engine that use them. Once dart:ui no longer uses the templates, they can be removed.
I bumped the version of the snippets package to pick up a change that allows removal of the --template argument.
70 lines
1.8 KiB
Dart
70 lines
1.8 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.
|
|
|
|
// Flutter code sample for DropdownButton.style
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
void main() => runApp(const MyApp());
|
|
|
|
class MyApp extends StatelessWidget {
|
|
const MyApp({Key? key}) : super(key: key);
|
|
|
|
static const String _title = 'Flutter Code Sample';
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return MaterialApp(
|
|
title: _title,
|
|
home: Scaffold(
|
|
appBar: AppBar(title: const Text(_title)),
|
|
body: const MyStatefulWidget(),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class MyStatefulWidget extends StatefulWidget {
|
|
const MyStatefulWidget({Key? key}) : super(key: key);
|
|
|
|
@override
|
|
State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
|
|
}
|
|
|
|
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
|
|
List<String> options = <String>['One', 'Two', 'Free', 'Four'];
|
|
String dropdownValue = 'One';
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
alignment: Alignment.center,
|
|
color: Colors.blue,
|
|
child: DropdownButton<String>(
|
|
value: dropdownValue,
|
|
onChanged: (String? newValue) {
|
|
setState(() {
|
|
dropdownValue = newValue!;
|
|
});
|
|
},
|
|
style: const TextStyle(color: Colors.blue),
|
|
selectedItemBuilder: (BuildContext context) {
|
|
return options.map((String value) {
|
|
return Text(
|
|
dropdownValue,
|
|
style: const TextStyle(color: Colors.white),
|
|
);
|
|
}).toList();
|
|
},
|
|
items: options.map<DropdownMenuItem<String>>((String value) {
|
|
return DropdownMenuItem<String>(
|
|
value: value,
|
|
child: Text(value),
|
|
);
|
|
}).toList(),
|
|
),
|
|
);
|
|
}
|
|
}
|