33403bd28e
This extracts the sample code out from the API doc comments, and places them in separate files on disk, allowing running of the examples locally, testing them, and building of slightly larger examples.
134 lines
4.7 KiB
Dart
134 lines
4.7 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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// Template: dev/snippets/config/templates/stateful_widget_material.tmpl
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//
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// Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring
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// of samples, and may be ignored if you are just exploring the sample.
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// Flutter code sample for FocusNode.unfocus
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//
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//***************************************************************************
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//* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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// This example shows the difference between the different [UnfocusDisposition]
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// values for [unfocus].
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//
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// Try setting focus on the four text fields by selecting them, and then
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// select "UNFOCUS" to see what happens when the current
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// [FocusManager.primaryFocus] is unfocused.
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//
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// Try pressing the TAB key after unfocusing to see what the next widget
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// chosen is.
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//* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
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//***************************************************************************
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//****************************************************************************
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//* ▼▼▼▼▼▼▼▼ code-imports ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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import 'package:flutter/foundation.dart';
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//* ▲▲▲▲▲▲▲▲ code-imports ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
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//****************************************************************************
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import 'package:flutter/material.dart';
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void main() => runApp(const MyApp());
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/// This is the main application widget.
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class MyApp extends StatelessWidget {
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const MyApp({Key? key}) : super(key: key);
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static const String _title = 'Flutter Code Sample';
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@override
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Widget build(BuildContext context) {
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return const MaterialApp(
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title: _title,
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home: MyStatefulWidget(),
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);
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}
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}
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/// This is the stateful widget that the main application instantiates.
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class MyStatefulWidget extends StatefulWidget {
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const MyStatefulWidget({Key? key}) : super(key: key);
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@override
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State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
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}
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/// This is the private State class that goes with MyStatefulWidget.
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class _MyStatefulWidgetState extends State<MyStatefulWidget> {
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//********************************************************************
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//* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker)
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UnfocusDisposition disposition = UnfocusDisposition.scope;
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@override
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Widget build(BuildContext context) {
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return Material(
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child: Container(
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color: Colors.white,
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Wrap(
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children: List<Widget>.generate(4, (int index) {
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return const SizedBox(
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width: 200,
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child: Padding(
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padding: EdgeInsets.all(8.0),
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child: TextField(
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decoration: InputDecoration(border: OutlineInputBorder()),
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),
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),
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);
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}),
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),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceAround,
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children: <Widget>[
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...List<Widget>.generate(UnfocusDisposition.values.length,
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(int index) {
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return Row(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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Radio<UnfocusDisposition>(
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groupValue: disposition,
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onChanged: (UnfocusDisposition? value) {
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setState(() {
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if (value != null) {
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disposition = value;
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}
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});
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},
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value: UnfocusDisposition.values[index],
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),
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Text(describeEnum(UnfocusDisposition.values[index])),
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],
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);
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}),
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OutlinedButton(
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child: const Text('UNFOCUS'),
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onPressed: () {
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setState(() {
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primaryFocus!.unfocus(disposition: disposition);
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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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//* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker)
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//********************************************************************
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}
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