// 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 Focus 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 const MaterialApp( title: _title, home: MyStatefulWidget(), ); } } class MyStatefulWidget extends StatefulWidget { const MyStatefulWidget({Key? key}) : super(key: key); @override State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); } class _MyStatefulWidgetState extends State<MyStatefulWidget> { int focusedChild = 0; List<Widget> children = <Widget>[]; List<FocusNode> childFocusNodes = <FocusNode>[]; @override void initState() { super.initState(); // Add the first child. _addChild(); } @override void dispose() { super.dispose(); for (final FocusNode node in childFocusNodes) { node.dispose(); } } void _addChild() { // Calling requestFocus here creates a deferred request for focus, since the // node is not yet part of the focus tree. childFocusNodes .add(FocusNode(debugLabel: 'Child ${children.length}')..requestFocus()); children.add(Padding( padding: const EdgeInsets.all(2.0), child: ActionChip( focusNode: childFocusNodes.last, label: Text('CHILD ${children.length}'), onPressed: () {}, ), )); } @override Widget build(BuildContext context) { return Scaffold( body: Center( child: Wrap( children: children, ), ), floatingActionButton: FloatingActionButton( onPressed: () { setState(() { focusedChild = children.length; _addChild(); }); }, child: const Icon(Icons.add), ), ); } }