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// 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 [RawAutocomplete].
void main() => runApp(const AutocompleteExampleApp());
class AutocompleteExampleApp extends StatelessWidget {
const AutocompleteExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('RawAutocomplete Form'),
),
body: const Center(
child: AutocompleteFormExample(),
),
),
);
}
}
class AutocompleteFormExample extends StatefulWidget {
const AutocompleteFormExample({super.key});
@override
AutocompleteFormExampleState createState() => AutocompleteFormExampleState();
}
class AutocompleteFormExampleState extends State<AutocompleteFormExample> {
final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
final TextEditingController _textEditingController = TextEditingController();
String? _dropdownValue;
String? _autocompleteSelection;
static const List<String> _options = <String>[
'aardvark',
'bobcat',
'chameleon',
];
@override
Widget build(BuildContext context) {
return Form(
key: _formKey,
child: Column(
children: <Widget>[
DropdownButtonFormField<String>(
value: _dropdownValue,
icon: const Icon(Icons.arrow_downward),
hint: const Text('This is a regular DropdownButtonFormField'),
elevation: 16,
style: const TextStyle(color: Colors.deepPurple),
onChanged: (String? newValue) {
setState(() {
_dropdownValue = newValue;
});
},
items: <String>['One', 'Two', 'Free', 'Four'].map<DropdownMenuItem<String>>((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
validator: (String? value) {
if (value == null) {
return 'Must make a selection.';
}
return null;
},
),
TextFormField(
controller: _textEditingController,
decoration: const InputDecoration(
hintText: 'This is a regular TextFormField',
),
validator: (String? value) {
if (value == null || value.isEmpty) {
return "Can't be empty.";
}
return null;
},
),
RawAutocomplete<String>(
optionsBuilder: (TextEditingValue textEditingValue) {
return _options.where((String option) {
return option.contains(textEditingValue.text.toLowerCase());
});
},
onSelected: (String selection) {
setState(() {
_autocompleteSelection = selection;
});
},
fieldViewBuilder: (
BuildContext context,
TextEditingController textEditingController,
FocusNode focusNode,
VoidCallback onFieldSubmitted,
) {
return TextFormField(
controller: textEditingController,
decoration: const InputDecoration(
hintText: 'This is a RawAutocomplete!',
),
focusNode: focusNode,
onFieldSubmitted: (String value) {
onFieldSubmitted();
},
validator: (String? value) {
if (!_options.contains(value)) {
return 'Nothing selected.';
}
return null;
},
);
},
optionsViewBuilder: (
BuildContext context,
AutocompleteOnSelected<String> onSelected,
Iterable<String> options,
) {
return Align(
alignment: Alignment.topLeft,
child: Material(
elevation: 4.0,
child: SizedBox(
height: 200.0,
child: ListView.builder(
padding: const EdgeInsets.all(8.0),
itemCount: options.length,
itemBuilder: (BuildContext context, int index) {
final String option = options.elementAt(index);
return GestureDetector(
onTap: () {
onSelected(option);
},
child: ListTile(
title: Text(option),
),
);
},
),
),
),
);
},
),
ElevatedButton(
onPressed: () {
FocusScope.of(context).unfocus();
if (!_formKey.currentState!.validate()) {
return;
}
showDialog<void>(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: const Text('Successfully submitted'),
content: SingleChildScrollView(
child: ListBody(
children: <Widget>[
Text('DropdownButtonFormField: "$_dropdownValue"'),
Text('TextFormField: "${_textEditingController.text}"'),
Text('RawAutocomplete: "$_autocompleteSelection"'),
],
),
),
actions: <Widget>[
TextButton(
child: const Text('Ok'),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
},
child: const Text('Submit'),
),
],
),
);
}
}