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Create form_widget.dart #287

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216 changes: 216 additions & 0 deletions lib/widgets/form_widget.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. 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';
import 'package:intl/intl.dart' as intl;

class FormWidgetsDemo extends StatefulWidget {
const FormWidgetsDemo({Key? key}) : super(key: key);

@override
_FormWidgetsDemoState createState() => _FormWidgetsDemoState();
}

class _FormWidgetsDemoState extends State<FormWidgetsDemo> {
final _formKey = GlobalKey<FormState>();
String title = '';
String description = '';
DateTime date = DateTime.now();
double maxValue = 0;
bool? brushedTeeth = false;
bool enableFeature = false;

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Form widgets'),
),
body: Form(
key: _formKey,
child: Scrollbar(
child: Align(
alignment: Alignment.topCenter,
child: Card(
child: SingleChildScrollView(
padding: const EdgeInsets.all(16),
child: ConstrainedBox(
constraints: const BoxConstraints(maxWidth: 400),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
...[
TextFormField(
decoration: const InputDecoration(
filled: true,
hintText: 'Enter a title...',
labelText: 'Title',
),
onChanged: (value) {
setState(() {
title = value;
});
},
),
TextFormField(
decoration: const InputDecoration(
border: OutlineInputBorder(),
filled: true,
hintText: 'Enter a description...',
labelText: 'Description',
),
onChanged: (value) {
description = value;
},
maxLines: 5,
),
_FormDatePicker(
date: date,
onChanged: (value) {
setState(() {
date = value;
});
},
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'Estimated value',
style: Theme.of(context).textTheme.bodyText1,
),
],
),
Text(
intl.NumberFormat.currency(
symbol: "\$", decimalDigits: 0)
.format(maxValue),
style: Theme.of(context).textTheme.subtitle1,
),
Slider(
min: 0,
max: 500,
divisions: 500,
value: maxValue,
onChanged: (value) {
setState(() {
maxValue = value;
});
},
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Checkbox(
value: brushedTeeth,
onChanged: (checked) {
setState(() {
brushedTeeth = checked;
});
},
),
Text('Brushed Teeth',
style: Theme.of(context).textTheme.subtitle1),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text('Enable feature',
style: Theme.of(context).textTheme.bodyText1),
Switch(
value: enableFeature,
onChanged: (enabled) {
setState(() {
enableFeature = enabled;
});
},
),
],
),
].expand(
(widget) => [
widget,
const SizedBox(
height: 24,
)
],
)
],
),
),
),
),
),
),
),
);
}
}

class _FormDatePicker extends StatefulWidget {
final DateTime date;
final ValueChanged<DateTime> onChanged;

const _FormDatePicker({
required this.date,
required this.onChanged,
});

@override
_FormDatePickerState createState() => _FormDatePickerState();
}

class _FormDatePickerState extends State<_FormDatePicker> {
@override
Widget build(BuildContext context) {
return Row(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Text(
'Date',
style: Theme.of(context).textTheme.bodyText1,
),
Text(
intl.DateFormat.yMd().format(widget.date),
style: Theme.of(context).textTheme.subtitle1,
),
],
),
TextButton(
child: const Text('Edit'),
onPressed: () async {
var newDate = await showDatePicker(
context: context,
initialDate: widget.date,
firstDate: DateTime(1900),
lastDate: DateTime(2100),
);

// Don't change the date if the date picker returns null.
if (newDate == null) {
return;
}

widget.onChanged(newDate);
},
)
],
);
}
}