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@vipulshah2010
Created January 16, 2023 12:56
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import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
static const String _title = 'Flutter Code Sample';
@override
Widget build(BuildContext context) {
return const MaterialApp(
restorationScopeId: 'app',
title: _title,
home: MyStatefulWidget(restorationId: 'main'),
);
}
}
class MyStatefulWidget extends StatefulWidget {
const MyStatefulWidget({super.key, this.restorationId});
final String? restorationId;
@override
State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}
/// RestorationProperty objects can be used because of RestorationMixin.
class _MyStatefulWidgetState extends State<MyStatefulWidget>
with RestorationMixin {
// In this example, the restoration ID for the mixin is passed in through
// the [StatefulWidget]'s constructor.
@override
String? get restorationId => widget.restorationId;
final RestorableDateTime _selectedDate =
RestorableDateTime(DateTime(2021, 7, 25));
late final RestorableRouteFuture<DateTime?> _restorableDatePickerRouteFuture =
RestorableRouteFuture<DateTime?>(
onComplete: _selectDate,
onPresent: (NavigatorState navigator, Object? arguments) {
return navigator.restorablePush(
_datePickerRoute,
arguments: _selectedDate.value.millisecondsSinceEpoch,
);
},
);
static Route<DateTime> _datePickerRoute(
BuildContext context,
Object? arguments,
) {
return DialogRoute<DateTime>(
context: context,
builder: (BuildContext context) {
return DatePickerDialog(
restorationId: 'date_picker_dialog',
initialEntryMode: DatePickerEntryMode.calendarOnly,
initialDate: DateTime.fromMillisecondsSinceEpoch(arguments! as int),
firstDate: DateTime(2021),
lastDate: DateTime(2022),
);
},
);
}
@override
void restoreState(RestorationBucket? oldBucket, bool initialRestore) {
registerForRestoration(_selectedDate, 'selected_date');
registerForRestoration(
_restorableDatePickerRouteFuture, 'date_picker_route_future');
}
void _selectDate(DateTime? newSelectedDate) {
if (newSelectedDate != null) {
setState(() {
_selectedDate.value = newSelectedDate;
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text(
'Selected: ${_selectedDate.value.day}/${_selectedDate.value.month}/${_selectedDate.value.year}'),
));
});
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: OutlinedButton(
onPressed: () {
_restorableDatePickerRouteFuture.present();
},
child: const Text('Open Date Picker'),
),
),
);
}
}
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