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main.dart
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main.dart
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:multiselect_nested/models/multiselect_nested_controller.dart';
import 'package:multiselect_nested/models/multiselect_nested_item.dart';
import 'package:multiselect_nested/multiselect_nested.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const Home(),
);
}
}
class Home extends StatefulWidget {
const Home({Key? key}) : super(key: key);
@override
State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
List<MultiSelectNestedItem> selected = [];
MultiSelectNestedController multiSelectController =
MultiSelectNestedController();
Future<List<MultiSelectNestedItem>> getJson() async {
var data = await rootBundle.loadString('assets/example_data.json');
return multiSelectNestedFromJson(data);
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: Center(
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: [
FutureBuilder<List<MultiSelectNestedItem>>(
future: getJson(),
builder: (BuildContext context,
AsyncSnapshot<List<MultiSelectNestedItem>> snapshot) {
switch (snapshot.connectionState) {
case ConnectionState.waiting:
return const Text('Loading....');
default:
if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
} else {
return Column(
children: [
MultiSelectNested(
controller: multiSelectController,
options: snapshot.data!,
selectedValues: selected,
isAnimatedContainer: false,
liveUpdateValues: false,
checkParentWhenChildIsSelected: true,
setSelectedValues:
(List<MultiSelectNestedItem> newValues) {
setState(() {
selected = newValues;
});
},
),
],
);
}
}
},
),
const SizedBox(
height: 20,
),
ElevatedButton(
onPressed: () {
print(
'values ${multiSelectController.getSelectedItems()} ${multiSelectController.getSelectedItems().length}');
setState(() {
selected = multiSelectController.getSelectedItems();
});
},
child: const Text('Update and Get Values'),
),
ElevatedButton(
onPressed: () {
multiSelectController.clearValues();
},
child: const Text('Clear Values'),
),
ElevatedButton(
onPressed: () {
multiSelectController.expandContainer();
},
child: const Text('Programmatically Expand Container'),
),
const SizedBox(
height: 20,
),
selected.isNotEmpty
? Column(
mainAxisAlignment: MainAxisAlignment.start,
children: selected.map((MultiSelectNestedItem item) {
return Text(item.name);
}).toList(),
)
: const Text('Still No Selected Values..')
],
),
),
),
),
);
}
}