multi_dropdown 2.1.1

Streamlined Flutter widget for versatile multi-selection with extensive customization.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:multi_dropdown/multiselect_dropdown.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      themeMode: ThemeMode.dark,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.green,
      ),
      home: const MyHomePage(),
    );
  }
}

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();

  static const _headerStyle = TextStyle(
    fontSize: 12,
    color: Colors.blue,
  );
}

class User {
  final String name;
  final int id;

  User({required this.name, required this.id});

  @override
  String toString() {
    return 'User(name: $name, id: $id)';
  }
}

class _MyHomePageState extends State<MyHomePage> {
  final MultiSelectController<User> _controller = MultiSelectController();

  final List<ValueItem> _selectedOptions = [];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        backgroundColor: Colors.grey.shade300,
        body: SafeArea(
          child: Padding(
            padding: const EdgeInsets.all(8),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Text('WRAP', style: MyHomePage._headerStyle),
                const SizedBox(
                  height: 4,
                ),
                MultiSelectDropDown<User>(
                  showClearIcon: true,
                  controller: _controller,
                  onOptionSelected: (options) {
                    debugPrint(options.toString());
                  },
                  options: <ValueItem<User>>[
                    ValueItem(
                        label: 'Option 1', value: User(name: 'User 1', id: 1)),
                    ValueItem(
                        label: 'Option 2', value: User(name: 'User 2', id: 2)),
                    ValueItem(
                        label: 'Option 3', value: User(name: 'User 3', id: 3)),
                    ValueItem(
                        label: 'Option 4', value: User(name: 'User 4', id: 4)),
                    ValueItem(
                        label: 'Option 5', value: User(name: 'User 5', id: 5)),
                  ],
                  maxItems: 4,
                  selectionType: SelectionType.multi,
                  chipConfig: const ChipConfig(
                      wrapType: WrapType.wrap, backgroundColor: Colors.red),
                  dropdownHeight: 300,
                  optionTextStyle: const TextStyle(fontSize: 16),
                  selectedOptionIcon: const Icon(
                    Icons.check_circle,
                    color: Colors.pink,
                  ),
                  selectedOptionTextColor: Colors.blue,
                  searchEnabled: true,
                  dropdownMargin: 2,
                  optionSeparator: const SizedBox(
                    height: 1,
                    child: Divider(
                      color: Colors.black,
                    ),
                  ),
                ),
                const SizedBox(
                  height: 50,
                ),
                Wrap(
                  children: [
                    ElevatedButton(
                      onPressed: () {
                        _controller.clearAllSelection();
                        setState(() {
                          _selectedOptions.clear();
                        });
                      },
                      child: const Text('CLEAR'),
                    ),
                    const SizedBox(
                      width: 8,
                    ),
                    ElevatedButton(
                      onPressed: () {
                        setState(() {
                          _selectedOptions.clear();
                          _selectedOptions.addAll(_controller.selectedOptions);
                        });
                      },
                      child: const Text('Get Selected Options'),
                    ),
                    const SizedBox(
                      width: 8,
                    ),
                    ElevatedButton(
                      onPressed: () {
                        if (_controller.isDropdownOpen) {
                          _controller.hideDropdown();
                        } else {
                          _controller.showDropdown();
                        }
                      },
                      child: const Text('SHOW/HIDE DROPDOWN'),
                    ),
                  ],
                ),
                const SizedBox(
                  height: 12,
                ),
                Text(
                  'Selected Options: $_selectedOptions',
                  style: const TextStyle(
                    fontSize: 16,
                    fontWeight: FontWeight.bold,
                  ),
                ),
                const SizedBox(
                  height: 50,
                ),
                const Text('SCROLL', style: MyHomePage._headerStyle),
                const SizedBox(
                  height: 4,
                ),
                MultiSelectDropDown(
                  onOptionSelected: (options) {
                    debugPrint(options.toString());
                  },
                  options: const <ValueItem>[
                    ValueItem(label: 'Option 1', value: '1'),
                    ValueItem(label: 'Option 2', value: '2'),
                    ValueItem(label: 'Option 3', value: '3'),
                    ValueItem(label: 'Option 4', value: '4'),
                    ValueItem(label: 'Option 5', value: '5'),
                    ValueItem(label: 'Option 6', value: '6'),
                  ],
                  selectionType: SelectionType.multi,
                  chipConfig: const ChipConfig(wrapType: WrapType.scroll),
                  dropdownHeight: 400,
                  optionTextStyle: const TextStyle(fontSize: 16),
                  selectedOptionIcon: const Icon(Icons.check_circle),
                ),
                const SizedBox(
                  height: 50,
                ),
                const Text('FROM NETWORK', style: MyHomePage._headerStyle),
                const SizedBox(
                  height: 4,
                ),
                MultiSelectDropDown.network(
                  dropdownHeight: 300,
                  onOptionSelected: (options) {
                    debugPrint(options.toString());
                  },
                  searchEnabled: true,
                  networkConfig: NetworkConfig(
                    url: 'https://jsonplaceholder.typicode.com/users',
                    method: RequestMethod.get,
                    headers: {
                      'Content-Type': 'application/json',
                    },
                  ),
                  chipConfig: const ChipConfig(wrapType: WrapType.wrap),
                  responseParser: (response) {
                    final list = (response as List<dynamic>).map((e) {
                      final item = e as Map<String, dynamic>;
                      return ValueItem(
                        label: item['name'],
                        value: item['id'].toString(),
                      );
                    }).toList();

                    return Future.value(list);
                  },
                  responseErrorBuilder: ((context, body) {
                    return const Padding(
                      padding: EdgeInsets.all(16.0),
                      child: Text('Error fetching the data'),
                    );
                  }),
                ),
                const SizedBox(height: 50)
              ],
            ),
          ),
        ));
  }
}