animated_custom_dropdown_v2 1.5.2

Custom dropdown widget allows to add highly customizable widget in your projects with proper open and close animations and also comes with form required validation.

example/lib/main.dart

import 'package:animated_custom_dropdown_v2/custom_dropdown.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Custom Dropdown App',
      home: Home(),
    );
  }
}

const _labelStyle = TextStyle(fontWeight: FontWeight.w600);

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

  @override
  State<Home> createState() => _HomeState();
}

class RoleItem extends DropDownItem {
  final String value;

  RoleItem({required this.value});

  @override
  String get displayText => value;

  @override
  String toString() {
    return 'RoleItem{value: $value}';
  }
}

class _HomeState extends State<Home> {
  final formKey = GlobalKey<FormState>();
  final List<RoleItem> list = ['Developer', 'Designer', 'Consultant', 'Student']
      .map((e) => RoleItem(value: e))
      .toList();
  RoleItem? selectedItem1;
  RoleItem? selectedItem2;
  RoleItem? selectedItem3;
  RoleItem? selectedItem4;

  Future<List<RoleItem>> getFakeRequestData(String query) async {
    print('Future Search Query: $query');
    List<RoleItem> data = list;

    return await Future.delayed(const Duration(seconds: 1), () {
      return data.where((e) {
        return e.value.toLowerCase().contains(query.toLowerCase());
      }).toList();
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[200],
      appBar: AppBar(
        systemOverlayStyle: SystemUiOverlayStyle.dark.copyWith(
          statusBarColor: Colors.white,
        ),
        backgroundColor: Colors.white,
        elevation: .25,
        title: const Text(
          'Custom Dropdown Example',
          style: TextStyle(color: Colors.black, fontSize: 18),
        ),
      ),
      body: ListView(
        padding: const EdgeInsets.all(16.0),
        children: [
          const Text('Job Roles Dropdown', style: _labelStyle),
          const SizedBox(height: 8),
          CustomDropdownV2<RoleItem>(
            hintText: 'Select job role',
            items: list,
            excludeSelected: false,
            onItemSelected: (value) {
              print('onItemSelected item $value');
              setState(() {
                selectedItem1 = value;
              });
            },
            selectedItem: selectedItem1,
          ),
          const SizedBox(height: 24),
          const Divider(height: 0),
          const SizedBox(height: 24),

          // dropdown having search field
          const Text('Job Roles Search Dropdown', style: _labelStyle),
          const SizedBox(height: 8),
          CustomDropdownV2<RoleItem>.search(
            hintText: 'Select job role',
            items: list,
            onItemSelected: (value) {
              setState(() {
                selectedItem2 = value;
              });
              print('onItemSelected item $value');
            },
            onSearchTextChange: (value) {
              print('onSearchTextChange $value');
            },
            selectedItem: selectedItem2,
            emptyResultWidget: const Center(
              child: Padding(
                padding: EdgeInsets.symmetric(vertical: 12.0),
                child: Text(
                  'Add New Job Role',
                  style: TextStyle(fontSize: 16),
                ),
              ),
            ),
            onEmptyResultClick: () {
              print('onEmptyResultClick');
            },
          ),
          const SizedBox(height: 24),
          const Divider(height: 0),
          const SizedBox(height: 24),

          // dropdown having search request field (making fake call)
          const Text('Job Roles Search Request Dropdown', style: _labelStyle),
          const SizedBox(height: 8),
          CustomDropdownV2<RoleItem>.searchRequest(
            selectedItem: selectedItem3,
            futureRequest: getFakeRequestData,
            hintText: 'Search job role',
            // waits 3 seconds before start searching (before execute the 'futureRequest' function)
            futureRequestDelay: const Duration(seconds: 3),
            onItemSelected: (value) {
              setState(() {
                selectedItem3 = value;
              });
              print('onItemSelected item $value');
            },
          ),
          const SizedBox(height: 24),
          const Divider(height: 0),
          const SizedBox(height: 24),

          // using form for validation
          Form(
            key: formKey,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                const Text(
                  'Job Roles Dropdown with Form validation',
                  style: _labelStyle,
                ),
                const SizedBox(height: 8),
                CustomDropdownV2<RoleItem>.search(
                  selectedItem: selectedItem4,
                  hintText: 'Select job role',
                  items: list,
                  excludeSelected: false,
                  listItemBuilder: (context, result) {
                    return Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        Text(result.displayText),
                        const Icon(Icons.person)
                      ],
                    );
                  },
                  onItemSelected: (value) {
                    setState(() {
                      selectedItem4 = value;
                    });
                    print('onItemSelected item $value');
                  },
                  onSearchTextChange: (value) {
                    print('onSearchTextChange $value');
                  },
                ),
                const SizedBox(height: 16),
                SizedBox(
                  width: double.infinity,
                  child: ElevatedButton(
                    onPressed: () {
                      if (!formKey.currentState!.validate()) {
                        return;
                      }
                    },
                    child: const Text(
                      'Submit',
                      style: TextStyle(fontWeight: FontWeight.w600),
                    ),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}