dropdown_flex 0.0.1

A flexible Flutter dropdown widget with customizable design and a fix for the auto-focus scroll issue when navigating via keyboard.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:dropdown_flex/dropdown_flex.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(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  final options = List.generate(100, (index) => 'Option $index');

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: CustomDropdownMenu<String>(
          menuHeight: 300.0,
          width: 200,
          focusNode: FocusNode(),
          dropdownMenuEntries: [
            for (var item in options)
              FlexDropdownMenuEntry<String>(
                value: item,
                label: item,
              ),
          ],
          searchCallback: (entries, query) {
            if (query.isEmpty) {
              return null;
            }
            final int index =
                entries.indexWhere((FlexDropdownMenuEntry<String> entry) => entry.label == query);
            return index != -1 ? index : null;
          },
          trailingIcon: const Icon(
            Icons.keyboard_arrow_down_rounded,
            size: 24,
          ),
          selectedTrailingIcon: const Icon(
            Icons.keyboard_arrow_up_rounded,
            size: 24,
          ),
          hintText: "Select...",
          enableFilter: true,
          enableSearch: true,
          requestFocusOnTap: true,
          onSelected: (value) {},
        ),
      ),
    );
  }
}