enum_as_values_capitalized

import 'package:flutter/material.dart';
import 'package:intl/intl.dart' show toBeginningOfSentenceCase;

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Test(),
        ),
      ),
    );
  }
}

enum Locations {
  belgium,
  germany,
  spain
}

class Test extends StatefulWidget {
  
  @override
  _TestState createState() => _TestState();
}

class _TestState extends State<Test> {
  
  Locations? _selectedLocation;
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('hi'),
      ),
      drawer: Drawer(),
      body: Container(
        padding: EdgeInsets.all(7),
        child: Center(
          child: Column(
            children: [
              SizedBox(
                height: 40,
              ),
              DropdownButton(
                // Not necessary for Option 1
                value: _selectedLocation,
                onChanged: (Locations? newValue) {
                  setState(() {
                    _selectedLocation = newValue;
                  });
                },
                items: Locations.values.map((location) {
                  return DropdownMenuItem(
                    child: Text(toBeginningOfSentenceCase(location.name).toString()),
                    value: location,
                  );
                }).toList(),
              ),
              SizedBox(
                height: 40,
              ),
              Text('Option 2'),
              SizedBox(
                height: 40,
              ),
            ],
          ),
        ),
      ),
    );
  }
}