Dumb bottom nav bar with non-trivial tap event listener

not_so_dumb_bottom_nav_bar.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Rock Paper Scissors',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final List<BottomNavigationBarItem> navItemList = [
    BottomNavigationBarItem(
      icon: Icon(Icons.casino),
      title: Text('Rock!'),
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.casino),
      title: Text('Paper!'),
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.casino),
      title: Text('Scissor!'),
    )
  ];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Rock Paper Scissors')),
      body: Center(child: Text('Coming soon ...')),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: 0,
        /// This is not a non-trivial event listener
        /// although it still doesn't do much.
        onTap: (int index) {
          print('bottom nav bar tapped @ index ' + index.toString());
        },
        items: navItemList,
      ),
    );
  }
}