dart-20211223-button.dart

import 'package:flutter/material.dart';
// test dart
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(
        appBar: AppBar(
          title: const Text('hello world'),
        ),
        body: Center(
          child: Column(
            children: [
              const SizedBox(height: 100.0,),
              TextButton(
                onPressed: () {},
                child: const Text("Text BUTTON"),
              ),
              const SizedBox(height: 100.0,),
              ElevatedButton(
                onPressed: () {},
                child: const Text("Elevated BUTTON"),
              ),
              const SizedBox(height: 100.0,),
              OutlinedButton(
                onPressed: () {},
                child: const Text("Outlined BUTTON"),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Text(
      'Hello, World!!!',
      style: Theme.of(context).textTheme.headline4,
    );
  }
}