クレしんのFlutter版

uhohooooooi.dart

// 以下の整理&最近使う方法での書き方
// https://gist.github.com/sho-ito-1027/a5887ca05bb5884719dfdc281a799777

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

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

class Colors {
  const Colors._();

  static const topColor = Color(0xFFF183A4);
  static const bottomColor = Color(0xFFF3F380);
  static const titleColor = Color(0xFF61035F);
}

class TextStyles {
  const TextStyles._();

  static const TextStyle _default = TextStyle(
    color: Colors.titleColor,
  );

  static TextStyle title3 = _default.copyWith(fontSize: 20.0);
  static TextStyle caption2 = _default.copyWith(fontSize: 11.0);
}

extension TextStyleExt on TextStyle {
  TextStyle bold() => copyWith(fontWeight: FontWeight.w800);
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'クレヨンしんちゃん',
      home: Scaffold(
        body: Center(
          child: Container(
            padding: const EdgeInsets.all(16.0),
            width: 400,
            height: 300,
            decoration: const BoxDecoration(
              gradient: LinearGradient(
                  begin: Alignment.topCenter,
                  end: Alignment.bottomCenter,
                  colors: <Color>[Colors.topColor, Colors.bottomColor]),
            ),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      "かいはつとちゅう",
                      style: TextStyles.caption2,
                    ),
                    Text(
                      "開発途中で",
                      style: TextStyles.title3.bold(),
                    ),
                  ],
                ),
                Padding(
                  padding: const EdgeInsets.only(left: 32),
                  child: Text(
                    "だいたいプレビュー使わなくなるゾ",
                    textAlign: TextAlign.end,
                    style: TextStyles.title3.bold(),
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}