【 Flutter 】Flutter を 基礎 から 学習 ( ウィジェット編 ) part55 Multi-child layout widgets

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

void main() {
  runApp(new MaterialApp(home: new MyApp()));
}

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _State();
  }
}

class _State extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('テスト中です。'),
        ),
        body: Container(
            alignment: Alignment.topLeft,
            child: Wrap(
              direction: Axis.vertical,
              children: <Widget>[
                box(txt: "1"),
                box(txt: "2"),
                box(txt: "3"),
                box(txt: "4"),
                box(txt: "5")
              ],
            )),
      ),
    );
  }

  Widget box(
      {double size = 120,
      Color color = Colors.green,
      Alignment alignment = Alignment.center,
      String txt = "0"}) {
    return Container(
        margin: const EdgeInsets.all(8),
        alignment: alignment,
        width: size,
        height: size,
        color: color,
        child: Text(txt));
  }
}