こちらの続きです。
React クラスコンポーネント propsの型指定2 - C#ATIA
こちらを取り組みました。
チュートリアル:React の導入 – React
素の状態だとチュートリアルと見た目が違う・・・。
恐らくCSSだろうとは思うのですが。(画像左)
折角なのでMaterial-UIを利用したのが右側です。
import React from 'react';
import { BrowserRouter as Router, Switch, Route } from 'react-router-dom';
import CssBaseline from '@material-ui/core/CssBaseline';
import Card from '@material-ui/core/Card';
import CardContent from '@material-ui/core/CardContent';
import Button from '@material-ui/core/Button';
function Square(props) {
return (
<Button
className="square"
variant="contained"
color="primary"
onClick={props.onClick}
>
{props.value}
</Button>
);
}
class Board extends React.Component {
renderSquare(i) {
return (
<Square
value={this.props.squares[i]}
onClick={() => this.props.onClick(i)}
/>
);
}
render() {
return (
<div>
<div className="board-row">
{this.renderSquare(0)}
{this.renderSquare(1)}
{this.renderSquare(2)}
</div>
<div className="board-row">
{this.renderSquare(3)}
{this.renderSquare(4)}
{this.renderSquare(5)}
</div>
<div className="board-row">
{this.renderSquare(6)}
{this.renderSquare(7)}
{this.renderSquare(8)}
</div>
</div>
);
}
}
class Game extends React.Component {
constructor(props) {
super(props);
this.state = {
history: [
{
squares: Array(9).fill(null),
},
],
stepNumber: 0,
xIsNext: true,
};
}
handleClick(i) {
const history = this.state.history.slice(0, this.state.stepNumber + 1);
const current = history[history.length - 1];
const squares = current.squares.slice();
if (calculateWinner(squares) || squares[i]) {
return;
}
squares[i] = this.state.xIsNext ? 'X' : 'O';
this.setState({
history: history.concat([
{
squares: squares,
},
]),
stepNumber: history.length,
xIsNext: !this.state.xIsNext,
});
}
jumpTo(step) {
this.setState({
stepNumber: step,
xIsNext: step % 2 === 0,
});
}
render() {
const history = this.state.history;
const current = history[this.state.stepNumber];
const winner = calculateWinner(current.squares);
const moves = history.map((step, move) => {
const desc = move ? 'Go to move #' + move : 'Go to game start';
return (
<li key={move}>
<Button
variant="contained"
color="secondary"
onClick={() => this.jumpTo(move)}
>
{desc}
</Button>
</li>
);
});
let status;
if (winner) {
status = 'Winner: ' + winner;
} else {
status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
}
return (
<div className="game">
<div className="game-board">
<Board
squares={current.squares}
onClick={(i) => this.handleClick(i)}
/>
</div>
<CssBaseline />
<div className="game-info">
<Card>
<CardContent>{status}</CardContent>
</Card>
<ol>{moves}</ol>
</div>
</div>
);
}
}
function calculateWinner(squares) {
const lines = [
[0, 1, 2],
[3, 4, 5],
[6, 7, 8],
[0, 3, 6],
[1, 4, 7],
[2, 5, 8],
[0, 4, 8],
[2, 4, 6],
];
for (let i = 0; i < lines.length; i++) {
const [a, b, c] = lines[i];
if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
return squares[a];
}
}
return null;
}
export default function App() {
return (
<Router>
<Switch>
<Route path="/" component={Game} />
</Switch>
</Router>
);
}
テーマの利用の仕方がイマイチわからないなぁ。