如何使用Qpainter在Qt中绘制棋盘

class ChessBoardWidget : public QWidget {
    // ...
};

void ChessBoardWidget::paintEvent(QPaintEvent* event) {
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);

    // 绘制棋盘背景
    painter.setBrush(QColor("#D18B47"));
    painter.drawRect(rect());

    // 绘制棋盘格子
    int gridSize = 50; // 格子大小
    int rowCount = 8; // 行数
    int colCount = 8; // 列数

    painter.setPen(Qt::black);
    for (int row = 0; row < rowCount; ++row) {
        for (int col = 0; col < colCount; ++col) {
            if ((row + col) % 2 == 0) {
                painter.setBrush(Qt::white);
            } else {
                painter.setBrush(Qt::black);
            }
            painter.drawRect(col * gridSize, row * gridSize, gridSize, gridSize);
        }
    }
}

QWidget* mainWindow = new QWidget;
QVBoxLayout* layout = new QVBoxLayout(mainWindow);

ChessBoardWidget* chessBoard = new ChessBoardWidget;
layout->addWidget(chessBoard);

mainWindow->setLayout(layout);
mainWindow->show();