如何在QStyledItemDelegate中设置QStyleOptionProgressBar的方向

void MyDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
    QStyledItemDelegate::paint(painter, option, index);

    if (index.column() == progressBarColumn) {
        QStyleOptionProgressBar progressBarOption;
        progressBarOption.initFrom(option.widget);
        progressBarOption.rect = option.rect;
        progressBarOption.minimum = 0;
        progressBarOption.maximum = 100;
        progressBarOption.progress = index.data().toInt();
        progressBarOption.textVisible = true;
        progressBarOption.textAlignment = Qt::AlignCenter;

        // 设置进度条方向为水平方向
        progressBarOption.orientation = Qt::Horizontal;

        // 绘制进度条
        QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter);
    }
}