ssss

int rate = 10000;
model->setRowCount(rate * itemVec.size());

for (int j = 0; j < rate; ++j)
{
    for (int i = 0; i < itemVec.size(); ++i)
    {
        const OptionalMarketItem & info = itemVec.at(i);

        int row = i + j * itemVec.size();

        QModelIndex index = model->index(row, 0);
        model->setData(index, QString::number(info.price), Qt::DisplayRole);
        model->setData(index, int(Qt::AlignRight | Qt::AlignVCenter),Qt::TextAlignmentRole);
    }
}