Printing the exact contents of a QTableView (QTableWidget)

QPrintPreviewDialog, QTableView, print, QTableWidget, Qt

Good day.
Again as a note.
There was a need to print an exact copy of the contents of QTableWidget with delegates, etc.
It turned out the following:

void FinalPage::on_pushButtonPrint_clicked()
{

    int width = 0;
    int height = 0;
    int columns = ui->tableWidgetName->columnCount();
    int rows = ui->tableWidgetName->rowCount();

    for( int i = 0; i < columns; ++i ) {
        width += ui->tableWidgetName->columnWidth(i);
    }

    for( int i = 0; i < rows; ++i ) {
        height += ui->tableWidgetName->rowHeight(i);
    }

    ui->tableWidgetName->setFixedSize(width, height);
    ui->tableWidgetName->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    ui->tableWidgetName->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

    QPrintPreviewDialog  *prDialog = new QPrintPreviewDialog(&printer, this);

    ui->tableWidgetName->render(&printer);

    connect(prDialog,&QPrintPreviewDialog::paintRequested,this,&FinalPage::printPreviewNeeds);

    prDialog->showMaximized();
    prDialog->exec();

}

void FinalPage::printPreviewNeeds(QPrinter *)
{
    ui->tableWidgetName->render(&printer);
}