How to get the number of records that fit in a QTableView window?

Question

Qt

it is necessary to find kol-in records which are visible to the user.
the only thing that comes to mind is to find the height of the table and divide by the height of the row...

Answer 1

This is actually a difficult task, and I solved it like this.

QHeaderView* header = ui->tableView->verticalHeader();
QWidget* viewport = header->viewport();
int i1 = header->logicalIndexAt(0);
int i2 = header->logicalIndexAt(viewport->height() - 1);
if (i2 < 0)
    i2 = header->count() - 1;
QString s = QString::number(i1) + " - " + QString::number(i2);
ui->lbResult->setText(s);

If in a very simplified form, then a little not so.

return m_tableView->viewport()->height() / m_tableView->rowHeight(0);

Answer 2

Here is the answer:

return m_tableView->height() / m_tableView->rowHeight(0) - 1;