QSqlQueryModel headerData Qt::Vertical Display keep increasing the row numbers

[umen242]

i SubClassed the QSqlQueryModel and i try to calculate the Vertical header display based on select query . the wierd thing here is that the headerData method keep calling itself and the number ofcource keep increasing . why ? isn't it called as many times as the rows displayed? this is my function

@QVariant ListSqlModel::headerData(int section, Qt::Orientation orientation, int role) const
{

if(orientation == Qt::Vertical && role == Qt::DisplayRole)
{

    int returnHeaderCount = iHeaderCount;
    QString h = QString::number(returnHeaderCount);
    LOG_MSG("RowCount:"+h.toStdString());
    iHeaderCount++;
    return returnHeaderCount;
}

}
@

[goetz]

You cannot rely on the fact that headerData is only called once.

If you have pagination, I would add an attribute to the model, holding the current start index (= offset from the start) of the result set (as passed to limit/offset in the query) and in headerData just add that offset to the section number. This way your return value is always the same.