Finding QModelIndex of new entry into Model - c++

Question

I have a model that holds a sorted list of integers. New entries to the model look something like this:
if (!causesCollision(iCode))
{
beginInsertRows(QModelIndex(), this->rowCount(), this->rowCount());
this->_codes.append(iCode);
qSort(this->_codes);
endInsertRows();
return true;
}
I need the QListView that uses this model to automatically highlight new entries to the model, but currently I am unable to find the index of newly created row. this->_codes is a QList<int>.
First, I tried the rowsInserted(...) signal, but it only reports that a row was added at the end, not the position within the list that the new item was added.
I've tried something like this:
int iRow = this->_codes.indexOf(iCode);
QModelIndex index = this->index(iRow, 0);
emit ModelChanged(index);
With the ModelChanged(index) signal connected to the QListView's setCurrentIndex(index) slot, but it did not work.

Answer 1

If this->_codes is a list, you can easily get the index of the item you inserted after sorting. I would rewrite your insertion code in the following way:
if (!causesCollision(iCode))
{
// Calculate the insertion position in the list.
int row = 0;
while (row < _codes.size() && _codes.at(row) < iCode) {
row++;
}
beginInsertRows(QModelIndex(), row, row + 1);
_codes.insert(row, iCode); // Always insert sorted.
endInsertRows();
return true;
}
After this the rowsInserted() signal will indicate the right position where the new row has been inserted.