QTableView: select row with a specific id

Mark81

After sorting (i.e. ui->table->sortByColumn(MODEL_PACKAGES_COL_NAME)) the order of the rows in the QTableView may be different than those in the model. If I need to select (highlight) a row with a specific id, I do this:

void DialogPackages::selectId(int id)
{
    for (int i = 0; i < _model->rowCount(); i++)
    {
        QModelIndex index = _model->index(i, MODEL_PACKAGES_COL_ID);
        if (id == _model->data(index)) ui->table->selectRow(i);
    }
}

it works, but I wonder if there's something better to avoid to cycle all the rows every time.

Christian Ehrlicher

I don't see another way, apart from that you should break out once the row is found.

Mark81

@Christian-Ehrlicher said in QTableView: select row with a specific id:

I don't see another way, apart from that you should break out once the row is found.

Yep, of course I forgot to break the loop.
In other words, there are no efficient find methods built-in.

Christian Ehrlicher

@Mark81 said in QTableView: select row with a specific id:

there are no efficient find methods built-in.

build-in - no since it's your data, not something Qt has control of it.

Mark81

@Christian-Ehrlicher said in QTableView: select row with a specific id:

build-in - no since it's your data, not something Qt has control of it.

Not actually, I thought about a generic method like this:

int QTableView::findRow(int col, QVariant data);

it would return the (first) row number where data is present into column col. -1 otherwise.
Or a more generic one:

QList<int> QTableView::findRows(int col, QVariant data);

of course it's trivial to implement them in a rough way like I did above.
I was just afraid I didn't search well the documentation.

Christian Ehrlicher

Maybe QAbstractItemModel::match() - but custom stuff is faster I would guess