Can't setHeaderData in class derived from QAbstractTableModel[SOLVED]

[Roma_12]

Hello again.

I tried to create my own model derived from QAbstractTableModel. I have inherited it like that:

class MyTableModel: public QAbstractTableModel {
....
public:
    int rowCount(const QModelIndex& index) const;
    int columnCount(const QModelIndex& index) const { return 2; }
    QVariant data(const QModelIndex & index, int role) const;
....
}

My model is working fine except I can't change the header of row:

MyTableModel model;
bool is_change = model.setHeaderData(0, Qt::Horizontal, "Column1");
qDebug() << is_change;

All time in console I see "false".
Also I tried reimplement this method with calling headerDataChanged(), but the false answer still exists.

Please, help me to change header data)
Thank you

[SGaist]

Hi,

Maybe a silly question but: do you have at least one column in your model ?

[Roma_12]

@SGaist
No. So I can set Header Name only after I have create first row?

[SGaist]

AFAIK, you can't set a header on a row/column that doesn't exist. The row/column can be empty, but it still needs to exist

[Roma_12]

@SGaist

Sorry.
I understood my mistake.
The point is that I have done mistake in my previous code.
I have two columns(not two rows) and trying to specify one of them.

[Roma_12]

It's again me.
The only thing which I needed to do - to reimplement this method :

QVariant QAbstractItemModel::headerData(int section, Qt::Orientation orientation, int role) const.

Thanks