Class derivated from QTableView, setcolumnwidth(col,width) doesn't do anything

[A Former User]

Hi,
I have an object tableview from a class derivated from QTableView and SetColumnWidth(col,size) doesn't do anything.tableview has always the same size and each column has the same size and I cannot change that with setcolumnwidth.
Is it because I use a custom delegate to paint one column and in the case of other columns I call ```
QStyledItemDelegate::paint(painter, option, index);

? 
What Can I do to change the size of each column ?
tableview is inside a QGroupbox.and I use here Qt5.6.0.

[A Former User]

I have put

else if (role == Qt::SizeHintRole) {
        switch(nColumn)
        {
            case 0: return QSize(40,40);
            case 1: return QSize(50,40);
            case 2: return QSize(50,40);
            case 3: return QSize(130,40);
            case 4: return QSize(130,40);
            case 5: return QSize(40,40);
            case 6: return QSize(40,40);
        default:
            break;
        }

in the data and Headerdata method of my model class and it is better now because tableview is not too large anymore, but each column has always the same width although....

[A Former User]

I have put that :

if (qobject_cast<QHeaderView *>(parent()) != 0)
    {
     
        if ((index.column()==n_file)||(index.column()==n_execinfo))
        {

        width = 150;
        height =20;
        return QSize(width,height);
        }
        else return QSize(40,20);
    }
    else if (qobject_cast<QTableView *>(parent()) != 0)
    {
        QTableView *v = qobject_cast<QTableView *>(parent());
        width = v->columnWidth(index.column());
        height=v->rowHeight(0);
        return QSize(width,height);
}

in the overloading of the method sizehint of my delegate but it is useless...

[A Former User]

I think I should use a QTableWidget without delegate and with multiple inheritance to set the width of each column.....