[Qt-interest] Question about custom view (or custom delegate)

[Linos]

Hello,
I need to create an editor table and i would like to hear your suggestions 
because i am not sure what could be the best method to get it done.

I have an sql model with a QTableView that i have to maintain like an alternate 
method to input data to the database so i will make the model for the new view a 
QAbstractProxyModel subclass so the two views get updated with the model, i have 
done this before without problem but never i needed a view like that.

Original SQL Model has this columns.
barcode | supplier code | description | size | units | price | total | date

And i need to get an editor like this:
Qt Code:

barcode  | supplier code | description   | price | total price
15831500   090123-543      blue t-shirt     25$       275$
     |   Date         |  XXL  |  XL  |  L  |  M  |  S  | TOTAL
       2009-11-15        1      1      2     2     1      7
     |   Date         |  XXL  |  XL  |  L  |  M  |  S  | TOTAL
       2009-12-01        0      2      1     1     0      4

It seems like a QTreeView but the columns of parent and children are not in 
sync, and the children of other root items will not have the same number of size 
columns, i have thought make it a big column and add the headers in the cell 
with delegate paint method but then to me it does not seems like a treeview no 
more. I am sure will be much better ways to do that, any ideas please?

Regards,
Miguel Angel.