[pygtk] treestore sqlalchemy examples

[Alberto Ruiz]

2009/9/22 Alessandro Dentella <sandro at e-den.it>:
>> I like it for extensibility and mapping to complex sql schema's, but
>> I was thinking if I could map all columns of a treeview and an extra
>> column for the path. The path could then be applied to create the
>
> in the first, non public, release of sqlkit I used a 1:1 mapping between
> liststore (I don't currently use treestores) and it turned out to be slower.
>
> Ythe reason is that in that case, you have to distribute the data you get
> from the class to the model for all values of the model, while I let the
> column's cell_data_function to do it just for the visible cells.

Hi guys,

What you guys should be doing is implementing the TreeModel interface
on top of your ORM instead of feeding a TreeStore/ListStore object.

Note that treestore/liststore is just a reference implementation of
the treemodel interface that gets abused very often (actually due to
TreeModel being a huge interface to implement though). This would be
the only way to have a proper model with an acceptable performance.

-- 
Cheers,
Alberto Ruiz