GtkTreeView: different renderes within one row?

[Felix Kater <fkater googlemail com>]

hi,

I am new to GtkTreeView:

Are cell renderers bound to columns or can they change between rows of
the same column?

I'd like to create a two column list with simple text display on the
left but each row having a different renderer on the right (combo,
spin, entry).

Thanks
Felix