A pair of question on TreeViews

[Gabriele Greco <gabriele greco darts it>]

- There is a way to change at THEME level, or with a simple rc file, 
without having to write an engine, the GFX of the checkmark you see in a 
GtkCellRendererToggle?

- There is a way to attach to a TreeView a custom widget as "cell" like 
you could for the rows in the old GtkList/GtkTree? Otherwise what is the 
correct method to make a list of quite complex object (some text, some 
gfx, some lines)?

Thanks in advance for the responses :)

Bye,
 Gabry