[pygtk] How to embed a widget into a tree node?

[nielinjie]

Hi list:
    I tried to embed a widget (in my case, it is a HBox) in to a tree
node using
GenericCellRenderer. I followed pygtk FAQ No.13.45 (
http://faq.pygtk.org/index.py?req=show&file=faq13.045.htp ). But I got a
error reads that hbox.draw method only take one argument, not 4 (like
shown in the FAQ code).
    Thanks for any help...