Formating non-text cells in an Gtk::TreeView

[Bob Caryl <bob fis-cal com>]

Hey guys:

I have a TreeView that has a model with several columns set up as 
doubles.  When these are displayed by the TreeView, they have six zeros 
trailing the decimal point.  I want to do two things with these: 

1)  reduce the displayed precision to two decimal places.
2)  align all the displayed numbers to the right instead of the left.

I've been perusing the docs, and I just have missed where it shows how 
to do these two things.  Can anyone shoot me a URL? 

Thanks!

Bob Caryl