treeview with compact indentation?

[Allin Cottrell <cottrell wfu edu>]

I wonder if there's a way to produce a more compact layout for a
treeview with expanders?  I'd like this for a case where the
treeview is in a left-hand pane, alongside stuff that the tree
represents.

I mean, the default looks something like this, with "heading 1"
expanded:

heading 1
           item 1
           item 2

But the effect I'm looking for is like:

heading 1
  item 1
  item 2

with the children tucked under their parent.

I noticed the existence of gtk_tree_view_set_level_indentation(),
but this doesn't accept a negative argument.

Thanks for any suggestions.

-- 
Allin Cottrell
Department of Economics
Wake Forest University