[gtkmm] TreeView Widget like Qt or Windows?

["Andreas B. Thun" <abt gmx de>]

Hi!

My TreeView column takes up too much space
because the children are not displayed under
the Roots, but beside.

Is there a possibility to show a
TreeView like this?:

+ Root-Name
  Child-Name
  Child-Name
+ Root-Name
  Child-Name


columns take up too much space
in standard TreeView (depends on length of Root):

> Root-Name_1
              Child-Name
              Child-Name
> Root-Name
              Child-Name



TIA,
Andi