Gtk::ScrolledWindow doesn't scroll TreeView object added to it in gtkmm2
versions 2.0 and 2.1. In the example source code, src/MainWindow_ui.cpp,
TreeView is added with "scrollwin_ptr->add (m_tree_view);" The documentation 
doesn't state any other actions required beyound calling add() to make 
ScrolledWindow scroll TreeView when its TreeSelection::select(path) is
called to highlight next row which is invisible. The expected behaviour at
this point for ScrolledWindow is to adjust TreeView so that the newly
selected row is aligned in the center of the visible window.
This is how it used to work with CList and ScrolledWindow in gtkmm1.2.

Example source code can be found here:
http://users.erols.com/volotsky/vlg/gtkmm/TreeViewTest-1.1.tar.gz.
Package requires gnomemm2 to be installed. Compile and start TreeViewTest.
Clicking 'Down' button repeatedly will select rows 1 through 7. On the 8th
click, row 8 is selected, but ScrolledWindow does not adjust the view to
make it visible. Nor does it scroll the 8th row to be centered in the
middle of the window.