set_selection_function

["Michael Comperchio" <mcmprch gmail com>]

m having a problem with ListView.I would like to be able to get at a
selection before it changes to see if I need to update a database
table. connecting to signal_changed() gets me access to the TreeView
row that the ListView is going to display, but with no access to the
ListView row that was displayed.( Make Sense? ). So, I found this
set_selection_function method that gets called before the selection
actually changes. 

void Gtk::TreeSelection::set_select_function ( const SlotSelect&  slot )

Great I says.Except that I don't seem to have a clue how to define the
function to be called. When I read the documentation it says that the
function needs to be

typedef sigc::slot<bool, const Glib::RefPtr<TreeModel>&, const TreeModel::Path&, bool> Gtk::TreeSelection::SlotSelect

I'm okay with STL type stuff, but I'm having a hard time figuring out just what my function definition should look like ( and the compiler is having a hard time with all the defferent permutations  of function definition I've tried)

I just nead it to call an on_leave () function before the selection changes so I can change some data that may/ maynot have been modified elsewhere on the screen....

thanks!

Michael S. Comperchio
332 South Main St.
Torrington, CT 06790
860 485 8488
mcmprch yahoo com