import pygtk
pygtk.require("2.0")
import gtk

items = ['a', 'b', 'c', 'd']

def callback(*params):
    print params

model = gtk.ListStore(str)
model.connect("rows-reordered", callback)
#model.connect("row-changed", callback)
for i in items:
    model.append((i,))

w = gtk.Window()
w.connect("destroy", gtk.main_quit)
v = gtk.TreeView(model)
v.set_size_request(300, 200)
v.set_reorderable(True)
c = gtk.TreeViewColumn("File", gtk.CellRendererText(), text=0)
v.append_column(c)

w.add(v)
w.show_all()
gtk.main()