http://codereview.appspot.com/5498079/diff/1/demos/launcher-gtk.py File demos/launcher-gtk.py (right): http://codereview.appspot.com/5498079/diff/1/demos/launcher-gtk.py#newcode6 demos/launcher-gtk.py:6: GtkClutter.init([]) # Must be initialized before importing those: Otherwise drag and dropping the map, using the scroll to zoom does not work. http://codereview.appspot.com/5498079/diff/1/demos/launcher-gtk.py#newcode48 demos/launcher-gtk.py:48: self.path_layer.add_node(Champlain.Coordinate.new_full(45.4095, Would it be possible to use Champlain.Coordinate(45, -73) instead of using a constructor ? It would made the binding more pythonic. http://codereview.appspot.com/5498079/diff/1/demos/launcher-gtk.py#newcode144 demos/launcher-gtk.py:144: #self.view.set_property("map-source", source) I think Jiri told me that it is fixed with the new version but I havent compiled it.