+void
+MonoPanner::pannable_handler ()
+{
+ panvalue_connections.drop_connections();
+ position_control = _panner->pannable()->pan_azimuth_control;
+ position_binder.set_controllable(position_control);
+ position_control->Changed.connect (panvalue_connections, invalidator(*this), boost::bind (&MonoPanner::value_change, this), gui_context());
+ queue_draw ();
+}
+