+ boost::shared_ptr<ARDOUR::AutomationControl> ac = boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (c);
+ if (_printer && ac) {
+
+ _tooltip.set_tip (_tooltip_prefix + _printer->value_as_string (ac));
+ } else {
+ _tooltip.set_tip (_tooltip_prefix + c->get_user_string());
+ }