6 files changed, 40 insertions, 2 deletions
diff --git a/libs/ardour/ardour/automatable.h b/libs/ardour/ardour/automatable.h
index c9e900e6a9..1abfb4faf1 100644
--- a/libs/ardour/ardour/automatable.h
+++ b/libs/ardour/ardour/automatable.h
@@ -63,6 +63,7 @@ public:
 	virtual void transport_stopped (framepos_t now);
 
 	virtual std::string describe_parameter(Evoral::Parameter param);
+        virtual std::string value_as_string (boost::shared_ptr<AutomationControl>) const;
 
 	AutoState get_parameter_automation_state (Evoral::Parameter param);
 	virtual void set_parameter_automation_state (Evoral::Parameter param, AutoState);
diff --git a/libs/ardour/ardour/pannable.h b/libs/ardour/ardour/pannable.h
index dff64cec4b..3dc4ccb8fd 100644
--- a/libs/ardour/ardour/pannable.h
+++ b/libs/ardour/ardour/pannable.h
@@ -65,6 +65,8 @@ struct Pannable : public PBD::Stateful, public Automatable, public SessionHandle
                 return ((_auto_state & Write) || ((_auto_state & Touch) && touching()));
         }
 
+        std::string value_as_string (boost::shared_ptr<AutomationControl>) const;
+
 	void start_touch (double when);
 	void stop_touch (bool mark, double when);
 	bool touching() const { return g_atomic_int_get (&_touching); }
diff --git a/libs/ardour/ardour/panner.h b/libs/ardour/ardour/panner.h
index f43be2dbbc..c26d1a6a2c 100644
--- a/libs/ardour/ardour/panner.h
+++ b/libs/ardour/ardour/panner.h
@@ -93,6 +93,7 @@ class Panner : public PBD::Stateful, public PBD::ScopedConnectionList
 
 	virtual std::set<Evoral::Parameter> what_can_be_automated() const;
         virtual std::string describe_parameter (Evoral::Parameter);
+        virtual std::string value_as_string (boost::shared_ptr<AutomationControl>) const;
 
 	bool touching() const;
 
diff --git a/libs/ardour/automatable.cc b/libs/ardour/automatable.cc
index 0d24135710..20dc910f61 100644
--- a/libs/ardour/automatable.cc
+++ b/libs/ardour/automatable.cc
@@ -492,3 +492,23 @@ Automatable::clear_controls ()
 	_control_connections.drop_connections ();
 	ControlSet::clear_controls ();
 }
+
+string
+Automatable::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+{
+	std::stringstream s;
+
+        /* this is a the default fallback for this virtual method. Derived Automatables
+           are free to override this to display the values of their parameters/controls
+           in different ways.
+        */
+
+	// Hack to display CC as integer value, rather than double
+	if (ac->parameter().type() == MidiCCAutomation) {
+		s << lrint (ac->get_value());
+	} else {
+		s << std::fixed << std::setprecision(3) << ac->get_value();
+	}
+
+	return s.str ();
+}
diff --git a/libs/ardour/pannable.cc b/libs/ardour/pannable.cc
index 4243ab45df..1e2d5f5594 100644
--- a/libs/ardour/pannable.cc
+++ b/libs/ardour/pannable.cc
@@ -23,9 +23,11 @@
 #include "ardour/automation_control.h"
 #include "ardour/automation_list.h"
 #include "ardour/pannable.h"
+#include "ardour/panner.h"
 #include "ardour/pan_controllable.h"
 #include "ardour/session.h"
 
+using namespace std;
 using namespace PBD;
 using namespace ARDOUR;
 
@@ -245,6 +247,12 @@ Pannable::set_state (const XMLNode& root, int /*version - not used*/)
         return 0;
 }
 
+string 
+Pannable::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+{
+        if (_panner) {
+                return _panner->value_as_string (ac);
+        } 
 
-
-        
+        return Automatable::value_as_string (ac);
+}
diff --git a/libs/ardour/panner.cc b/libs/ardour/panner.cc
index bfee68a342..1cb5e310aa 100644
--- a/libs/ardour/panner.cc
+++ b/libs/ardour/panner.cc
@@ -161,3 +161,9 @@ Panner::describe_parameter (Evoral::Parameter p)
 {
         return _pannable->describe_parameter (p);
 }
+
+string 
+Panner::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+{
+        return _pannable->value_as_string (ac);
+}