X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fpbd%2Fstateful_diff_command.h;h=2a213d7a17e7fcea73be991cf6d3316e2d921727;hb=a1a8794dadc0ab972f441481594b53117df1ca92;hp=cab1ae40cfb742554034bedfbbdaf5430793aeb0;hpb=db8b575c30845bafc34b87bacd52129c95d1c478;p=ardour.git

diff --git a/libs/pbd/pbd/stateful_diff_command.h b/libs/pbd/pbd/stateful_diff_command.h
index cab1ae40cf..2a213d7a17 100644
--- a/libs/pbd/pbd/stateful_diff_command.h
+++ b/libs/pbd/pbd/stateful_diff_command.h
@@ -27,7 +27,7 @@
 namespace PBD
 {
 
-class Stateful;	
+class StatefulDestructible;	
 class PropertyList;
 
 /** A Command which stores its action as the differences between the before and after
@@ -36,19 +36,20 @@ class PropertyList;
 class StatefulDiffCommand : public Command
 {
 public:
-	StatefulDiffCommand (boost::shared_ptr<Stateful>);
-	StatefulDiffCommand (boost::shared_ptr<Stateful>, XMLNode const &);
+	StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>);
+	StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>, XMLNode const &);
 	~StatefulDiffCommand ();
 
 	void operator() ();
 	void undo ();
-
+        
 	XMLNode& get_state ();
 
+	bool empty () const;
+
 private:
 	boost::weak_ptr<Stateful> _object; ///< the object in question
-        PBD::PropertyList* _before; ///< its (partial) state before the command
-        PBD::PropertyList* _after;  ///< its (partial) state after the operation
+        PBD::PropertyList* _changes; ///< property changes to execute this command
 };
 
 };