Fix restoration of MementoCommand<Crossfade>. Fixes #3418.

git-svn-id: svn://localhost/ardour2/branches/3.0@7771 d708f5d6-7413-0410-9779-e7cbd77b26cf

3 files changed, 9 insertions, 0 deletions

diff --git a/libs/ardour/ardour/audioplaylist.h b/libs/ardour/ardour/audioplaylist.h
index 39a19d8ed1..edf5008283 100644
--- a/libs/ardour/ardour/audioplaylist.h
+++ b/libs/ardour/ardour/audioplaylist.h
@@ -91,6 +91,8 @@ public:
 
 	void update (const CrossfadeListProperty::ChangeRecord &);
 
+	boost::shared_ptr<Crossfade> find_crossfade (const PBD::ID &) const;
+	
     protected:
 
 	/* playlist "callbacks" */
diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index feea056ac3..67638cf15e 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -50,6 +50,7 @@ namespace ARDOUR  {
 class Session;
 class Region;
 class Playlist;
+class Crossfade;	
 
 namespace Properties {
         /* fake the type, since regions are handled by SequenceProperty which doesn't
@@ -210,6 +211,10 @@ public:
 
 	void set_explicit_relayering (bool e);
 
+	virtual boost::shared_ptr<Crossfade> find_crossfade (const PBD::ID &) const {
+		return boost::shared_ptr<Crossfade> ();
+	}
+
   protected:
 	friend class Session;
 
diff --git a/libs/ardour/ardour/session_playlists.h b/libs/ardour/ardour/session_playlists.h
index 1c83a312a5..4ca67bdee8 100644
--- a/libs/ardour/ardour/session_playlists.h
+++ b/libs/ardour/ardour/session_playlists.h
@@ -41,6 +41,7 @@ class Playlist;
 class Region;
 class Source;
 class Session;
+class Crossfade;	
 	
 class SessionPlaylists : public PBD::ScopedConnectionList
 {
@@ -54,6 +55,7 @@ public:
 	void get (std::vector<boost::shared_ptr<Playlist> >&);
 	void unassigned (std::list<boost::shared_ptr<Playlist> > & list);
         void destroy_region (boost::shared_ptr<Region>);
+	boost::shared_ptr<Crossfade> find_crossfade (const PBD::ID &);
 
 private:
 	friend class Session;