* lily/ various: Introduce stream events of types Prepare,

[lilypond.git] / lily / include / engraver-group.hh

diff --git a/lily/include/engraver-group.hh b/lily/include/engraver-group.hh
index d1df4cffb37c39008cb27d295c8289768ecbab72..938fde04923ed41ed11e9ee70f54433f384cff3f 100644 (file)
--- a/lily/include/engraver-group.hh
+++ b/lily/include/engraver-group.hh
@@ -17,12 +17,15 @@ class Engraver_group : public virtual Translator_group
 protected:
   vector<Grob_info> announce_infos_;
   Drul_array<SCM> acknowledge_hash_table_drul_;
-
+  DECLARE_LISTENER (override);
+  DECLARE_LISTENER (revert);
 public:
   VIRTUAL_COPY_CONSTRUCTOR (Translator_group, Engraver_group);
   Engraver_group ();
   virtual void derived_mark () const;
   void do_announces ();
+  virtual void connect_to_context (Context *c);
+  virtual void disconnect_from_context ();
   virtual void announce_grob (Grob_info);
   int pending_grob_count () const;
 private: