Undo::empty() also returns empty if the list only contains DoNothings

removed unused, unimplemented function

2 files changed, 14 insertions, 1 deletions

diff --git a/muse2/muse/undo.cpp b/muse2/muse/undo.cpp
index c0191362..63911fcf 100644
--- a/muse2/muse/undo.cpp
+++ b/muse2/muse/undo.cpp
@@ -775,6 +775,7 @@ void Song::doRedo2()
 
 UndoOp::UndoOp()
 {
+  type=UndoOp::DoNothing;
 }
 
 UndoOp::UndoOp(UndoType type_)
@@ -1073,3 +1074,14 @@ void Song::doRedo3()
       dirty = true;
       }
 
+
+bool Undo::empty() const
+{
+  if (std::list<UndoOp>::empty()) return true;
+  
+  for (const_iterator it=begin(); it!=end(); it++)
+    if (it->type!=UndoOp::DoNothing)
+      return false;
+  
+  return true;
+}
diff --git a/muse2/muse/undo.h b/muse2/muse/undo.h
index 5dca82b6..f2a523cc 100644
--- a/muse2/muse/undo.h
+++ b/muse2/muse/undo.h
@@ -119,7 +119,8 @@ struct UndoOp {
       };
 
 class Undo : public std::list<UndoOp> {
-      void undoOp(UndoOp::UndoType, int data);
+   public:
+      bool empty() const;
       };
 
 typedef Undo::iterator iUndoOp;