From 2bf3ed423f7aecdaabf5fbb078d9e2f20d26880c Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 16 Nov 2006 18:42:48 +0000
Subject: track naming patch from brian; slightly modified F11-bug workaround
 from brian; undo/redo items in edit menu now show operation to be
 undone/redone; canvas allocations now handled by an idle handler; region
 views respond to changes in fade/in/out curves ; undo/redo possible for some
 fade in/out operations; automation tracks extend to max_frames

git-svn-id: svn://localhost/ardour2/trunk@1134 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/pbd/pbd/undo.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'libs/pbd/pbd/undo.h')

diff --git a/libs/pbd/pbd/undo.h b/libs/pbd/pbd/undo.h
index 277c41c2af..eb46750e4f 100644
--- a/libs/pbd/pbd/undo.h
+++ b/libs/pbd/pbd/undo.h
@@ -74,7 +74,7 @@ class UndoTransaction : public Command
 	friend void command_death (UndoTransaction*, Command *);
 };
 
-class UndoHistory
+class UndoHistory : public sigc::trackable
 {
   public:
 	UndoHistory();
@@ -97,6 +97,8 @@ class UndoHistory
         XMLNode &get_state();
         void save_state();
 
+	sigc::signal<void> Changed;
+
   private:
 	bool _clearing;
 	std::list<UndoTransaction*> UndoList;
-- 
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