From a5386f8d59d595e930c1d179e0eb0fabc60a7c84 Mon Sep 17 00:00:00 2001
From: Hans Fugal <hans@fugal.net>
Date: Fri, 30 Jun 2006 17:24:16 +0000
Subject: [PATCH]  r155@gandalf:  fugalh | 2006-06-30 11:21:45 -0600 
 MementoCommand - for the lazy at heart

git-svn-id: svn://localhost/ardour2/branches/undo@661 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/pbd3/pbd/memento_command.h | 54 +++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 libs/pbd3/pbd/memento_command.h

diff --git a/libs/pbd3/pbd/memento_command.h b/libs/pbd3/pbd/memento_command.h
new file mode 100644
index 0000000000..6ecacf6d67
--- /dev/null
+++ b/libs/pbd3/pbd/memento_command.h
@@ -0,0 +1,54 @@
+/* 
+   Copyright (C) 2006 Hans Fugal & Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: /local/undo/libs/pbd3/pbd/undo.h 132 2006-06-29T18:45:16.609763Z fugalh  $
+*/
+
+#ifndef __lib_pbd_memento_command_h__
+#define __lib_pbd_memento_command_h__
+
+#include <pbd/command.h>
+#include <sigc++/slot.h>
+
+// TODO: make a macro to make constructing this even easier
+template <class obj_T, class mem_T>
+class MementoCommand : public Command
+{
+    public:
+        MementoCommand(obj_T obj, 
+                       sigc::slot<void> action,
+                       std::string key
+                       std::list<Serializable *> args
+                       ) 
+            : obj(obj), action(action), key(key), args(args), memento(obj.get_memento()) {}
+        void operator() () { action(); }
+        void undo() { obj.set_memento(memento); }
+        virtual XMLNode &serialize() 
+        {
+            // obj.id
+            // key
+            // args
+        }
+    protected:
+        obj_T &obj;
+        mem_T memento;
+        sigc::slot<void> action;
+        std::string key;
+        std::list<Serializable*> args;
+};
+
+#endif // __lib_pbd_memento_h__