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diff --git a/kpovmodeler/pmdatachangecommand.h b/kpovmodeler/pmdatachangecommand.h
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+++ b/kpovmodeler/pmdatachangecommand.h
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+//-*-C++-*-
+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2000-2001 by Andreas Zehender
+    email                : zehender@kde.org
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  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.                                   *
+*                                                                        *
+**************************************************************************/
+
+
+#ifndef PMDATACHANGECOMMAND_H
+#define PMDATACHANGECOMMAND_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "pmcommand.h"
+
+class PMMemento;
+
+/**
+ * Command that stores undo information for object changes
+ *
+ * Let an object create a @ref PMMemento, change the objects data, take the
+ * memento and create a PMDataChangeCommand with this memento.
+ *
+ * Then execute the command. The object will not be changed again!
+ */
+class PMDataChangeCommand : public PMCommand
+{
+public:
+   /**
+    * Creates a PMDataChangeCommand for the memento
+    */
+   PMDataChangeCommand( PMMemento* memento );
+   /**
+    * Deletes the command. The memento will be deleted.
+    */
+   virtual ~PMDataChangeCommand( );
+protected:
+   /**
+    * Executes the command
+    */
+   virtual void execute( PMCommandManager* theManager );
+   /**
+    * Undo the command
+    */
+   virtual void undo( PMCommandManager* theManager );
+   
+private:
+   void signalChanges( PMCommandManager* theManager, PMMemento* memento );
+   PMMemento* m_pNewState;
+   PMMemento* m_pOldState;
+   bool m_executed;
+   bool m_unexecuted;
+};
+
+#endif