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diff --git a/src/commands/matrix/MatrixModifyCommand.cpp b/src/commands/matrix/MatrixModifyCommand.cpp
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+++ b/src/commands/matrix/MatrixModifyCommand.cpp
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+ 
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+ 
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+ 
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+ 
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+
+#include "MatrixModifyCommand.h"
+
+#include "base/Event.h"
+#include <klocale.h>
+#include "base/NotationTypes.h"
+#include "base/Segment.h"
+#include "document/BasicCommand.h"
+
+
+namespace Rosegarden
+{
+
+MatrixModifyCommand::MatrixModifyCommand(Segment &segment,
+        Event *oldEvent,
+        Event *newEvent,
+        bool isMove,
+        bool normalize):
+        BasicCommand((isMove ? i18n("Move Note") : i18n("Modify Note")),
+                     segment,
+                     std::min(newEvent->getAbsoluteTime(),
+                              oldEvent->getAbsoluteTime()),
+                     std::max(oldEvent->getAbsoluteTime() +
+                              oldEvent->getDuration(),
+                              newEvent->getAbsoluteTime() +
+                              newEvent->getDuration()),
+                     true),
+        m_normalize(normalize),
+        m_oldEvent(oldEvent),
+        m_newEvent(newEvent)
+{}
+
+void MatrixModifyCommand::modifySegment()
+{
+    std::string eventType = m_oldEvent->getType();
+
+    if (eventType == Note::EventType) {
+
+        timeT normalizeStart = std::min(m_newEvent->getAbsoluteTime(),
+                                        m_oldEvent->getAbsoluteTime());
+
+        timeT normalizeEnd = std::max(m_newEvent->getAbsoluteTime() +
+                                      m_newEvent->getDuration(),
+                                      m_oldEvent->getAbsoluteTime() +
+                                      m_oldEvent->getDuration());
+
+        Segment &segment(getSegment());
+        segment.insert(m_newEvent);
+        segment.eraseSingle(m_oldEvent);
+
+        if (m_normalize) {
+            segment.normalizeRests(normalizeStart, normalizeEnd);
+        }
+    }
+}
+
+}