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diff --git a/src/gui/editors/matrix/MatrixVLayout.cpp b/src/gui/editors/matrix/MatrixVLayout.cpp
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+++ b/src/gui/editors/matrix/MatrixVLayout.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 "MatrixVLayout.h"
+#include "misc/Debug.h"
+
+#include "base/BaseProperties.h"
+#include "base/LayoutEngine.h"
+#include "base/Staff.h"
+#include "MatrixElement.h"
+#include "MatrixStaff.h"
+
+
+namespace Rosegarden
+{
+
+MatrixVLayout::MatrixVLayout()
+{}
+
+MatrixVLayout::~MatrixVLayout()
+{}
+
+void MatrixVLayout::reset()
+{}
+
+void MatrixVLayout::resetStaff(Staff&, timeT, timeT)
+{}
+
+void MatrixVLayout::scanStaff(Staff& staffBase,
+                              timeT startTime, timeT endTime)
+{
+    MatrixStaff& staff = dynamic_cast<MatrixStaff&>(staffBase);
+
+    using BaseProperties::PITCH;
+
+    MatrixElementList *notes = staff.getViewElementList();
+
+    MatrixElementList::iterator from = notes->begin();
+    MatrixElementList::iterator to = notes->end();
+    MatrixElementList::iterator i;
+
+    if (startTime != endTime) {
+        from = notes->findNearestTime(startTime);
+        if (from == notes->end())
+            from = notes->begin();
+        to = notes->findTime(endTime);
+    }
+
+    MATRIX_DEBUG << "MatrixVLayout::scanStaff : id = "
+    << staff.getId() << endl;
+
+
+    for (i = from; i != to; ++i) {
+
+        MatrixElement *el = dynamic_cast<MatrixElement*>((*i));
+
+        if (!el->isNote())
+            continue; // notes only
+
+        long pitch = 60;
+        el->event()->get
+        <Int>(PITCH, pitch);
+
+        int y = staff.getLayoutYForHeight(pitch) - staff.getElementHeight() / 2;
+
+        el->setLayoutY(y);
+        el->setHeight(staff.getElementHeight());
+    }
+
+}
+
+void MatrixVLayout::finishLayout(timeT, timeT)
+{}
+
+const int MatrixVLayout::minMIDIPitch = 0;
+const int MatrixVLayout::maxMIDIPitch = 127;
+
+}