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diff --git a/src/gui/editors/matrix/MatrixVLayout.h b/src/gui/editors/matrix/MatrixVLayout.h
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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   <glaurent@telegraph-road.org>,
+        Chris Cannam        <cannam@all-day-breakfast.com>,
+        Richard Bown        <richard.bown@ferventsoftware.com>
+
+    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.
+*/
+
+#ifndef _RG_MATRIXVLAYOUT_H_
+#define _RG_MATRIXVLAYOUT_H_
+
+#include "base/LayoutEngine.h"
+#include "base/Event.h"
+
+
+
+
+namespace Rosegarden
+{
+
+class Staff;
+
+
+class MatrixVLayout : public VerticalLayoutEngine
+{
+public:
+    MatrixVLayout();
+
+    virtual ~MatrixVLayout();
+
+    /**
+     * Resets internal data stores for all staffs
+     */
+    virtual void reset();
+
+    /**
+     * Resets internal data stores for a specific staff
+     */
+    virtual void resetStaff(Staff &staff,
+                            timeT = 0,
+                            timeT = 0);
+
+    /**
+     * Precomputes layout data for a single staff, updating any
+     * internal data stores associated with that staff and updating
+     * any layout-related properties in the events on the staff's
+     * segment.
+     */
+    virtual void scanStaff(Staff &staff,
+                           timeT = 0,
+                           timeT = 0);
+
+    /**
+     * Computes any layout data that may depend on the results of
+     * scanning more than one staff.  This may mean doing most of
+     * the layout (likely for horizontal layout) or nothing at all
+     * (likely for vertical layout).
+     */
+    virtual void finishLayout(timeT = 0,
+                              timeT = 0);
+
+    static const int minMIDIPitch;
+    static const int maxMIDIPitch;
+
+protected:
+    //--------------- Data members ---------------------------------
+
+
+};
+
+
+}
+
+#endif