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diff --git a/src/gui/rulers/RawNoteRuler.h b/src/gui/rulers/RawNoteRuler.h
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+++ b/src/gui/rulers/RawNoteRuler.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_RAWNOTERULER_H_
+#define _RG_RAWNOTERULER_H_
+
+#include "base/Segment.h"
+#include <qsize.h>
+#include <qwidget.h>
+#include <utility>
+#include <vector>
+#include "base/Event.h"
+
+
+class QPaintEvent;
+class QPainter;
+
+
+namespace Rosegarden
+{
+
+class RulerScale;
+class DefaultVelocityColour;
+
+
+/**
+ * RawNoteRuler is a ruler that shows in a vaguely matrix-like fashion
+ * when notes start and end, for use with a notation view that can't
+ * otherwise show this relatively precise unquantized information.
+ * It has no editing function (yet?)
+ */
+
+class RawNoteRuler : public QWidget
+{
+    Q_OBJECT
+
+public:
+    RawNoteRuler(RulerScale *rulerScale,
+                 Segment *segment,
+                 double xorigin = 0.0,
+                 int height = 0,
+                 QWidget* parent = 0,
+                 const char *name = 0);
+
+    ~RawNoteRuler();
+
+    void setCurrentSegment(Segment *segment) {
+        m_segment = segment;
+    }
+
+    virtual QSize sizeHint() const;
+    virtual QSize minimumSizeHint() const;
+
+    void setMinimumWidth(int width) { m_width = width; }
+
+public slots:
+    void slotScrollHoriz(int x);
+
+protected:
+    virtual void paintEvent(QPaintEvent*);
+
+private:
+    double m_xorigin;
+    int  m_height;
+    int  m_currentXOffset;
+    int  m_width;
+
+    Segment *m_segment;
+    RulerScale *m_rulerScale;
+
+    struct EventTreeNode
+    {
+        typedef std::vector<EventTreeNode *> NodeList;
+        
+        EventTreeNode(Segment::iterator n) : node(n) { }
+        ~EventTreeNode() {
+            for (NodeList::iterator i = children.begin();
+                 i != children.end(); ++i) {
+                delete *i;
+            }
+        }
+
+        int getDepth();
+        int getChildrenAboveOrBelow(bool below = false, int pitch = -1);
+        
+        Segment::iterator node;
+        NodeList children;
+    };
+
+    std::pair<timeT, timeT> getExtents(Segment::iterator);
+    Segment::iterator addChildren(Segment *, Segment::iterator, timeT, EventTreeNode *);
+    void dumpSubtree(EventTreeNode *, int);
+    void dumpForest(std::vector<EventTreeNode *> *);
+    void buildForest(Segment *, Segment::iterator, Segment::iterator);
+
+    void drawNode(QPainter &, DefaultVelocityColour &, EventTreeNode *,
+                  double height, double yorigin);
+
+    // needs to be class with dtor &c and containing above methods
+    EventTreeNode::NodeList m_forest;
+};
+
+
+}
+
+#endif