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diff --git a/src/gui/editors/segment/segmentcanvas/CompositionItem.h b/src/gui/editors/segment/segmentcanvas/CompositionItem.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   <[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.
+*/
+
+#ifndef _RG_COMPOSITIONITEM_H_
+#define _RG_COMPOSITIONITEM_H_
+
+#include <qguardedptr.h>
+#include <qobject.h>
+#include <qrect.h>
+
+
+namespace Rosegarden
+{
+
+class _CompositionItem : public QObject {
+public:
+    virtual bool isRepeating() const = 0;
+    virtual QRect rect() const = 0;
+    virtual void moveBy(int x, int y) = 0;
+    virtual void moveTo(int x, int y) = 0;
+    virtual void setX(int x) = 0;
+    virtual void setY(int y) = 0;
+    virtual void setZ(unsigned int z) = 0;
+    virtual int  x() = 0;
+    virtual int  y() = 0;
+    virtual unsigned int  z() = 0;
+    virtual void setWidth(int w) = 0;
+
+    // used by itemcontainer
+    virtual long hashKey() = 0;
+
+    QRect savedRect() const   { return m_savedRect; }
+    void saveRect() const     { m_savedRect = rect(); }
+
+protected:
+    mutable QRect m_savedRect;
+};
+
+typedef QGuardedPtr<_CompositionItem> CompositionItem;
+bool operator<(const CompositionItem&, const CompositionItem&);
+
+
+}
+
+#endif