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// -*- c-basic-offset: 4 -*-

    A sequencer and musical notation editor.

    This program is Copyright 2000-2006
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <bownie@bownie.com>

    The moral right of the authors to claim authorship of this work
    has been asserted.

    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 <qrect.h>
#include <qobject.h>
#include <qguardedptr.h>

#include "Event.h" // for Rosegarden::timeT

namespace Rosegarden { class SnapGrid; }

class _CompositionItem : public QObject {
    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(); }

    mutable QRect m_savedRect;

typedef QGuardedPtr<_CompositionItem> CompositionItem;
bool operator<(const CompositionItem&, const CompositionItem&);


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