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//=============================================================================
// MuseScore
// Music Composition & Notation
// $Id:$
//
// Copyright (C) 2010-2011 Werner Schweer
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2
// as published by the Free Software Foundation and appearing in
// the file LICENCE.GPL
//=============================================================================

#ifndef __STEM_H__
#define __STEM_H__

#include "element.h"

class Chord;
class QPainter;

//---------------------------------------------------------
// @@ Stem
/// Graphic representation of a note stem.
//---------------------------------------------------------

class Stem : public Element {
      Q_OBJECT

      QLineF line; // p1 is attached to note head
      qreal _userLen;
      qreal _len; // allways positive

   public:
      Stem(Score*);
      Stem &operator=(const Stem&);

      virtual Stem* clone() const { return new Stem(*this); }
      virtual ElementType type() const { return STEM; }
      virtual void draw(QPainter*) const;
      virtual bool isEditable() const { return true; }
      virtual void layout();
      virtual void spatiumChanged(qreal /*oldValue*/, qreal /*newValue*/);

      virtual void editDrag(const EditData&);
      virtual void updateGrips(int*, QRectF*) const;
      virtual void write(Xml& xml) const;
      virtual void read(const QDomElement& e);
      virtual void toDefault();
      virtual bool acceptDrop(MuseScoreView*, const QPointF&, Element*) const;
      virtual Element* drop(const DropData&);

      virtual QVariant getProperty(P_ID propertyId) const;
      virtual bool setProperty(P_ID propertyId, const QVariant&);

      Chord* chord() const { return (Chord*)parent(); }
      bool up() const;

      qreal userLen() const { return _userLen; }
      void setUserLen(qreal l) { _userLen = l; }

      QPointF hookPos() const;
      void setLen(qreal l);
      qreal len() const { return _len; }
      qreal stemLen() const;
      QPointF p2() const { return line.p2(); }
      };

#endif
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