arrowitem.h

/***************************************************************************
                          arrowitem.h  -  description
                             -------------------
    begin                : Sat Apr 14 2001
    copyright            : (C) 2015 by Werner Stille
    email                : stille@uni-freiburg.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef ARROWITEM_H
#define ARROWITEM_H

#include <QAbstractGraphicsShapeItem>
#include <QPolygonF>
#include "vectoritem.h"

class QTransform;

class KDE_EXPORT ArrowItem :
 public VectorItem, public QAbstractGraphicsShapeItem
{
public:
  enum {Type = UserType + Arrow
  };
  ArrowItem(double x0 = 0, double y0 = 0, unsigned color = 0,
            QGraphicsItem* parent = 0, double length = 1, bool visible = true,
            bool doubleHeaded = false, double relSize = 1, double dir = 0);
  ArrowItem(const ArrowItem& a);
  ArrowItem(const KConfigGroup* plo, unsigned color = 0,
            QGraphicsItem* parent = 0);
  virtual ~ArrowItem();
  virtual QRectF boundingRect() const;
  inline bool doubleHeaded() const { return m_doubleHeaded; };
  virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option,
                     QWidget* widget = 0);
  QPixmap pixmap() const;
  inline void setDoubleHeaded(bool b) { m_doubleHeaded = b; };
  void setHead();
  void setPenWidth();
  void setProperties(const QTransform& m);
  virtual int type() const { return Type; };
  void update();
  void writePlo(KConfigGroup* plo) const;

protected:
  virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent* event);
  void setProperties();
  bool m_doubleHeaded;
  double l2, lHead;
  QPolygonF head;
};

#endif