arrowitem.h

/***************************************************************************
                          arrowitem.h  -  description
                             -------------------
    begin                : Sat Apr 14 2001
    copyright            : (C) 2024 by Werner Stille
    email                : kpl@werner-stille.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 Q_DECL_EXPORT ArrowItem :
 public VectorItem, public QAbstractGraphicsShapeItem
{
public:
  enum {Type = UserType + Arrow
  };
  ArrowItem(double x0 = 0, double y0 = 0, unsigned color = 0,
            QGraphicsItem* parent = nullptr, double length = 1,
            bool visible = true, bool doubleHeaded = false,
            Symbol symbol = SolidLine,
            double relSize = 1, double dir = 0);
  ArrowItem(const ArrowItem& a);
  ArrowItem(const KConfigGroup* plo, unsigned color = 0,
            QGraphicsItem* parent = nullptr);
  virtual ~ArrowItem();
  virtual QRectF boundingRect() const override;
  inline bool doubleHeaded() const { return m_doubleHeaded; };
  virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option,
                     QWidget* widget = nullptr) override;
  QPixmap pixmap() const;
  inline void setDoubleHeaded(bool b) { m_doubleHeaded = b; };
  void setHead();
  void setPenWidth();
  void setProperties(const QTransform& m);
  inline void setSymbol(Symbol symbol) { m_symbol = symbol; };
  inline Symbol symbol() const { return m_symbol; };
  virtual int type() const override { return Type; };
  void update();
  void writePlo(KConfigGroup* plo) const;
 
protected:
  virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;
  void setProperties();
  bool m_doubleHeaded;
  Symbol m_symbol;
  double l2, lHead;
  QPolygonF head;
};
 
#endif