parfunitem.h

/***************************************************************************
                          parfunitem.h  -  description
                             -------------------
 
    This file is a part of kpl - a program for graphical presentation of
    data sets and functions.
 
    begin                : Sun Aug 29 1999
    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 PARFUNITEM_H
#define PARFUNITEM_H
 
#include "funitem.h"

class Q_DECL_EXPORT ParFunItem : public FunItem
{
public:
  enum {
    Type = UserType + ParFunction
  };
  ParFunItem(const QUrl& urlX = QUrl(), const QString& nameX = QString(),
             const QUrl& urlY = QUrl(), const QString& nameY = QString(),
             unsigned color = 0, Symbol symbol = SolidLine, double fx = 1,
             double fy = 1, QGraphicsItem* parent = nullptr, double tMin = 0,
             double tMax = 0, double deltaT = 0, bool visible = true,
             FillStyle fillStyle = NoBrush, double xOffset = 0,
             double yOffset = 0, double relSize = 1);
  ParFunItem(const ParFunItem& a);
  ParFunItem(const KConfigGroup* plo, const QUrl& urlPlo, unsigned color = 0,
             Symbol symbol = SolidLine, QGraphicsItem* parent = nullptr);
  virtual ~ParFunItem();
  virtual QRectF boundingRect() const override;
  int calcTable() const;
  void exponent(int& expX, int& expY, double& fx, double& fy) const;
  void exportTable(QTextStream& stream, char separator, char format,
                   int precision) const;
  double (*funcX)(double, const double*);
  inline const QLibrary* libX() const { return m_libX; };
  void limits(double& xMin, double& xMax, double& yMin, double& yMax) const;
  inline QString nameX() const { return m_nameX; };
  virtual void paint(QPainter* painter, const QStyleOptionGraphicsItem* option,
                     QWidget* widget = nullptr) override;
  inline double* parX() { return m_parX; };
  void setDashOffset();
  bool setFuncX(const QUrl& url, const QString& name);
  virtual void setPar(int i, double value, bool yFun) override;
  virtual int type() const override { return Type; };
  inline const QUrl& urlX() const { return m_urlX; };
  void writePlo(KConfigGroup* plo, const QUrl& urlPlo, bool absolute,
                char format, int precision) const;
  double* xValues() const;
 
protected:
  void init();
  void paintCond(QPainter* painter) const;
  void unloadX();
  mutable double (*funcXo)(double, const double*);
  double m_parX[NumParMax];
  mutable double parXo[NumParMax];
  mutable QVector<double> m_xValues;
  QString m_nameX;
  QUrl m_urlX;
  QLibrary* m_libX;
};
 
#endif