CentipedeDebugPolar.h

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/******************************************************************************************************
 * (C) 2020 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef CENTIPEDE_DEBUG_POLAR_H
#define CENTIPEDE_DEBUG_POLAR_H
 
#include <QPointF>
 
class DocumentModelCoords;
class QColor;
class QGraphicsEllipseItem;
class QGraphicsScene;
class QLineF;
class Transformation;

class CentipedeDebugPolar
{
public:
  CentipedeDebugPolar();

  CentipedeDebugPolar(const QPointF &posScreenParallelogramTL,
                      const QPointF &posScreenParallelogramTR,
                      const QPointF &posScreenParallelogramBL,
                      const QPointF &posScreenParallelogramBR,
                      double angleGraphAxisFromScreenAxis,
                      double angleEllipseFromMajorAxis,
                      double aAligned,
                      double bAligned,
                      double radius);

  CentipedeDebugPolar (const CentipedeDebugPolar &other);

  CentipedeDebugPolar &operator= (const CentipedeDebugPolar &other);
 
  virtual ~CentipedeDebugPolar ();

  double aAligned () const;

  double angleEllipseFromMajorAxis () const;

  double angleGraphAxisFromScreenAxis () const;

  double bAligned () const;

  void display (QGraphicsScene &scene,
                const DocumentModelCoords &modelCoords,
                const Transformation &transformation);

  void dumpEllipseGraphicsItem (const QString &callerMethod,
                                const QGraphicsEllipseItem *ellipse) const;

  QPointF posScreenParallelogramBL () const;

  QPointF posScreenParallelogramBR () const;

  QPointF posScreenParallelogramTL () const;

  QPointF posScreenParallelogramTR () const;
  
  double radius () const;
 
private:

  void addToLegend (QGraphicsScene &scene,
                    const QString &entry,
                    const QColor &color);

  void displayTics (QGraphicsScene &scene,
                    const Transformation &transformation,
                    const QPointF &posOriginScreen,
                    const QPointF &posAAxisScreen,
                    const QColor &colorGraphCoordinates,
                    const QColor &colorScreenCoordinates);

  QLineF portionOfLineLast (const QLineF &line,
                            int degrees,
                            int degreesBetweenHighlights) const;

  QLineF portionOfLineNext (const QLineF &line,
                            int degrees,
                            int degreesBetweenHighlights) const;
 
  QPointF m_posScreenParallelogramTL;
  QPointF m_posScreenParallelogramTR;
  QPointF m_posScreenParallelogramBL;
  QPointF m_posScreenParallelogramBR;
  double m_angleGraphAxisFromScreenAxis;
  double m_angleEllipseFromMajorAxis;
  double m_aAligned;
  double m_bAligned;
  double m_radius;
  int m_legendYPos; // Positions legend entries
};
 
#endif // CENTIPEDE_DEBUG_POLAR_H