CentipedeSegmentAbstract.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_SEGMENT_ABSTRACT_H
#define CENTIPEDE_SEGMENT_ABSTRACT_H
 
#include "DocumentModelGuideline.h"
#include <QObject>
#include <QPointF>
#include "Transformation.h"
 
class QGraphicsItem;

enum IntersectionType {
  INTERSECTION_LOW,    
  INTERSECTION_CENTER, 
  INTERSECTION_HIGH    
};

class CentipedeSegmentAbstract : public QObject
{
  Q_OBJECT;
 
public:
  CentipedeSegmentAbstract(const DocumentModelGuideline &modelGuideline,
                           const Transformation &transformation,
                           const QPointF &posClickScreen);
  virtual ~CentipedeSegmentAbstract ();

  virtual double distanceToClosestEndpoint (const QPointF &posScreen) const = 0;

  virtual void updateRadius (double radius) = 0;
  
protected:

  double closestAngleToCentralAngle (double angleCenter,
                                     double angleOld) const;

  const DocumentModelGuideline &modelGuideline () const;

  QPointF posClickScreen () const;
  
  Transformation transformation() const;
  
private:
  CentipedeSegmentAbstract();
 
  DocumentModelGuideline m_modelGuideline;
  Transformation m_transformation;
  QPointF m_posClickScreen;
 
};
 
#endif // CENTIPEDE_SEGMENT_ABSTRACT_H