SplineDrawer.h

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/******************************************************************************************************
 * (C) 2018 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 SPLINE_DRAWER_H
#define SPLINE_DRAWER_H
 
#include "SplinePair.h"
#include "Transformation.h"
#include <QVector>
 
class LineStyle;
class Spline;
 
enum SplineDrawerOperation {
  SPLINE_DRAWER_ENUM_INVISIBLE_MOVE, // Move to final point in segment
  SPLINE_DRAWER_ENUM_VISIBLE_DRAW // Draw to final point in segment
};
 
typedef QVector<SplineDrawerOperation> SegmentOperations;

class SplineDrawer
{
  // For unit testing
  friend class TestSplineDrawer;
  
 public:
  SplineDrawer(const Transformation &transformation);

  void bindToSpline (const LineStyle &lineStyle,
                     int numSegments,
                     const Spline &spline);

  bool segmentIsMultiValued (const Spline &spline,
                             int numSegments,
                             int segment) const;

  SplineDrawerOperation segmentOperation (int segment) const;
 
private:
  SplineDrawer();
 
  const Transformation m_transformation;
 
  SegmentOperations m_segmentOperations;
};
 
#endif // SPLINE_DRAWER_H