Upsilon/apps/shared/curve_view_range.h

#ifndef SHARED_CURVE_VIEW_RANGE_H
#define SHARED_CURVE_VIEW_RANGE_H

#include <stdint.h>

namespace Shared {

class CurveViewRange {
public:
  enum class Axis {
    X,
    Y
  };
  virtual uint32_t rangeChecksum();

  virtual float xMin() = 0;
  virtual float xMax() = 0;
  virtual float yMin() = 0;
  virtual float yMax() = 0;
  virtual float xGridUnit() = 0;
  virtual float yGridUnit();
  float computeGridUnit(Axis axis, float range);
  constexpr static float k_maxNumberOfXGridUnits = 18.0f;
  constexpr static float k_maxNumberOfYGridUnits = 13.0f;
private:
  constexpr static float k_minNumberOfXGridUnits = 7.0f;
  constexpr static float k_minNumberOfYGridUnits = 5.0f;
  /* The grid units is constrained to be a number of type: k*10^n with k = 1,2 or 5
   * and n a relative integer. The choice of x and y grid units depend on the
   * grid range.*/
  constexpr static float k_smallGridUnitMantissa = 1.0f;
  constexpr static float k_mediumGridUnitMantissa = 2.0f;
  constexpr static float k_largeGridUnitMantissa = 5.0f;
};

}

#endif