qwt3d_autoscaler.h

#ifndef QWT3D_AUTOSCALER_H
#define QWT3D_AUTOSCALER_H
 
#include <vector>
#include "qwt3d_global.h"
#include "qwt3d_autoptr.h"
 
namespace Qwt3D
{
 
class QWT3D_EXPORT AutoScaler
{
    friend class ClonePtr< AutoScaler >;
 
protected:
    virtual AutoScaler* clone() const                                               = 0;
    virtual int execute(double& a, double& b, double start, double stop, int ivals) = 0;
    virtual ~AutoScaler()
    {
    }
 
private:
    void destroy() const
    {
        delete this;
    }
};
 
class QWT3D_EXPORT LinearAutoScaler : public AutoScaler
{
    friend class LinearScale;
 
protected:
    QWT_DECLARE_PRIVATE(LinearAutoScaler)
 
    LinearAutoScaler();
    explicit LinearAutoScaler(std::vector< double >& mantisses);
    ~LinearAutoScaler() override;
    AutoScaler* clone() const override;
    int execute(double& a, double& b, double start, double stop, int ivals) override;
 
    // Copies state from another LinearAutoScaler (used by LinearScale::clone)
    void copyStateFrom(const LinearAutoScaler& other);
 
private:
    void init(double start, double stop, int ivals);
    double anchorvalue(double start, double mantisse, int exponent);
    int segments(int& l_intervals, int& r_intervals, double start, double stop, double anchor, double mantissa, int exponent);
};
 
}  // ns
 
#endif