Operations for linear or logarithmic (base 10) transformations. More...
#include <qwt_scale_map.h>
Public Types | |
enum | Type { Linear, Log10, Other } |
Public Member Functions | |
QwtScaleTransformation (Type type) | |
virtual | ~QwtScaleTransformation () |
virtual double | xForm (double x, double s1, double s2, double p1, double p2) const |
virtual double | invXForm (double x, double s1, double s2, double p1, double p2) const |
Type | type () const |
virtual QwtScaleTransformation * | copy () const |
Operations for linear or logarithmic (base 10) transformations.
QwtScaleTransformation::QwtScaleTransformation | ( | Type | type | ) |
Constructor for a linear transformation.
QwtScaleTransformation::~QwtScaleTransformation | ( | ) | [virtual] |
Destructor.
QwtScaleTransformation * QwtScaleTransformation::copy | ( | ) | const [virtual] |
Create a clone of the transformation.
double QwtScaleTransformation::invXForm | ( | double | p, | |
double | p1, | |||
double | p2, | |||
double | s1, | |||
double | s2 | |||
) | const [virtual] |
Transform a value from a linear to a logarithmic interval.
p | value related to the linear interval [p1, p2] | |
p1 | first border of linear interval | |
p2 | second border of linear interval | |
s1 | first border of logarithmic interval | |
s2 | second border of logarithmic interval |
QwtScaleTransformation::Type QwtScaleTransformation::type | ( | ) | const [inline] |
double QwtScaleTransformation::xForm | ( | double | s, | |
double | s1, | |||
double | s2, | |||
double | p1, | |||
double | p2 | |||
) | const [virtual] |
Transform a value between 2 linear intervals.
s | value related to the interval [s1, s2] | |
s1 | first border of scale interval | |
s2 | second border of scale interval | |
p1 | first border of target interval | |
p2 | second border of target interval |