A scale engine for logarithmic (base 10) scales. Más...

#include <qwt_scale_engine.h>

Diagrama de herencias de QwtLog10ScaleEngine

Métodos públicos
virtual void	autoScale (int maxSteps, double &x1, double &x2, double &stepSize) const
virtual QwtScaleDiv	divideScale (double x1, double x2, int numMajorSteps, int numMinorSteps, double stepSize=0.0) const
	Calculate a scale division.
virtual QwtScaleTransformation *	transformation () const
Métodos protegidos
QwtDoubleInterval	log10 (const QwtDoubleInterval &) const
QwtDoubleInterval	pow10 (const QwtDoubleInterval &) const

Descripción detallada

A scale engine for logarithmic (base 10) scales.

The step size is measured in *decades* and the major step size will be adjusted to fit the pattern $\left\{ 1,2,3,5\right\} \cdot 10^{n}$ , where n is a natural number including zero.

Atención:: the step size as well as the margins are measured in *decades*.

Documentación de las funciones miembro

void QwtLog10ScaleEngine::autoScale	(	int	maxNumSteps,
		double &	x1,
		double &	x2,
		double &	stepSize
	)		const `[virtual]`

Align and divide an interval

Parámetros:

maxNumSteps	Max. number of steps
x1	First limit of the interval (In/Out)
x2	Second limit of the interval (In/Out)
stepSize	Step size (Out)

Ver también:: QwtScaleEngine::setAttribute

Implementa QwtScaleEngine.

QwtScaleDiv QwtLog10ScaleEngine::divideScale	(	double	x1,
		double	x2,
		int	maxMajSteps,
		int	maxMinSteps,
		double	stepSize = `0.0`
	)		const `[virtual]`

Calculate a scale division.

Parámetros:

x1	First interval limit
x2	Second interval limit
maxMajSteps	Maximum for the number of major steps
maxMinSteps	Maximum number of minor steps
stepSize	Step size. If stepSize == 0, the scaleEngine calculates one.

Ver también:: QwtScaleEngine::stepSize, QwtLog10ScaleEngine::subDivide

Implementa QwtScaleEngine.

QwtDoubleInterval QwtLog10ScaleEngine::log10 ( const QwtDoubleInterval & interval ) const [protected]

Return the interval [log10(interval.minValue(), log10(interval.maxValue]

QwtDoubleInterval QwtLog10ScaleEngine::pow10 ( const QwtDoubleInterval & interval ) const [protected]

Return the interval [pow10(interval.minValue(), pow10(interval.maxValue]

QwtScaleTransformation * QwtLog10ScaleEngine::transformation ( ) const [virtual]

Return a transformation, for logarithmic (base 10) scales

Implementa QwtScaleEngine.

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qwt/src/qwt_scale_engine.h
src/qwt/src/qwt_scale_engine.cpp

Métodos públicos

Métodos protegidos

Descripción detallada

Documentación de las funciones miembro