QtiPlot  0.9.8.2
Public Member Functions | Protected Member Functions | Private Member Functions
ReciprocalScaleEngine Class Reference

A scale engine for reciprocal (1/t) scales. More...

#include <ReciprocalScaleEngine.h>

List of all members.

Public Member Functions

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

Protected Member Functions

QwtDoubleInterval align (const QwtDoubleInterval &, double stepSize) const
 Align an interval to a step size.

Private Member Functions

QwtValueList buildMajorTicks (const QwtDoubleInterval &interval, double stepSize) const
void buildMinorTicks (const QwtValueList &majorTicks, int maxMinMark, double step, QwtValueList &, QwtValueList &) const
void buildTicks (const QwtDoubleInterval &, double stepSize, int maxMinSteps, QwtValueList ticks[QwtScaleDiv::NTickTypes]) const

Detailed Description

A scale engine for reciprocal (1/t) scales.


Member Function Documentation

QwtDoubleInterval ReciprocalScaleEngine::align ( const QwtDoubleInterval &  interval,
double  stepSize 
) const [protected]

Align an interval to a step size.

The limits of an interval are aligned that both are integer multiples of the step size.

Parameters:
intervalInterval
stepSizeStep size
Returns:
Aligned interval

Referenced by autoScale(), and buildTicks().

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

Align and divide an interval

Parameters:
maxNumStepsMax. number of steps
x1First limit of the interval (In/Out)
x2Second limit of the interval (In/Out)
stepSizeStep size (Out)

References align().

QwtValueList ReciprocalScaleEngine::buildMajorTicks ( const QwtDoubleInterval &  interval,
double  stepSize 
) const [private]

Referenced by buildTicks().

void ReciprocalScaleEngine::buildMinorTicks ( const QwtValueList &  majorTicks,
int  maxMinMark,
double  step,
QwtValueList &  minorTicks,
QwtValueList &  mediumTicks 
) const [private]

Referenced by buildTicks().

void ReciprocalScaleEngine::buildTicks ( const QwtDoubleInterval &  interval,
double  stepSize,
int  maxMinSteps,
QwtValueList  ticks[QwtScaleDiv::NTickTypes] 
) const [private]

References align(), buildMajorTicks(), and buildMinorTicks().

Referenced by divideScale().

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

Calculate a scale division.

Parameters:
x1First interval limit
x2Second interval limit
maxMajStepsMaximum for the number of major steps
maxMinStepsMaximum number of minor steps
stepSizeStep size. If stepSize == 0, the scaleEngine calculates one.
See also:
QwtScaleEngine::stepSize(), QwtScaleEngine::subDivide()

References buildTicks().

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

Return a dummy transformation


The documentation for this class was generated from the following files: