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

#include <LnScaleEngine.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 ln (const QwtDoubleInterval &) const

Private Member Functions

QwtDoubleInterval align (const QwtDoubleInterval &, double stepSize) const
 Align an interval to a step size.
QwtValueList buildMajorTicks (const QwtDoubleInterval &interval, double stepSize) const
QwtValueList buildMinorTicks (const QwtValueList &majorTicks, int maxMinMark, double step) const
void buildTicks (const QwtDoubleInterval &, double stepSize, int maxMinSteps, QwtValueList ticks[QwtScaleDiv::NTickTypes]) const

Member Function Documentation

QwtDoubleInterval LnScaleEngine::align ( const QwtDoubleInterval &  interval,
double  stepSize 
) const [private]

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

References ln().

Referenced by autoScale(), and buildTicks().

void LnScaleEngine::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(), and ln().

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

References ln().

Referenced by buildTicks().

QwtValueList LnScaleEngine::buildMinorTicks ( const QwtValueList &  majorTicks,
int  maxMinMark,
double  step 
) const [private]

Referenced by buildTicks().

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

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

Referenced by divideScale().

QwtScaleDiv LnScaleEngine::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.

References buildTicks(), and ln().

QwtDoubleInterval LnScaleEngine::ln ( const QwtDoubleInterval &  interval) const [protected]

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

Referenced by align(), autoScale(), buildMajorTicks(), and divideScale().

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

Return a dummy transformation


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