Log2ScaleEngine Class Reference

#include <Log2ScaleEngine.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	log2 (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

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Member Function Documentation

QwtDoubleInterval Log2ScaleEngine::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:

	interval	Interval
	stepSize	Step size

Returns:

Aligned interval

References log2().

Referenced by autoScale(), and buildTicks().

void Log2ScaleEngine::autoScale	(	int	maxNumSteps,
		double &	x1,
		double &	x2,
		double &	stepSize
	)			const [virtual]

Align and divide an interval

Parameters:

	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)

References align(), and log2().

QwtValueList Log2ScaleEngine::buildMajorTicks	(	const QwtDoubleInterval &	interval,
		double	stepSize
	)			const [private]

References log2().

Referenced by buildTicks().

QwtValueList Log2ScaleEngine::buildMinorTicks	(	const QwtValueList &	majorTicks,
		int	maxMinMark,
		double	step
	)			const [private]

Referenced by buildTicks().

void Log2ScaleEngine::buildTicks	(	const QwtDoubleInterval &	interval,
		double	stepSize,
		int	maxMinSteps,
		QwtValueList	ticks[QwtScaleDiv::NTickTypes]
	)			const [private]

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

Referenced by divideScale().

QwtScaleDiv Log2ScaleEngine::divideScale	(	double	x1,
		double	x2,
		int	maxMajSteps,
		int	maxMinSteps,
		double	stepSize = 0.0
	)			const [virtual]

Calculate a scale division.

Parameters:

	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.

References buildTicks(), and log2().

QwtDoubleInterval Log2ScaleEngine::log2

(

const QwtDoubleInterval &

interval

)

const [protected]

Return the interval [log2(interval.minValue(), log2(interval.maxValue]

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

QwtScaleTransformation * Log2ScaleEngine::transformation

(

)

const [virtual]

Return a dummy transformation

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

• qtiplot/src/plot2D/Log2ScaleEngine.h
• qtiplot/src/plot2D/Log2ScaleEngine.cpp