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QwtLog10ScaleEngine(3) Qwt User's Guide QwtLog10ScaleEngine(3)

QwtLog10ScaleEngine -

#include <qwt_scale_engine.h>
Inherits QwtScaleEngine.


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
 
virtual QwtScaleTransformation * transformation () const
 


QwtDoubleInterval log10 (const QwtDoubleInterval &) const
 
QwtDoubleInterval pow10 (const QwtDoubleInterval &) const
 

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 $re n is a natural number including zero.
Warning:
the step size as well as the margins are measured in decades.

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)
See also:
QwtScaleEngine::setAttribute()
Implements QwtScaleEngine.

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.
See also:
QwtScaleEngine::stepSize(), QwtLog10ScaleEngine::subDivide()
Implements QwtScaleEngine.

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

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

Return a transformation, for logarithmic (base 10) scales
Implements QwtScaleEngine.

Generated automatically by Doxygen for Qwt User's Guide from the source code.
Tue Nov 20 2012 Version 5.2.3

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