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Man Pages
QwtLinearScaleEngine(3) Qwt User's Guide QwtLinearScaleEngine(3)

QwtLinearScaleEngine -

#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 align (const QwtDoubleInterval &, double stepSize) const
 

A scale engine for linear scales.
The step size will fit into the pattern $re n is an integer.

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

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:
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(), QwtScaleEngine::subDivide()
Implements QwtScaleEngine.

Return a transformation, for linear 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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