QwtLog10ScaleEngine(3) Qwt User's Guide QwtLog10ScaleEngine(3)NAMEQwtLog10ScaleEngine-
SYNOPSIS
#include <qwt_scale_engine.h>
Inherits QwtScaleEngine.
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
virtual QwtScaleTransformation * transformation () const
Protected Member Functions
QwtDoubleInterval log10 (const QwtDoubleInterval &) const
QwtDoubleInterval pow10 (const QwtDoubleInterval &) const
Additional Inherited Members
Detailed Description
A scale engine for logarithmic (base 10) scales.
The step size is measured in decades aighthe major step size will be
adjusted to fit the pattern $t 1,2,3,5
Warning:
the step size as well as the margins are measured in decades.
Member Function Documentation
void QwtLog10ScaleEngine::autoScale (intmaxNumSteps, 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)
See also:
QwtScaleEngine::setAttribute()
Implements QwtScaleEngine.
QwtScaleDiv QwtLog10ScaleEngine::divideScale (doublex1, doublex2,
intmaxMajSteps, intmaxMinSteps, doublestepSize = 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.
See also:
QwtScaleEngine::stepSize(), QwtLog10ScaleEngine::subDivide()
Implements QwtScaleEngine.
QwtDoubleInterval QwtLog10ScaleEngine::log10 (const QwtDoubleInterval
&interval) const [protected]
Return the interval [log10(interval.minValue(),
log10(interval.maxValue]
QwtDoubleInterval QwtLog10ScaleEngine::pow10 (const QwtDoubleInterval
&interval) const [protected]
Return the interval [pow10(interval.minValue(),
pow10(interval.maxValue]
QwtScaleTransformation * QwtLog10ScaleEngine::transformation () const
[virtual]
Return a transformation, for logarithmic (base 10) scales
Implements QwtScaleEngine.
Author
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Version 5.2.3 Tue Nov 20 2012 QwtLog10ScaleEngine(3)
