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QwtLog10ScaleEngine
Langue: en
Version: 171129 (fedora - 06/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
- NAME
- SYNOPSIS
- Detailed Description
- Member Function Documentation
- void QwtLog10ScaleEngine::autoScale (int maxNumSteps, double & x1, double & x2, double & stepSize) const [virtual]
- QwtScaleDiv QwtLog10ScaleEngine::divideScale (double x1, double x2, int maxMajSteps, int maxMinSteps, double stepSize = 0.0) const [virtual]
- QwtScaleTransformation * QwtLog10ScaleEngine::transformation () const [virtual]
- QwtDoubleInterval QwtLog10ScaleEngine::log10 (const QwtDoubleInterval & interval) const [protected]
- QwtDoubleInterval QwtLog10ScaleEngine::pow10 (const QwtDoubleInterval & interval) const [protected]
- Author
NAME
QwtLog10ScaleEngine -SYNOPSIS
Inherits QwtScaleEngine.
Detailed Description
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*.
Definition at line 167 of file qwt_scale_engine.h.
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
Member Function Documentation
void QwtLog10ScaleEngine::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)
See also:
- QwtScaleEngine::setAttribute
Implements QwtScaleEngine.
Definition at line 629 of file qwt_scale_engine.cpp.
References QwtScaleEngine::buildInterval(), QwtScaleEngine::divideInterval(), QwtDoubleInterval::extend(), QwtScaleEngine::hiMargin(), QwtDoubleInterval::limited(), log10(), QwtScaleEngine::loMargin(), QwtDoubleInterval::maxValue(), QwtDoubleInterval::minValue(), QwtScaleEngine::reference(), QwtDoubleInterval::setInterval(), QwtScaleEngine::testAttribute(), and QwtDoubleInterval::width().
QwtScaleDiv QwtLog10ScaleEngine::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.
See also:
- QwtScaleEngine::stepSize, QwtLog10ScaleEngine::subDivide
Implements QwtScaleEngine.
Definition at line 686 of file qwt_scale_engine.cpp.
References QwtScaleEngine::attributes(), QwtScaleEngine::divideInterval(), QwtLinearScaleEngine::divideScale(), QwtScaleEngine::hiMargin(), QwtScaleDiv::invert(), QwtDoubleInterval::limited(), log10(), QwtScaleEngine::loMargin(), QwtDoubleInterval::maxValue(), QwtDoubleInterval::minValue(), QwtDoubleInterval::normalized(), QwtScaleEngine::reference(), QwtScaleEngine::setAttributes(), QwtScaleEngine::setMargins(), QwtScaleEngine::setReference(), and QwtDoubleInterval::width().
QwtScaleTransformation * QwtLog10ScaleEngine::transformation () const [virtual]
Return a transformation, for logarithmic (base 10) scales
Implements QwtScaleEngine.
Definition at line 614 of file qwt_scale_engine.cpp.
QwtDoubleInterval QwtLog10ScaleEngine::log10 (const QwtDoubleInterval & interval) const [protected]
Return the interval [log10(interval.minValue(), log10(interval.maxValue]
Definition at line 892 of file qwt_scale_engine.cpp.
References QwtDoubleInterval::maxValue(), and QwtDoubleInterval::minValue().
Referenced by autoScale(), and divideScale().
QwtDoubleInterval QwtLog10ScaleEngine::pow10 (const QwtDoubleInterval & interval) const [protected]
Return the interval [pow10(interval.minValue(), pow10(interval.maxValue]
Definition at line 902 of file qwt_scale_engine.cpp.
References QwtDoubleInterval::maxValue(), and QwtDoubleInterval::minValue().
Author
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