

The step size is measured in *decades* and the major step size will be adjusted to fit the pattern
, where n is a natural number including zero.
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 |
| void QwtLog10ScaleEngine::autoScale | ( | int | maxNumSteps, | |
| double & | x1, | |||
| double & | x2, | |||
| double & | stepSize | |||
| ) | const [virtual] |
Align and divide an interval
| 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) |
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.
| 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. |
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().
1.5.5