qwtlinearscaleengine(3)
NAME
QwtLinearScaleEngine
SYNOPSIS
Inherits QwtScaleEngine.
Detailed Description
- A scale engine for linear scales.
- ight
- The step size will fit into the pattern $t 1,2,5
- Definition at line 126 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 align (const QwtDoubleInterval &, double stepSize)
const
Member Function Documentation
- void QwtLinearScaleEngine::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:
QwtLinearScaleEngine::setAttribute
- Implements QwtScaleEngine.
- Definition at line 416 of file qwt_scale_engine.cpp.
- References align(), QwtScaleEngine::buildInterval(),
QwtScaleEngine::divideInterval(), QwtDoubleInterval::extend(),
QwtScaleEngine::hiMargin(), QwtScaleEngine::loMargin(),
QwtDoubleInterval::maxValue(), QwtDoubleInterval::minValue(),
QwtDoubleInterval::normalized(), QwtScaleEngine::reference(),
QwtDoubleInterval::setMaxValue(), QwtDoubleInterval::setMinValue(),
QwtDoubleInterval::symmetrize(), QwtScaleEngine::testAttribute(), and
QwtDoubleInterval::width(). - QwtScaleDiv QwtLinearScaleEngine::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, QwtScaleEngine::subDivide
- Implements QwtScaleEngine.
- Definition at line 461 of file qwt_scale_engine.cpp.
- References QwtScaleEngine::divideInterval(), and
QwtDoubleInterval::width(). - Referenced by QwtLog10ScaleEngine::divideScale(), and
QwtDial::updateScale(). - QwtScaleTransformation * QwtLinearScaleEngine::transformation () const
- [virtual]
Return a transformation, for linear scales - Implements QwtScaleEngine.
- Definition at line 401 of file qwt_scale_engine.cpp.
- Referenced by QwtDial::updateScale().
- QwtDoubleInterval QwtLinearScaleEngine::align (const QwtDoubleInterval &
- interval, double stepSize) const [protected] 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
- Definition at line 600 of file qwt_scale_engine.cpp.
- References QwtScaleArithmetic::ceilEps(),
QwtScaleArithmetic::floorEps(), QwtDoubleInterval::maxValue(), and
QwtDoubleInterval::minValue(). - Referenced by autoScale().
Author
- Generated automatically by Doxygen for Qwt User's Guide from the source
code.