QwtLinearScaleEngine(3) Qwt User's Guide QwtLinearScaleEngine(3)NAMEQwtLinearScaleEngine-
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 align (const QwtDoubleInterval &, double stepSize)
const
Additional Inherited Members
Detailed Description
A scale engine for linear scales.
ight
The step size will fit into the pattern $t 1,2,5
Member Function Documentation
QwtDoubleInterval QwtLinearScaleEngine::align (const QwtDoubleInterval
&interval, doublestepSize) 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
void QwtLinearScaleEngine::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:
setAttribute()
Implements QwtScaleEngine.
QwtScaleDiv QwtLinearScaleEngine::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(), QwtScaleEngine::subDivide()
Implements QwtScaleEngine.
QwtScaleTransformation * QwtLinearScaleEngine::transformation () const
[virtual]
Return a transformation, for linear scales
Implements QwtScaleEngine.
Author
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Version 5.2.3 Tue Nov 20 2012 QwtLinearScaleEngine(3)
