NAME

       QwtLog10ScaleEngine -

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 mightred in decades and the 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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