QwtLinearScaleEngine - A scale engine for linear scales.

NAME

       QwtLinearScaleEngine - A scale engine for linear scales.

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

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, 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

   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:
           setAttribute()

       Implements QwtScaleEngine.

   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.

   QwtScaleTransformation * QwtLinearScaleEngine::transformation () const
       [virtual]
       Return a transformation, for linear scales

       Implements QwtScaleEngine.

Author

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