NAME

       QwtScaleArithmetic -

SYNOPSIS

       #include <qwt_scale_engine.h>

   Static Public Member Functions
       static double ceil125 (double x)
       static double ceilEps (double value, double intervalSize)
       static int compareEps (double value1, double value2, double intervalSize)
       static double divideEps (double interval, double steps)
       static double floor125 (double x)
       static double floorEps (double value, double intervalSize)

Detailed Description

       Arithmetic including a tolerance.

Member Function Documentation

   double QwtScaleArithmetic::ceil125 (doublex) [static]
       Find the smallest value out of {1,2,5}*10^n with an integer number n which is greater than
       or equal to x

       Parameters:
           x Input value

   double QwtScaleArithmetic::ceilEps (doublevalue, doubleintervalSize) [static]
       Ceil a value, relative to an interval

       Parameters:
           value Value to ceil
           intervalSize Interval size

       See also:
           floorEps()

   int QwtScaleArithmetic::compareEps (doublevalue1, doublevalue2, doubleintervalSize) [static]
       Compare 2 values, relative to an interval. Values are 'equal', when : $

       Parameters:
           value1 First value to compare
           value2 Second value to compare
           intervalSize interval size

       Returns:
           0: if equal, -1: if value2 > value1, 1: if value1 > value2

   double QwtScaleArithmetic::divideEps (doubleintervalSize, doublenumSteps) [static]
       Divide an interval into steps. $stepSize = (intervalSize - intervalSize * 10e^{-6}) /
       numSteps$.PP Parameters:
           intervalSize Interval size
           numSteps Number of steps

       Returns:
           Step size

   double QwtScaleArithmetic::floor125 (doublex) [static]
       Find the largest value out of {1,2,5}*10^n with an integer number n which is smaller than
       or equal to x. Parameters:
           x Input value

   double QwtScaleArithmetic::floorEps (doublevalue, doubleintervalSize) [static]
       Floor a value, relative to an interval

       Parameters:
           value Value to floor
           intervalSize Interval size

       See also:
           floorEps()

Author

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