QwtScaleArithmetic Class Reference

List of all members.

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Detailed Description

Arithmetic including a tolerance.

Definition at line 22 of file qwt_scale_engine.h.

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

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Member Function Documentation

double QwtScaleArithmetic::ceil125 (  double  x  )  [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 Definition at line 98 of file qwt_scale_engine.cpp. Referenced by QwtScaleEngine::divideInterval().

double QwtScaleArithmetic::ceilEps (  double  value, double  intervalSize )  [static]

Ceil a value, relative to an interval Parameters: value  Value to ceil intervalSize  Interval size See also: floorEps Definition at line 50 of file qwt_scale_engine.cpp. Referenced by QwtLinearScaleEngine::align().

int QwtScaleArithmetic::compareEps (  double  value1, double  value2, double  intervalSize )  [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 Definition at line 28 of file qwt_scale_engine.cpp. Referenced by QwtScaleEngine::contains().

double QwtScaleArithmetic::floor125 (  double  x  )  [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 Definition at line 126 of file qwt_scale_engine.cpp.

double QwtScaleArithmetic::floorEps (  double  value, double  intervalSize )  [static]

Floor a value, relative to an interval Parameters: value  Value to floor intervalSize  Interval size See also: floorEps Definition at line 67 of file qwt_scale_engine.cpp. Referenced by QwtLinearScaleEngine::align().

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