qwtscalearithmetic(3) [debian man page]
QwtScaleArithmetic(3) Qwt User's Guide QwtScaleArithmetic(3) NAME
QwtScaleArithmetic - Arithmetic including a tolerance. 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 Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtScaleArithmetic(3)
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QwtScaleMap(3) Qwt User's Guide QwtScaleMap(3) NAME
QwtScaleMap - A scale map. SYNOPSIS
#include <qwt_scale_map.h> Public Member Functions double invTransform (double i) const QwtScaleMap & operator= (const QwtScaleMap &) double p1 () const double p2 () const double pDist () const QwtScaleMap (const QwtScaleMap &) QwtScaleMap () double s1 () const double s2 () const double sDist () const void setPaintInterval (int p1, int p2) void setPaintXInterval (double p1, double p2) void setScaleInterval (double s1, double s2) void setTransformation (QwtScaleTransformation *) int transform (double x) const const QwtScaleTransformation * transformation () const double xTransform (double x) const ~QwtScaleMap () Public Attributes QT_STATIC_CONST double LogMax = 1.0e150 QT_STATIC_CONST double LogMin = 1.0e-150 Detailed Description A scale map. QwtScaleMap offers transformations from a scale into a paint interval and vice versa. Constructor &; Destructor Documentation QwtScaleMap::QwtScaleMap () Constructor. The scale and paint device intervals are both set to [0,1]. QwtScaleMap::QwtScaleMap (const QwtScaleMap &other) Copy constructor. QwtScaleMap::~QwtScaleMap () Destructor Member Function Documentation double QwtScaleMap::invTransform (doublep) const [inline] Transform an paint device value into a value in the interval of the scale. Parameters: p Value relative to the coordinates of the paint device See also: transform() QwtScaleMap & QwtScaleMap::operator= (const QwtScaleMap &other) Assignment operator. double QwtScaleMap::p1 () const [inline] Returns: First border of the paint interval double QwtScaleMap::p2 () const [inline] Returns: Second border of the paint interval double QwtScaleMap::pDist () const [inline] Returns: qwtAbs(p2() - p1()) double QwtScaleMap::s1 () const [inline] Returns: First border of the scale interval double QwtScaleMap::s2 () const [inline] Returns: Second border of the scale interval double QwtScaleMap::sDist () const [inline] Returns: qwtAbs(s2() - s1()) void QwtScaleMap::setPaintInterval (intp1, intp2) Specify the borders of the paint device interval. Parameters: p1 first border p2 second border void QwtScaleMap::setPaintXInterval (doublep1, doublep2) Specify the borders of the paint device interval. Parameters: p1 first border p2 second border void QwtScaleMap::setScaleInterval (doubles1, doubles2) Specify the borders of the scale interval. Parameters: s1 first border s2 second border Warning: logarithmic scales might be aligned to [LogMin, LogMax] void QwtScaleMap::setTransformation (QwtScaleTransformation *transformation) Initialize the map with a transformation int QwtScaleMap::transform (doubles) const [inline] Transform a point related to the scale interval into an point related to the interval of the paint device and round it to an integer. (In Qt <= 3.x paint devices are integer based. ) Parameters: s Value relative to the coordinates of the scale See also: xTransform() const QwtScaleTransformation * QwtScaleMap::transformation () const Get the transformation. double QwtScaleMap::xTransform (doubles) const [inline] Transform a point related to the scale interval into an point related to the interval of the paint device Parameters: s Value relative to the coordinates of the scale Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtScaleMap(3)