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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QwtDoubleInterval(3) Qwt User's Guide QwtDoubleInterval(3) NAME
QwtDoubleInterval - A class representing an interval. SYNOPSIS
#include <qwt_double_interval.h> Public Types enum BorderMode { IncludeBorders = 0, ExcludeMinimum = 1, ExcludeMaximum = 2, ExcludeBorders = ExcludeMinimum | ExcludeMaximum } Public Member Functions int borderFlags () const bool contains (double value) const QwtDoubleInterval extend (double value) const QwtDoubleInterval intersect (const QwtDoubleInterval &) const bool intersects (const QwtDoubleInterval &) const void invalidate () QwtDoubleInterval inverted () const bool isNull () const bool isValid () const QwtDoubleInterval limited (double minValue, double maxValue) const double maxValue () const double minValue () const QwtDoubleInterval normalized () const int operator!= (const QwtDoubleInterval &) const QwtDoubleInterval operator& (const QwtDoubleInterval &) const QwtDoubleInterval & operator&= (const QwtDoubleInterval &) int operator== (const QwtDoubleInterval &) const QwtDoubleInterval operator| (double) const QwtDoubleInterval operator| (const QwtDoubleInterval &) const QwtDoubleInterval & operator|= (double) QwtDoubleInterval & operator|= (const QwtDoubleInterval &) QwtDoubleInterval (double minValue, double maxValue, int borderFlags=IncludeBorders) QwtDoubleInterval () void setBorderFlags (int) void setInterval (double minValue, double maxValue, int borderFlags=IncludeBorders) void setMaxValue (double) void setMinValue (double) QwtDoubleInterval symmetrize (double value) const QwtDoubleInterval unite (const QwtDoubleInterval &) const double width () const Detailed Description A class representing an interval. The interval is represented by 2 doubles, the lower and the upper limit. Member Enumeration Documentation enum QwtDoubleInterval::BorderMode Flag indicating if a border is included/excluded from an interval o IncludeBorders min/max values are inside the interval o ExcludeMinimum min value is not included in the interval o ExcludeMaximum max value is not included in the interval o ExcludeBorders min/max values are not included in the interval See also: setBorderMode(), testBorderMode() Constructor &; Destructor Documentation QwtDoubleInterval::QwtDoubleInterval () [inline] Default Constructor. Creates an invalid interval [0.0, -1.0] See also: setInterval(), isValid() QwtDoubleInterval::QwtDoubleInterval (doubleminValue, doublemaxValue, intborderFlags = IncludeBorders) [inline] Constructor Build an interval with from min/max values Parameters: minValue Minimum value maxValue Maximum value borderFlags Include/Exclude borders Member Function Documentation int QwtDoubleInterval::borderFlags () const [inline] Returns: Border flags See also: setBorderFlags() bool QwtDoubleInterval::contains (doublevalue) const Test if a value is inside an interval Parameters: value Value Returns: true, if value >= minValue() && value <= maxValue() QwtDoubleInterval QwtDoubleInterval::extend (doublevalue) const Extend the interval If value is below minValue, value becomes the lower limit. If value is above maxValue, value becomes the upper limit. extend has no effect for invalid intervals Parameters: value Value See also: isValid() QwtDoubleInterval QwtDoubleInterval::intersect (const QwtDoubleInterval &other) const Intersect 2 intervals. bool QwtDoubleInterval::intersects (const QwtDoubleInterval &other) const Test if two intervals overlap void QwtDoubleInterval::invalidate () [inline] Invalidate the interval The limits are set to interval [0.0, -1.0] See also: isValid() QwtDoubleInterval QwtDoubleInterval::inverted () const Invert the limits of the interval Returns: Inverted interval See also: normalized() bool QwtDoubleInterval::isNull () const [inline] Returns: true, if isValid() && (minValue() >= maxValue()) bool QwtDoubleInterval::isValid () const [inline] A interval is valid when minValue() <= maxValue(). In case of QwtDoubleInterval::ExcludeBorders it is true when minValue() < maxValue() QwtDoubleInterval QwtDoubleInterval::limited (doublelowerBound, doubleupperBound) const Limit the interval, keeping the border modes Parameters: lowerBound Lower limit upperBound Upper limit Returns: Limited interval double QwtDoubleInterval::maxValue () const [inline] Returns: Upper limit of the interval double QwtDoubleInterval::minValue () const [inline] Returns: Lower limit of the interval QwtDoubleInterval QwtDoubleInterval::normalized () const Normalize the limits of the interval. If maxValue() < minValue() the limits will be inverted. Returns: Normalized interval See also: isValid(), inverted() int QwtDoubleInterval::operator!= (const QwtDoubleInterval &other) const [inline] Compare two intervals. QwtDoubleInterval QwtDoubleInterval::operator& (const QwtDoubleInterval &interval) const [inline] Intersection of two intervals See also: intersect() QwtDoubleInterval & QwtDoubleInterval::operator&= (const QwtDoubleInterval &interval) Intersects this interval with the given interval. int QwtDoubleInterval::operator== (const QwtDoubleInterval &other) const [inline] Compare two intervals. QwtDoubleInterval QwtDoubleInterval::operator| (const QwtDoubleInterval &interval) const [inline] Union of two intervals See also: unite() QwtDoubleInterval QwtDoubleInterval::operator| (doublevalue) const [inline] Extend an interval See also: extend() QwtDoubleInterval & QwtDoubleInterval::operator|= (const QwtDoubleInterval &interval) Unites this interval with the given interval. void QwtDoubleInterval::setBorderFlags (intborderFlags) [inline] Change the border flags Parameters: borderFlags Or'd BorderMode flags See also: borderFlags() void QwtDoubleInterval::setInterval (doubleminValue, doublemaxValue, intborderFlags = IncludeBorders) [inline] Assign the limits of the interval Parameters: minValue Minimum value maxValue Maximum value borderFlags Include/Exclude borders void QwtDoubleInterval::setMaxValue (doublemaxValue) [inline] Assign the upper limit of the interval Parameters: maxValue Maximum value void QwtDoubleInterval::setMinValue (doubleminValue) [inline] Assign the lower limit of the interval Parameters: minValue Minimum value QwtDoubleInterval QwtDoubleInterval::symmetrize (doublevalue) const Adjust the limit that is closer to value, so that value becomes the center of the interval. Parameters: value Center Returns: Interval with value as center QwtDoubleInterval QwtDoubleInterval::unite (const QwtDoubleInterval &other) const Unite 2 intervals. double QwtDoubleInterval::width () const [inline] Return the width of an interval The width of invalid intervals is 0.0, otherwise the result is maxValue() - minValue(). See also: isValid() Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtDoubleInterval(3)