qwtcolormap(3) [debian man page]
QwtColorMap(3) Qwt User's Guide QwtColorMap(3) NAME
QwtColorMap - QwtColorMap is used to map values into colors. SYNOPSIS
#include <qwt_color_map.h> Inherited by QwtAlphaColorMap, and QwtLinearColorMap. Public Types enum Format { RGB, Indexed } Public Member Functions QColor color (const QwtDoubleInterval &, double value) const virtual unsigned char colorIndex (const QwtDoubleInterval &interval, double value) const =0 virtual QVector< QRgb > colorTable (const QwtDoubleInterval &) const virtual QwtColorMap * copy () const =0 Format format () const QwtColorMap (Format=QwtColorMap::RGB) virtual QRgb rgb (const QwtDoubleInterval &interval, double value) const =0 virtual ~QwtColorMap () Detailed Description QwtColorMap is used to map values into colors. For displaying 3D data on a 2D plane the 3rd dimension is often displayed using colors, like f.e in a spectrogram. Each color map is optimized to return colors for only one of the following image formats: o QImage::Format_Indexed8 o QImage::Format_ARGB32 See also: QwtPlotSpectrogram, QwtScaleWidget Member Enumeration Documentation enum QwtColorMap::Format .IP o 2 RGB The map is intended to map into QRgb values. o Indexed The map is intended to map into 8 bit values, that are indices into the color table. See also: rgb(), colorIndex(), colorTable() Constructor &; Destructor Documentation QwtColorMap::QwtColorMap (Formatformat = QwtColorMap::RGB) Constructor. QwtColorMap::~QwtColorMap () [virtual] Destructor. Member Function Documentation QColor QwtColorMap::color (const QwtDoubleInterval &interval, doublevalue) const [inline] Map a value into a color Parameters: interval Valid interval for values value Value Returns: Color corresponding to value Warning: This method is slow for Indexed color maps. If it is necessary to map many values, its better to get the color table once and find the color using colorIndex(). virtual unsigned char QwtColorMap::colorIndex (const QwtDoubleInterval &interval, doublevalue) const [pure virtual] Map a value of a given interval into a color index Parameters: interval Range for the values value Value Returns: color index, corresponding to value Implemented in QwtLinearColorMap. QwtColorTable QwtColorMap::colorTable (const QwtDoubleInterval &interval) const [virtual] Build and return a color map of 256 colors The color table is needed for rendering indexed images in combination with using colorIndex(). Parameters: interval Range for the values Returns: A color table, that can be used for a QImage virtual QwtColorMap* QwtColorMap::copy () const [pure virtual] Clone the color map. Implemented in QwtLinearColorMap, and QwtAlphaColorMap. QwtColorMap::Format QwtColorMap::format () const [inline] Returns: Intended format of the color map See also: Format virtual QRgb QwtColorMap::rgb (const QwtDoubleInterval &interval, doublevalue) const [pure virtual] Map a value of a given interval into a rgb value. Parameters: interval Range for the values value Value Returns: rgb value, corresponding to value Implemented in QwtLinearColorMap, and QwtAlphaColorMap. Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtColorMap(3)
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QwtScaleDiv(3) Qwt User's Guide QwtScaleDiv(3) NAME
QwtScaleDiv - A class representing a scale division. SYNOPSIS
#include <qwt_scale_div.h> Public Types enum TickType { NoTick = -1, MinorTick, MediumTick, MajorTick, NTickTypes } Public Member Functions bool contains (double v) const QwtDoubleInterval interval () const void invalidate () void invert () bool isValid () const double lowerBound () const int operator!= (const QwtScaleDiv &s) const int operator== (const QwtScaleDiv &s) const QwtScaleDiv () QwtScaleDiv (double lowerBound, double upperBound, QwtValueList[NTickTypes]) QwtScaleDiv (const QwtDoubleInterval &, QwtValueList[NTickTypes]) double range () const void setInterval (const QwtDoubleInterval &) void setInterval (double lowerBound, double upperBound) void setTicks (int type, const QwtValueList &) const QwtValueList & ticks (int type) const double upperBound () const Detailed Description A class representing a scale division. A scale division consists of its limits and 3 list of tick values qualified as major, medium and minor ticks. In most cases scale divisions are calculated by a QwtScaleEngine. See also: subDivideInto(), subDivide() Member Enumeration Documentation enum QwtScaleDiv::TickType Scale tick types. Constructor &; Destructor Documentation QwtScaleDiv::QwtScaleDiv () [explicit] Construct an invalid QwtScaleDiv instance. QwtScaleDiv::QwtScaleDiv (const QwtDoubleInterval &interval, QwtValueListticks[NTickTypes]) [explicit] Construct QwtScaleDiv instance. Parameters: interval Interval ticks List of major, medium and minor ticks QwtScaleDiv::QwtScaleDiv (doublelowerBound, doubleupperBound, QwtValueListticks[NTickTypes]) [explicit] Construct QwtScaleDiv instance. Parameters: lowerBound First interval limit upperBound Second interval limit ticks List of major, medium and minor ticks Member Function Documentation bool QwtScaleDiv::contains (doublevalue) const Return if a value is between lowerBound() and upperBound() Parameters: value Value Returns: true/false QwtDoubleInterval QwtScaleDiv::interval () const [inline] Returns: lowerBound -> upperBound void QwtScaleDiv::invalidate () Invalidate the scale division. void QwtScaleDiv::invert () Invert the scale divison. bool QwtScaleDiv::isValid () const Check if the scale division is valid. double QwtScaleDiv::lowerBound () const [inline] Returns: lower bound See also: upperBound() int QwtScaleDiv::operator!= (const QwtScaleDiv &s) const Inequality. Returns: true if this instance is not equal to s int QwtScaleDiv::operator== (const QwtScaleDiv &other) const Equality operator. Returns: true if this instance is equal to other double QwtScaleDiv::range () const [inline] Returns: upperBound() - lowerBound() void QwtScaleDiv::setInterval (const QwtDoubleInterval &interval) Change the interval Parameters: interval Interval void QwtScaleDiv::setInterval (doublelowerBound, doubleupperBound) [inline] Change the interval Parameters: lowerBound lower bound upperBound upper bound void QwtScaleDiv::setTicks (inttype, const QwtValueList &ticks) Assign ticks Parameters: type MinorTick, MediumTick or MajorTick ticks Values of the tick positions const QwtValueList & QwtScaleDiv::ticks (inttype) const Return a list of ticks Parameters: type MinorTick, MediumTick or MajorTick double QwtScaleDiv::upperBound () const [inline] Returns: upper bound See also: lowerBound() Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 5.2.2 Mon Aug 1 2011 QwtScaleDiv(3)