QwtSaturationValueColorMap - QwtSaturationValueColorMap varies the saturation and/or value for a given hue in the HSV color model.

NAME

QwtSaturationValueColorMap − QwtSaturationValueColorMap varies the saturation and/or value for a given hue in the HSV color model.

SYNOPSIS

#include <qwt_color_map.h>

Inherits QwtColorMap.

Public Member Functions

QwtSaturationValueColorMap ()
Constructor.
virtual ˜QwtSaturationValueColorMap ()
Destructor.
void setHue (int hue)
Set the the hue coordinate.
void setSaturationInterval (int sat1, int sat2)
Set the interval for the saturation coordinate.
void setValueInterval (int value1, int value2)
Set the interval for the value coordinate.
void setAlpha (int alpha)
Set the the alpha coordinate.
int hue () const
int saturation1 () const
int saturation2 () const
int value1 () const
int value2 () const
int alpha () const
virtual QRgb rgb (const QwtInterval &, double value) const override

Public Member Functions inherited from QwtColorMap

QwtColorMap (Format=QwtColorMap::RGB)
virtual ˜QwtColorMap ()
Destructor.
void setFormat (Format)
virtual uint colorIndex (int numColors, const QwtInterval &interval, double value) const
Map a value of a given interval into a color index.
QColor color (const QwtInterval &, double value) const
virtual QVector< QRgb > colorTable (int numColors) const
virtual QVector< QRgb > colorTable256 () const

Additional Inherited Members

Public Types inherited from QwtColorMap

enum Format { RGB, Indexed }

Public Attributes inherited from QwtColorMap

Format const

Detailed Description

QwtSaturationValueColorMap varies the saturation and/or value for a given hue in the HSV color model.

Value and saturation are in the range of 0 to 255 while hue is in the range of 0 to 259.

See also

QwtHueColorMap

Definition at line 214 of file qwt_color_map.h.

Constructor & Destructor Documentation

QwtSaturationValueColorMap::QwtSaturationValueColorMap ()

Constructor. The value interval is initialized by 0 to 255, saturation by 255 to 255. Hue to 0 and alpha to 255.

So the default setting interpolates the value coordinate only.

See also

setHueInterval(), setSaturation(), setValue(), setValue()

Definition at line 972 of file qwt_color_map.cpp.

QwtSaturationValueColorMap::˜QwtSaturationValueColorMap () [virtual]

Destructor.

Definition at line 978 of file qwt_color_map.cpp.

Member Function Documentation

int QwtSaturationValueColorMap::alpha () const

Returns

Alpha coordinate

See also

setAlpha()

Definition at line 1127 of file qwt_color_map.cpp.

int QwtSaturationValueColorMap::hue () const

Returns

Hue coordinate

See also

setHue()

Definition at line 1082 of file qwt_color_map.cpp.

QRgb QwtSaturationValueColorMap::rgb (const QwtInterval & interval, doublevalue) const [override], [virtual]

Map a value of a given interval into a RGB value

Parameters

interval Range for all values
value Value to map into a RGB value

Returns

RGB value for value

Implements QwtColorMap.

Definition at line 1140 of file qwt_color_map.cpp.

int QwtSaturationValueColorMap::saturation1 () const

Returns

First saturation coordinate

See also

setSaturationInterval()

Definition at line 1091 of file qwt_color_map.cpp.

int QwtSaturationValueColorMap::saturation2 () const

Returns

Second saturation coordinate

See also

setSaturationInterval()

Definition at line 1100 of file qwt_color_map.cpp.

void QwtSaturationValueColorMap::setAlpha (int alpha)

Set the the alpha coordinate. alpha needs to be in the range 0 to 255, where 255 means opaque and 0 means transparent.

Parameters

alpha Alpha coordinate

See also

alpha()

Definition at line 1067 of file qwt_color_map.cpp.

void QwtSaturationValueColorMap::setHue (int hue)

Set the the hue coordinate. Hue coordinates outside 0 to 359 will be interpreted as hue % 360..

Parameters

hue Hue coordinate

See also

hue()

Definition at line 992 of file qwt_color_map.cpp.

void QwtSaturationValueColorMap::setSaturationInterval (int saturation1,int saturation2)

Set the interval for the saturation coordinate. When saturation1 == saturation2 the map interpolates between the value coordinates only

saturation1/saturation2 need to be in the range 0 to 255.

Parameters

saturation1 First saturation
saturation2 Second saturation

See also

saturation1(), saturation2(), setValueInterval()

Definition at line 1016 of file qwt_color_map.cpp.

void QwtSaturationValueColorMap::setValueInterval (int value1, int value2)

Set the interval for the value coordinate. When value1 == value2 the map interpolates between the saturation coordinates only.

value1/value2 need to be in the range 0 to 255.

Parameters

value1 First value
value2 Second value

See also

value1(), value2(), setSaturationInterval()

Definition at line 1043 of file qwt_color_map.cpp.

int QwtSaturationValueColorMap::value1 () const

Returns

First value coordinate

See also

setValueInterval()

Definition at line 1109 of file qwt_color_map.cpp.

int QwtSaturationValueColorMap::value2 () const

Returns

Second value coordinate

See also

setValueInterval()

Definition at line 1118 of file qwt_color_map.cpp.

Author

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Updated 2026-06-01 - jenkler.se | uex.se