QwtHueColorMap(3)

Qwt User's Guide

QwtHueColorMap(3)

NAME

QwtHueColorMap - QwtHueColorMap varies the hue value of the HSV color model.

SYNOPSIS

#include <qwt_color_map.h>

Inherits QwtColorMap.

Public Member Functions

QwtHueColorMap (QwtColorMap::Format=QwtColorMap::RGB)
Constructor. virtual ~QwtHueColorMap ()
Destructor. void setHueInterval (int hue1, int hue2)
void setSaturation (int saturation)
Set the the saturation coordinate. void setValue (int value)
Set the the value coordinate. void setAlpha (int alpha)
Set the the alpha coordinate. int hue1 () const
int hue2 () const
int saturation () const
int value () const
int alpha () const
virtual QRgb rgb (const QwtInterval &, double value) const override

Additional Inherited Members

Detailed Description

QwtHueColorMap varies the hue value of the HSV color model.

QwtHueColorMap can be used to set up a color map easily, that runs cyclic over all colors. Each cycle has 360 different steps.

The values for value and saturation are in the range of 0 to 255 and doesn't depend on the data value to be mapped.

See also

QwtSaturationValueColorMap

Definition at line 180 of file qwt_color_map.h.

Constructor & Destructor Documentation

QwtHueColorMap::QwtHueColorMap (QwtColorMap::Format format = QwtColorMap::RGB) [explicit]

Constructor. The hue interval is initialized by 0 to 359. All other coordinates are set to 255.

Parameters

format Format of the color map

See also

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

Definition at line 723 of file qwt_color_map.cpp.

Member Function Documentation

int QwtHueColorMap::alpha () const

Returns

Alpha coordinate

See also

setAlpha()

Definition at line 856 of file qwt_color_map.cpp.

int QwtHueColorMap::hue1 () const

Returns

First hue coordinate

See also

setHueInterval()

Definition at line 820 of file qwt_color_map.cpp.

int QwtHueColorMap::hue2 () const

Returns

Second hue coordinate

See also

setHueInterval()

Definition at line 829 of file qwt_color_map.cpp.

QRgb QwtHueColorMap::rgb (const QwtInterval & interval, double value) 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 869 of file qwt_color_map.cpp.

int QwtHueColorMap::saturation () const

Returns

Saturation coordinate

See also

setSaturation()

Definition at line 838 of file qwt_color_map.cpp.

void QwtHueColorMap::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 805 of file qwt_color_map.cpp.

void QwtHueColorMap::setHueInterval (int hue1, int hue2)

Set the interval for the hue coordinate

hue1/hue2 need to be positive number and can be > 360 to define cycles. F.e. 420 to 240 defines a map yellow/red/magenta/blue.

Parameters

hue1 First hue coordinate
hue2 Second hue coordinate

See also

hue1(), hue2()

Definition at line 746 of file qwt_color_map.cpp.

void QwtHueColorMap::setSaturation (int saturation)

Set the the saturation coordinate. saturation needs to be in the range 0 to 255,

Parameters

saturation Saturation coordinate

See also

saturation()

Definition at line 764 of file qwt_color_map.cpp.

void QwtHueColorMap::setValue (int value)

Set the the value coordinate. value needs to be in the range 0 to 255,

Parameters

value Value coordinate

See also

value()

Definition at line 784 of file qwt_color_map.cpp.

int QwtHueColorMap::value () const

Returns

Value coordinate

See also

setValue()

Definition at line 847 of file qwt_color_map.cpp.

Author

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Sun Jul 18 2021

Version 6.2.0