QwtHueColorMap Class Reference

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

#include <qwt_colormap.h>

Inheritance diagram for QwtHueColorMap:

Classes
class	PrivateData

Public Member Functions
	QwtHueColorMap (QwtColorMap::Format=QwtColorMap::RGB)
	Constructor.
void	setHueInterval (int hue1, int hue2)
	Set the interval for the hue coordinate.
void	setSaturation (int saturation)
	Set the saturation coordinate.
void	setValue (int value)
	Set the value coordinate.
void	setAlpha (int alpha)
	Set the alpha coordinate.
int	hue1 () const
	Return first hue coordinate.
int	hue2 () const
	Return second hue coordinate.
int	saturation () const
	Return saturation coordinate.
int	value () const
	Return value coordinate.
int	alpha () const
	Return alpha coordinate.
virtual QRgb	rgb (double vMin, double vMax, double value) const override
	Map a value of a given interval into a RGB value.
Public Member Functions inherited from QwtColorMap
	QwtColorMap (Format=QwtColorMap::RGB)
	Constructor.
virtual	~QwtColorMap ()
	Destructor.
void	setFormat (Format)
	Set the format of the color map.
Format	format () const
virtual uint	colorIndex (int numColors, double vMin, double vMax, double value) const
	Map a value of a given interval into a color index.
QColor	color (double vMin, double vMax, double value) const
virtual QVector< QRgb >	colorTable (int numColors) const
	Build and return a color map of arbitrary number of colors.
virtual QVector< QRgb >	colorTable256 () const
	Build and return a color map of 256 colors.

Additional Inherited Members
Public Types inherited from QwtColorMap
enum	Format { RGB , Indexed }
	Format for color mapping. More...

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

Constructor & Destructor Documentation

QwtHueColorMap()

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

[in]

format

Format of the color map.

See also

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

Member Function Documentation

alpha()

int QwtHueColorMap::alpha

(

)

const

Return alpha coordinate.

Returns

Alpha coordinate.

See also

setAlpha()

hue1()

int QwtHueColorMap::hue1

(

)

const

Return first hue coordinate.

Returns

First hue coordinate.

See also

setHueInterval()

hue2()

int QwtHueColorMap::hue2

(

)

const

Return second hue coordinate.

Returns

Second hue coordinate.

See also

setHueInterval()

rgb()

QRgb QwtHueColorMap::rgb ( double  vMin, double  vMax, double  value  ) const

overridevirtual

Map a value of a given interval into a RGB value.

Parameters

[in]	vMin	Minimum of the value interval.
[in]	vMax	Maximum of the value interval.
[in]	value	Value to map into a RGB value.

Returns

RGB value for value.

Implements QwtColorMap.

saturation()

int QwtHueColorMap::saturation

(

)

const

Return saturation coordinate.

Returns

Saturation coordinate.

See also

setSaturation()

setAlpha()

void QwtHueColorMap::setAlpha

(

int

alpha

)

Set the alpha coordinate.

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

Parameters

[in]

alpha

Alpha coordinate.

See also

alpha()

setHueInterval()

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

[in]	hue1	First hue coordinate.
[in]	hue2	Second hue coordinate.

See also

hue1(), hue2()

setSaturation()

void QwtHueColorMap::setSaturation

(

int

saturation

)

Set the saturation coordinate.

saturation needs to be in the range 0 to 255.

Parameters

[in]

saturation

Saturation coordinate.

See also

saturation()

setValue()

void QwtHueColorMap::setValue

(

int

value

)

Set the value coordinate.

value needs to be in the range 0 to 255.

Parameters

[in]

value

Value coordinate.

See also

value()

value()

int QwtHueColorMap::value

(

)

const

Return value coordinate.

Returns

Value coordinate.

See also

setValue()

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The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/core/qwt_colormap.h
• /home/runner/work/QWT/QWT/src/core/qwt_colormap.cpp