QwtHueColorMap Class Reference

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

#include <qwt_color_map.h>

Inheritance diagram for QwtHueColorMap:

Classes
class	PrivateData

Public Member Functions
	QwtHueColorMap (QwtColorMap::Format=QwtColorMap::RGB)
	Constructor.
virtual	~QwtHueColorMap ()
	Destructor.
void	setHueInterval (int hue1, int hue2)
	Set the interval for the hue coordinate.
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 QWT_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, const QwtInterval &interval, double value) const
	Map a value of a given interval into a color index.
QColor	color (const QwtInterval &, double value) const
	Map a value into a color.
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

format

Format of the color map

See also

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

Member Function Documentation

alpha()

int QwtHueColorMap::alpha

(

)

const

Returns

Alpha coordinate

See also

setAlpha()

hue1()

int QwtHueColorMap::hue1

(

)

const

Returns

First hue coordinate

See also

setHueInterval()

hue2()

int QwtHueColorMap::hue2

(

)

const

Returns

Second hue coordinate

See also

setHueInterval()

rgb()

QRgb QwtHueColorMap::rgb ( const QwtInterval &  interval, double  value  ) const

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.

saturation()

int QwtHueColorMap::saturation

(

)

const

Returns

Saturation coordinate

See also

setSaturation()

setAlpha()

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()

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

hue1	First hue coordinate
hue2	Second hue coordinate

See also

hue1(), hue2()

setSaturation()

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()

setValue()

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()

value()

int QwtHueColorMap::value

(

)

const

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/qwt_color_map.h
• /home/runner/work/QWT/QWT/src/qwt_color_map.cpp