QwtLinearColorMap builds a color map from color stops. More...

#include <qwt_color_map.h>

Inheritance diagram for QwtLinearColorMap:

Classes
class	ColorStops

class	PrivateData

Public Types
enum	Mode { FixedColors, ScaledColors }

Public Types inherited from QwtColorMap
enum	Format { RGB, Indexed }

Public Member Functions
void	addColorStop (double value, const QColor &)

QColor	color1 () const

QColor	color2 () const

virtual uint	colorIndex (int numColors, const QwtInterval &, double value) const QWT_OVERRIDE
	Map a value of a given interval into a color index. More...

QVector< double >	colorStops () const

Mode	mode () const

	QwtLinearColorMap (QwtColorMap::Format=QwtColorMap::RGB)

	QwtLinearColorMap (const QColor &from, const QColor &to, QwtColorMap::Format=QwtColorMap::RGB)

virtual QRgb	rgb (const QwtInterval &, double value) const QWT_OVERRIDE

void	setColorInterval (const QColor &color1, const QColor &color2)

void	setMode (Mode)
	Set the mode of the color map. More...

virtual	~QwtLinearColorMap ()
	Destructor. More...

Public Member Functions inherited from QwtColorMap
QColor	color (const QwtInterval &, double value) const

virtual QVector< QRgb >	colorTable (int numColors) const

virtual QVector< QRgb >	colorTable256 () const

Format	format () const

	QwtColorMap (Format=QwtColorMap::RGB)

void	setFormat (Format)

virtual	~QwtColorMap ()
	Destructor. More...

Private Attributes
PrivateData *	d_data

Detailed Description

QwtLinearColorMap builds a color map from color stops.

A color stop is a color at a specific position. The valid range for the positions is [0.0, 1.0]. When mapping a value into a color it is translated into this interval according to mode().

Definition at line 96 of file qwt_color_map.h.

Member Enumeration Documentation

enum QwtLinearColorMap::Mode

Mode of color map

See also: setMode(), mode()

Enumerator
FixedColors	Return the color from the next lower color stop.
ScaledColors	Interpolating the colors of the adjacent stops.

Definition at line 103 of file qwt_color_map.h.

Constructor & Destructor Documentation

QwtLinearColorMap::QwtLinearColorMap ( QwtColorMap::Format format = QwtColorMap::RGB )

explicit

Build a color map with two stops at 0.0 and 1.0. The color at 0.0 is Qt::blue, at 1.0 it is Qt::yellow.

Parameters

format Preferred format of the color map

Definition at line 351 of file qwt_color_map.cpp.

QwtLinearColorMap::QwtLinearColorMap	(	const QColor &	color1,
		const QColor &	color2,
		QwtColorMap::Format	format = `QwtColorMap::RGB`
	)

Build a color map with two stops at 0.0 and 1.0.

Parameters

color1	Color used for the minimum value of the value interval
color2	Color used for the maximum value of the value interval
format	Preferred format for the color map

Definition at line 367 of file qwt_color_map.cpp.

QwtLinearColorMap::~QwtLinearColorMap ( )

virtual

Destructor.

Definition at line 377 of file qwt_color_map.cpp.

Member Function Documentation

void QwtLinearColorMap::addColorStop	(	double	value,
		const QColor &	color
	)

Add a color stop

The value has to be in the range [0.0, 1.0]. F.e. a stop at position 17.0 for a range [10.0,20.0] must be passed as: (17.0 - 10.0) / (20.0 - 10.0)

Parameters

value	Value between [0.0, 1.0]
color	Color stop

Definition at line 433 of file qwt_color_map.cpp.

QColor QwtLinearColorMap::color1 ( ) const

Returns: the first color of the color range

See also: setColorInterval()

Definition at line 451 of file qwt_color_map.cpp.

QColor QwtLinearColorMap::color2 ( ) const

Returns: the second color of the color range

See also: setColorInterval()

Definition at line 460 of file qwt_color_map.cpp.

uint QwtLinearColorMap::colorIndex	(	int	numColors,
		const QwtInterval &	interval,
		double	value
	)		const

virtual

Map a value of a given interval into a color index.

Parameters

numColors	Size of the color table
interval	Range for all values
value	Value to map into a color index

Returns: Index, between 0 and 255

Note: NaN values are mapped to 0

Reimplemented from QwtColorMap.

Definition at line 494 of file qwt_color_map.cpp.

QVector< double > QwtLinearColorMap::colorStops ( ) const

Returns: Positions of color stops in increasing order

Definition at line 442 of file qwt_color_map.cpp.

QwtLinearColorMap::Mode QwtLinearColorMap::mode ( ) const

Returns: Mode of the color map

See also: setMode()

Definition at line 400 of file qwt_color_map.cpp.

QRgb QwtLinearColorMap::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.

Definition at line 473 of file qwt_color_map.cpp.

void QwtLinearColorMap::setColorInterval	(	const QColor &	color1,
		const QColor &	color2
	)

Set the color range

Add stops at 0.0 and 1.0.

Parameters

color1	Color used for the minimum value of the value interval
color2	Color used for the maximum value of the value interval

See also: color1(), color2()

Definition at line 415 of file qwt_color_map.cpp.

void QwtLinearColorMap::setMode ( Mode mode )

Set the mode of the color map.

FixedColors means the color is calculated from the next lower color stop. ScaledColors means the color is calculated by interpolating the colors of the adjacent stops.

See also: mode()

Definition at line 391 of file qwt_color_map.cpp.

Member Data Documentation

PrivateData* QwtLinearColorMap::d_data

private

Definition at line 137 of file qwt_color_map.h.

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

Classes

Public Types

Public Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation