Gradient color ramp, which smoothly interpolates between two colors and also supports optional extra color stops. More...

#include <qgscolorramp.h>

Inheritance diagram for QgsGradientColorRamp:

[legend]

Public Member Functions
	QgsGradientColorRamp (const QColor &color1=DEFAULT_GRADIENT_COLOR1, const QColor &color2=DEFAULT_GRADIENT_COLOR2, bool discrete=false, const QgsGradientStopsList &stops=QgsGradientStopsList())
	Constructor for QgsGradientColorRamp. More...

void	addStopsToGradient (QGradient *gradient, double opacity=1)
	Copy color ramp stops to a QGradient. More...

QgsGradientColorRamp *	clone () const override
	Creates a clone of the color ramp. More...

QColor	color (double value) const override
	Returns the color corresponding to a specified value. More...

QColor	color1 () const
	Returns the gradient start color. More...

QColor	color2 () const
	Returns the gradient end color. More...

void	convertToDiscrete (bool discrete)
	Converts a gradient with existing color stops to or from discrete interpolation. More...

int	count () const override
	Returns number of defined colors, or -1 if undefined. More...

QgsStringMap	info () const
	Returns any additional info attached to the gradient ramp (e.g., authorship notes) More...

void	invert () override
	Inverts the ordering of the color ramp. More...

bool	isDiscrete () const
	Returns `true` if the gradient is using discrete interpolation, rather than smoothly interpolating between colors. More...

QgsStringMap	properties () const override
	Returns a string map containing all the color ramp's properties. More...

void	setColor1 (const QColor &color)
	Sets the gradient start color. More...

void	setColor2 (const QColor &color)
	Sets the gradient end color. More...

void	setDiscrete (bool discrete)
	Sets whether the gradient should use discrete interpolation, rather than smoothly interpolating between colors. More...

void	setInfo (const QgsStringMap &info)
	Sets additional info to attach to the gradient ramp (e.g., authorship notes) More...

void	setStops (const QgsGradientStopsList &stops)
	Sets the list of intermediate gradient stops for the ramp. More...

QgsGradientStopsList	stops () const
	Returns the list of intermediate gradient stops for the ramp. More...

QString	type () const override
	Returns a string representing the color ramp type. More...

double	value (int index) const override
	Returns relative value between [0,1] of color at specified index. More...

Public Member Functions inherited from QgsColorRamp
virtual	~QgsColorRamp ()=default

Static Public Member Functions
static QgsColorRamp *	create (const QgsStringMap &properties=QgsStringMap())
	Creates a new QgsColorRamp from a map of properties. More...

Protected Attributes
QColor	mColor1

QColor	mColor2

bool	mDiscrete

QgsStringMap	mInfo

QgsGradientStopsList	mStops

Detailed Description

Gradient color ramp, which smoothly interpolates between two colors and also supports optional extra color stops.

Since: QGIS 3.0

Definition at line 139 of file qgscolorramp.h.

Constructor & Destructor Documentation

◆ QgsGradientColorRamp()

QgsGradientColorRamp::QgsGradientColorRamp	(	const QColor &	color1 = `DEFAULT_GRADIENT_COLOR1`,
		const QColor &	color2 = `DEFAULT_GRADIENT_COLOR2`,
		bool	discrete = `false`,
		const QgsGradientStopsList &	stops = `QgsGradientStopsList()`
	)

Constructor for QgsGradientColorRamp.

Parameters

color1	start color, corresponding to a position of 0.0
color2	end color, corresponding to a position of 1.0
discrete	set to `true` for discrete interpolation instead of smoothly interpolating between colors
stops	optional list of additional color stops

Definition at line 44 of file qgscolorramp.cpp.

Member Function Documentation

◆ addStopsToGradient()

void QgsGradientColorRamp::addStopsToGradient	(	QGradient *	gradient,
		double	opacity = `1`
	)

Copy color ramp stops to a QGradient.

Parameters

gradient	gradient to copy stops into
opacity	opacity multiplier. Opacity of colors will be multiplied by this factor before adding to the gradient.

Since: QGIS 2.1

Definition at line 279 of file qgscolorramp.cpp.

◆ clone()

QgsGradientColorRamp * QgsGradientColorRamp::clone ( ) const

overridevirtual

Creates a clone of the color ramp.

Implements QgsColorRamp.

Reimplemented in QgsCptCityColorRamp.

Definition at line 190 of file qgscolorramp.cpp.

◆ color()

QColor QgsGradientColorRamp::color ( double value ) const

overridevirtual

Returns the color corresponding to a specified value.

Parameters

value value between [0, 1] inclusive

Returns: color for value

Implements QgsColorRamp.

Definition at line 117 of file qgscolorramp.cpp.

◆ color1()

QColor QgsGradientColorRamp::color1 ( ) const

inline

Returns the gradient start color.

See also: setColor1(); color2()

Definition at line 172 of file qgscolorramp.h.

◆ color2()

QColor QgsGradientColorRamp::color2 ( ) const

inline

Returns the gradient end color.

See also: setColor2(); color1()

Definition at line 179 of file qgscolorramp.h.

◆ convertToDiscrete()

void QgsGradientColorRamp::convertToDiscrete ( bool discrete )

Converts a gradient with existing color stops to or from discrete interpolation.

Parameters

discrete set to true to convert the gradient stops to discrete, or false to convert them to smooth interpolation

See also: isDiscrete()

Definition at line 224 of file qgscolorramp.cpp.

◆ count()

int QgsGradientColorRamp::count ( ) const

inlineoverridevirtual

Returns number of defined colors, or -1 if undefined.

Implements QgsColorRamp.

Definition at line 159 of file qgscolorramp.h.

◆ create()

QgsColorRamp * QgsGradientColorRamp::create ( const QgsStringMap & properties = QgsStringMap() )

static

Creates a new QgsColorRamp from a map of properties.

Definition at line 53 of file qgscolorramp.cpp.

◆ info()

QgsStringMap QgsGradientColorRamp::info ( ) const

inline

Returns any additional info attached to the gradient ramp (e.g., authorship notes)

See also: setInfo()

Definition at line 241 of file qgscolorramp.h.

◆ invert()

void QgsGradientColorRamp::invert ( )

overridevirtual

Inverts the ordering of the color ramp.

Reimplemented from QgsColorRamp.

Reimplemented in QgsCptCityColorRamp.

Definition at line 163 of file qgscolorramp.cpp.

◆ isDiscrete()

bool QgsGradientColorRamp::isDiscrete ( ) const

inline

Returns true if the gradient is using discrete interpolation, rather than smoothly interpolating between colors.

See also: setDiscrete()

Definition at line 202 of file qgscolorramp.h.

◆ properties()

QgsStringMap QgsGradientColorRamp::properties ( ) const

overridevirtual

Returns a string map containing all the color ramp's properties.

Implements QgsColorRamp.

Reimplemented in QgsCptCityColorRamp.

Definition at line 198 of file qgscolorramp.cpp.

◆ setColor1()

void QgsGradientColorRamp::setColor1 ( const QColor & color )

inline

Sets the gradient start color.

Parameters

color start color

See also: color1(); setColor2()

Definition at line 187 of file qgscolorramp.h.

◆ setColor2()

void QgsGradientColorRamp::setColor2 ( const QColor & color )

inline

Sets the gradient end color.

Parameters

color end color

See also: color2(); setColor1()

Definition at line 195 of file qgscolorramp.h.

◆ setDiscrete()

void QgsGradientColorRamp::setDiscrete ( bool discrete )

inline

Sets whether the gradient should use discrete interpolation, rather than smoothly interpolating between colors.

Parameters

discrete set to true to use discrete interpolation

See also: convertToDiscrete(); isDiscrete()

Definition at line 211 of file qgscolorramp.h.

◆ setInfo()

void QgsGradientColorRamp::setInfo ( const QgsStringMap & info )

inline

Sets additional info to attach to the gradient ramp (e.g., authorship notes)

Parameters

info	map of string info to attach

See also: info()

Definition at line 248 of file qgscolorramp.h.

◆ setStops()

void QgsGradientColorRamp::setStops ( const QgsGradientStopsList & stops )

Sets the list of intermediate gradient stops for the ramp.

Parameters

stops list of stops. Any existing color stops will be replaced. The stop list will be automatically reordered so that stops are listed in ascending offset order.

See also: stops()

Definition at line 271 of file qgscolorramp.cpp.

◆ stops()

QgsGradientStopsList QgsGradientColorRamp::stops ( ) const

inline

Returns the list of intermediate gradient stops for the ramp.

See also: setStops()

Definition at line 235 of file qgscolorramp.h.

◆ type()

QString QgsGradientColorRamp::type ( ) const

inlineoverridevirtual

Returns a string representing the color ramp type.

Implements QgsColorRamp.

Reimplemented in QgsCptCityColorRamp.

Definition at line 162 of file qgscolorramp.h.

◆ value()

double QgsGradientColorRamp::value ( int index ) const

overridevirtual

Returns relative value between [0,1] of color at specified index.

Implements QgsColorRamp.

Definition at line 101 of file qgscolorramp.cpp.

Member Data Documentation

◆ mColor1

QColor QgsGradientColorRamp::mColor1

protected

Definition at line 260 of file qgscolorramp.h.

◆ mColor2

QColor QgsGradientColorRamp::mColor2

protected

Definition at line 261 of file qgscolorramp.h.

◆ mDiscrete

bool QgsGradientColorRamp::mDiscrete

protected

Definition at line 262 of file qgscolorramp.h.

◆ mInfo

QgsStringMap QgsGradientColorRamp::mInfo

protected

Definition at line 264 of file qgscolorramp.h.

◆ mStops

QgsGradientStopsList QgsGradientColorRamp::mStops

protected

Definition at line 263 of file qgscolorramp.h.

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

/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgscolorramp.h
/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgscolorramp.cpp

Public Member Functions

Static Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ QgsGradientColorRamp()

Member Function Documentation

◆ addStopsToGradient()

◆ clone()

◆ color()

◆ color1()

◆ color2()

◆ convertToDiscrete()

◆ count()

◆ create()

◆ info()

◆ invert()

◆ isDiscrete()

◆ properties()

◆ setColor1()

◆ setColor2()

◆ setDiscrete()

◆ setInfo()

◆ setStops()

◆ stops()

◆ type()

◆ value()

Member Data Documentation

◆ mColor1

◆ mColor2

◆ mDiscrete

◆ mInfo

◆ mStops