QGIS API Documentation 3.39.0-Master (be2050b798e)
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Public Member Functions | Static Public Member Functions | List of all members
QgsRasterSingleColorRenderer Class Reference

Raster renderer which renders all data pixels using a single color. More...

#include <qgsrastersinglecolorrenderer.h>

Inheritance diagram for QgsRasterSingleColorRenderer:
Inheritance graph
[legend]

Public Member Functions

 QgsRasterSingleColorRenderer (const QgsRasterSingleColorRenderer &)=delete
 QgsRasterSingleColorRenderer cannot be copied. Use clone() instead.
 
 QgsRasterSingleColorRenderer (QgsRasterInterface *input, int band, const QColor &color)
 Creates a single color renderer.
 
QgsRasterBlockblock (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override
 Read block of data using given extent and size.
 
QgsRasterSingleColorRendererclone () const override
 Clone itself, create deep copy.
 
QColor color () const
 Returns the single color used by the renderer.
 
Qgis::RasterRendererFlags flags () const override
 Returns flags which dictate renderer behavior.
 
int inputBand () const override
 Returns the input band for the renderer, or -1 if no input band is available.
 
const QgsRasterSingleColorRendereroperator= (const QgsRasterSingleColorRenderer &)=delete
 QgsRasterSingleColorRenderer cannot be copied. Use clone() instead.
 
void setColor (const QColor &color)
 Sets the single color used by the renderer.
 
bool setInputBand (int band) override
 Attempts to set the input band for the renderer.
 
QList< int > usesBands () const override
 Returns a list of band numbers used by the renderer.
 
void writeXml (QDomDocument &doc, QDomElement &parentElem) const override
 Write base class members to xml.
 
- Public Member Functions inherited from QgsRasterRenderer
 QgsRasterRenderer (const QgsRasterRenderer &)=delete
 QgsRasterRenderer cannot be copied. Use clone() instead.
 
 QgsRasterRenderer (QgsRasterInterface *input=nullptr, const QString &type=QString())
 Constructor for QgsRasterRenderer.
 
 ~QgsRasterRenderer () override
 
virtual bool accept (QgsStyleEntityVisitorInterface *visitor) const
 Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer.
 
int alphaBand () const
 
int bandCount () const override
 Gets number of bands.
 
virtual bool canCreateRasterAttributeTable () const
 Returns true if the renderer is suitable for attribute table creation.
 
void copyCommonProperties (const QgsRasterRenderer *other, bool copyMinMaxOrigin=true)
 Copies common properties like opacity / transparency data from other renderer.
 
virtual QList< QgsLayerTreeModelLegendNode * > createLegendNodes (QgsLayerTreeLayer *nodeLayer)
 Creates a set of legend nodes representing the renderer.
 
Qgis::DataType dataType (int bandNo) const override
 Returns data type for the band specified by number.
 
virtual QList< QPair< QString, QColor > > legendSymbologyItems () const
 Returns symbology items if provided by renderer.
 
const QgsRasterMinMaxOriginminMaxOrigin () const
 Returns const reference to origin of min/max values.
 
QColor nodataColor () const
 Returns the color to use for shading nodata pixels.
 
double opacity () const
 Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).
 
const QgsRasterRendereroperator= (const QgsRasterRenderer &)=delete
 QgsRasterRenderer cannot be copied. Use clone() instead.
 
const QgsRasterTransparencyrasterTransparency () const
 
void readXml (const QDomElement &rendererElem) override
 Sets base class members from xml. Usually called from create() methods of subclasses.
 
void setAlphaBand (int band)
 
bool setInput (QgsRasterInterface *input) override
 Set input.
 
void setMinMaxOrigin (const QgsRasterMinMaxOrigin &origin)
 Sets origin of min/max values.
 
void setNodataColor (const QColor &color)
 Sets the color to use for shading nodata pixels.
 
void setOpacity (double opacity)
 Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque).
 
void setRasterTransparency (QgsRasterTransparency *t)
 
virtual void toSld (QDomDocument &doc, QDomElement &element, const QVariantMap &props=QVariantMap()) const
 Used from subclasses to create SLD Rule elements following SLD v1.0 specs.
 
virtual QString type () const
 Returns a unique string representation of the renderer type.
 
bool usesTransparency () const
 
- Public Member Functions inherited from QgsRasterInterface
 QgsRasterInterface (QgsRasterInterface *input=nullptr)
 
virtual ~QgsRasterInterface ()=default
 
Q_DECL_DEPRECATED QgsRasterBandStats bandStatistics (int bandNo, int stats, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, QgsRasterBlockFeedback *feedback=nullptr)
 Returns the band statistics.
 
virtual QgsRasterBandStats bandStatistics (int bandNo, Qgis::RasterBandStatistics stats=Qgis::RasterBandStatistic::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, QgsRasterBlockFeedback *feedback=nullptr)
 Returns the band statistics.
 
virtual Qgis::RasterInterfaceCapabilities capabilities () const
 Returns the capabilities supported by the interface.
 
Q_DECL_DEPRECATED QString capabilitiesString () const
 Returns the raster interface capabilities in friendly format.
 
virtual QString colorInterpretationName (int bandNumber) const
 Returns the name of the color interpretation for the specified bandNumber.
 
virtual void cumulativeCut (int bandNo, double lowerCount, double upperCount, double &lowerValue, double &upperValue, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
 Find values for cumulative pixel count cut.
 
int dataTypeSize (int bandNo) const
 Returns the size (in bytes) for the data type for the specified band.
 
QString displayBandName (int bandNumber) const
 Generates a friendly, descriptive name for the specified bandNumber.
 
virtual QgsRectangle extent () const
 Gets the extent of the interface.
 
virtual QString generateBandName (int bandNumber) const
 helper function to create zero padded band names
 
virtual bool hasHistogram (int bandNo, int binCount, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false)
 Returns true if histogram is available (cached, already calculated)
 
Q_DECL_DEPRECATED bool hasStatistics (int bandNo, int stats, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
 Returns true if histogram is available (cached, already calculated).
 
virtual bool hasStatistics (int bandNo, Qgis::RasterBandStatistics stats=Qgis::RasterBandStatistic::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
 Returns true if histogram is available (cached, already calculated).
 
virtual QgsRasterHistogram histogram (int bandNo, int binCount=0, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false, QgsRasterBlockFeedback *feedback=nullptr)
 Returns a band histogram.
 
virtual QgsRasterInterfaceinput () const
 Current input.
 
virtual bool on () const
 Returns whether the interface is on or off.
 
virtual void setOn (bool on)
 Sets whether the interface is on or off.
 
virtual Qgis::DataType sourceDataType (int bandNo) const
 Returns source data type for the band specified by number, source data type may be shorter than dataType.
 
virtual QgsRasterInterfacesourceInput ()
 Gets source / raw input, the first in pipe, usually provider.
 
virtual const QgsRasterInterfacesourceInput () const
 Gets source / raw input, the first in pipe, usually provider.
 
virtual int xBlockSize () const
 Gets block size.
 
virtual int xSize () const
 Gets raster size.
 
virtual int yBlockSize () const
 
virtual int ySize () const
 

Static Public Member Functions

static QgsRasterRenderercreate (const QDomElement &elem, QgsRasterInterface *input)
 Creates an instance of the renderer based on definition from XML (used by the renderer registry)
 

Additional Inherited Members

- Static Public Attributes inherited from QgsRasterRenderer
static const QRgb NODATA_COLOR = qRgba( 0, 0, 0, 0 )
 
- Protected Member Functions inherited from QgsRasterRenderer
void _writeXml (QDomDocument &doc, QDomElement &rasterRendererElem) const
 Write upper class info into rasterrenderer element (called by writeXml method of subclasses)
 
QRgb renderColorForNodataPixel () const
 Returns the color for the renderer to use to represent nodata pixels.
 
- Protected Member Functions inherited from QgsRasterInterface
void initHistogram (QgsRasterHistogram &histogram, int bandNo, int binCount, double minimum=std::numeric_limits< double >::quiet_NaN(), double maximum=std::numeric_limits< double >::quiet_NaN(), const QgsRectangle &boundingBox=QgsRectangle(), int sampleSize=0, bool includeOutOfRange=false)
 Fill in histogram defaults if not specified.
 
Q_DECL_DEPRECATED void initStatistics (QgsRasterBandStats &statistics, int bandNo, int stats, const QgsRectangle &boundingBox=QgsRectangle(), int binCount=0) const
 Fill in statistics defaults if not specified.
 
void initStatistics (QgsRasterBandStats &statistics, int bandNo, Qgis::RasterBandStatistics stats=Qgis::RasterBandStatistic::All, const QgsRectangle &boundingBox=QgsRectangle(), int binCount=0) const
 Fill in statistics defaults if not specified.
 
- Protected Attributes inherited from QgsRasterRenderer
int mAlphaBand = -1
 Read alpha value from band.
 
QgsRasterMinMaxOrigin mMinMaxOrigin
 Origin of min/max values.
 
double mOpacity = 1.0
 Global alpha value (0-1)
 
QgsRasterTransparencymRasterTransparency = nullptr
 Raster transparency per color or value. Overwrites global alpha value.
 
QString mType
 
- Protected Attributes inherited from QgsRasterInterface
QList< QgsRasterHistogrammHistograms
 List of cached histograms, all bands mixed.
 
QgsRasterInterfacemInput = nullptr
 
bool mOn = true
 
QList< QgsRasterBandStatsmStatistics
 List of cached statistics, all bands mixed.
 

Detailed Description

Raster renderer which renders all data pixels using a single color.

Since
QGIS 3.38

Definition at line 34 of file qgsrastersinglecolorrenderer.h.

Constructor & Destructor Documentation

◆ QgsRasterSingleColorRenderer() [1/2]

QgsRasterSingleColorRenderer::QgsRasterSingleColorRenderer ( QgsRasterInterface input,
int  band,
const QColor &  color 
)

Creates a single color renderer.

Definition at line 25 of file qgsrastersinglecolorrenderer.cpp.

◆ QgsRasterSingleColorRenderer() [2/2]

QgsRasterSingleColorRenderer::QgsRasterSingleColorRenderer ( const QgsRasterSingleColorRenderer )
delete

QgsRasterSingleColorRenderer cannot be copied. Use clone() instead.

Member Function Documentation

◆ block()

QgsRasterBlock * QgsRasterSingleColorRenderer::block ( int  bandNo,
const QgsRectangle extent,
int  width,
int  height,
QgsRasterBlockFeedback feedback = nullptr 
)
overridevirtual

Read block of data using given extent and size.

Returns pointer to data. Caller is responsible to free the memory returned.

Parameters
bandNoband number
extentextent of block
widthpixel width of block
heightpixel height of block
feedbackoptional raster feedback object for cancellation/preview. Added in QGIS 3.0.

Implements QgsRasterRenderer.

Definition at line 59 of file qgsrastersinglecolorrenderer.cpp.

◆ clone()

QgsRasterSingleColorRenderer * QgsRasterSingleColorRenderer::clone ( ) const
overridevirtual

Clone itself, create deep copy.

Implements QgsRasterRenderer.

Definition at line 32 of file qgsrastersinglecolorrenderer.cpp.

◆ color()

QColor QgsRasterSingleColorRenderer::color ( ) const

Returns the single color used by the renderer.

See also
setColor()

Definition at line 141 of file qgsrastersinglecolorrenderer.cpp.

◆ create()

QgsRasterRenderer * QgsRasterSingleColorRenderer::create ( const QDomElement &  elem,
QgsRasterInterface input 
)
static

Creates an instance of the renderer based on definition from XML (used by the renderer registry)

Definition at line 44 of file qgsrastersinglecolorrenderer.cpp.

◆ flags()

Qgis::RasterRendererFlags QgsRasterSingleColorRenderer::flags ( ) const
overridevirtual

Returns flags which dictate renderer behavior.

Since
QGIS 3.28

Reimplemented from QgsRasterRenderer.

Definition at line 39 of file qgsrastersinglecolorrenderer.cpp.

◆ inputBand()

int QgsRasterSingleColorRenderer::inputBand ( ) const
overridevirtual

Returns the input band for the renderer, or -1 if no input band is available.

For renderers which utilize multiple input bands -1 will be returned. In these cases usesBands() will return a list of all utilized bands (including alpha bands).

See also
setInputBand()
usesBands()
Since
QGIS 3.38

Reimplemented from QgsRasterRenderer.

Definition at line 162 of file qgsrastersinglecolorrenderer.cpp.

◆ operator=()

const QgsRasterSingleColorRenderer & QgsRasterSingleColorRenderer::operator= ( const QgsRasterSingleColorRenderer )
delete

QgsRasterSingleColorRenderer cannot be copied. Use clone() instead.

◆ setColor()

void QgsRasterSingleColorRenderer::setColor ( const QColor &  color)

Sets the single color used by the renderer.

See also
color()

Definition at line 136 of file qgsrastersinglecolorrenderer.cpp.

◆ setInputBand()

bool QgsRasterSingleColorRenderer::setInputBand ( int  band)
overridevirtual

Attempts to set the input band for the renderer.

Returns true if the band was successfully set, or false if the band could not be set.

Note
Not all renderers support setting the input band.
See also
inputBand()
usesBands()
Since
QGIS 3.38

Reimplemented from QgsRasterRenderer.

Definition at line 167 of file qgsrastersinglecolorrenderer.cpp.

◆ usesBands()

QList< int > QgsRasterSingleColorRenderer::usesBands ( ) const
overridevirtual

Returns a list of band numbers used by the renderer.

See also
setInputBand()

Reimplemented from QgsRasterRenderer.

Definition at line 177 of file qgsrastersinglecolorrenderer.cpp.

◆ writeXml()

void QgsRasterSingleColorRenderer::writeXml ( QDomDocument &  doc,
QDomElement &  parentElem 
) const
overridevirtual

Write base class members to xml.

Reimplemented from QgsRasterInterface.

Definition at line 146 of file qgsrastersinglecolorrenderer.cpp.


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