QGIS API Documentation 3.29.0-Master (ade4f0cf0f)
Public Member Functions | Static Public Member Functions | List of all members
QgsSingleBandPseudoColorRenderer Class Reference

Raster renderer pipe for single band pseudocolor. More...

#include <qgssinglebandpseudocolorrenderer.h>

Inheritance diagram for QgsSingleBandPseudoColorRenderer:
Inheritance graph
[legend]

Public Member Functions

 QgsSingleBandPseudoColorRenderer (const QgsSingleBandPseudoColorRenderer &)=delete
 QgsSingleBandPseudoColorRenderer cannot be copied. Use clone() instead. More...
 
 QgsSingleBandPseudoColorRenderer (QgsRasterInterface *input, int band=-1, QgsRasterShader *shader=nullptr)
 Note: takes ownership of QgsRasterShader. More...
 
bool accept (QgsStyleEntityVisitorInterface *visitor) const override
 Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer. More...
 
int band () const
 Returns the band used by the renderer. More...
 
QgsRasterBlockblock (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override
 Read block of data using given extent and size. More...
 
bool canCreateRasterAttributeTable () const override
 Returns true if the renderer is suitable for attribute table creation. More...
 
double classificationMax () const
 
double classificationMin () const
 
QgsSingleBandPseudoColorRendererclone () const override
 Clone itself, create deep copy. More...
 
QList< QgsLayerTreeModelLegendNode * > createLegendNodes (QgsLayerTreeLayer *nodeLayer) override
 Creates a set of legend nodes representing the renderer. More...
 
void createShader (QgsColorRamp *colorRamp=nullptr, QgsColorRampShader::Type colorRampType=QgsColorRampShader::Interpolated, QgsColorRampShader::ClassificationMode classificationMode=QgsColorRampShader::Continuous, int classes=0, bool clip=false, const QgsRectangle &extent=QgsRectangle())
 Creates a color ramp shader. More...
 
Qgis::RasterRendererFlags flags () const override
 Returns flags which dictate renderer behavior. More...
 
QList< QPair< QString, QColor > > legendSymbologyItems () const override
 Returns symbology items if provided by renderer. More...
 
const QgsSingleBandPseudoColorRendereroperator= (const QgsSingleBandPseudoColorRenderer &)=delete
 QgsSingleBandPseudoColorRenderer cannot be copied. Use clone() instead. More...
 
void setBand (int bandNo)
 Sets the band used by the renderer. More...
 
void setClassificationMax (double max)
 
void setClassificationMin (double min)
 
void setShader (QgsRasterShader *shader)
 Takes ownership of the shader. More...
 
QgsRasterShadershader ()
 Returns the raster shader. More...
 
const QgsRasterShadershader () const
 
void toSld (QDomDocument &doc, QDomElement &element, const QVariantMap &props=QVariantMap()) const override
 Used from subclasses to create SLD Rule elements following SLD v1.0 specs. More...
 
QList< int > usesBands () const override
 Returns a list of band numbers used by the renderer. More...
 
void writeXml (QDomDocument &doc, QDomElement &parentElem) const override
 Write base class members to xml. More...
 
- Public Member Functions inherited from QgsRasterRenderer
 QgsRasterRenderer (const QgsRasterRenderer &)=delete
 QgsRasterRenderer cannot be copied. Use clone() instead. More...
 
 QgsRasterRenderer (QgsRasterInterface *input=nullptr, const QString &type=QString())
 Constructor for QgsRasterRenderer. More...
 
 ~QgsRasterRenderer () override
 
virtual bool accept (QgsStyleEntityVisitorInterface *visitor) const
 Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer. More...
 
int alphaBand () const
 
int bandCount () const override
 Gets number of bands. More...
 
QgsRasterBlockblock (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr) override=0
 Read block of data using given extent and size. More...
 
virtual bool canCreateRasterAttributeTable () const
 Returns true if the renderer is suitable for attribute table creation. More...
 
QgsRasterRendererclone () const override=0
 Clone itself, create deep copy. More...
 
void copyCommonProperties (const QgsRasterRenderer *other, bool copyMinMaxOrigin=true)
 Copies common properties like opacity / transparency data from other renderer. More...
 
virtual QList< QgsLayerTreeModelLegendNode * > createLegendNodes (QgsLayerTreeLayer *nodeLayer)
 Creates a set of legend nodes representing the renderer. More...
 
Qgis::DataType dataType (int bandNo) const override
 Returns data type for the band specified by number. More...
 
virtual Qgis::RasterRendererFlags flags () const
 Returns flags which dictate renderer behavior. More...
 
virtual QList< QPair< QString, QColor > > legendSymbologyItems () const
 Returns symbology items if provided by renderer. More...
 
const QgsRasterMinMaxOriginminMaxOrigin () const
 Returns const reference to origin of min/max values. More...
 
QColor nodataColor () const
 Returns the color to use for shading nodata pixels. More...
 
double opacity () const
 Returns the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More...
 
const QgsRasterRendereroperator= (const QgsRasterRenderer &)=delete
 QgsRasterRenderer cannot be copied. Use clone() instead. More...
 
const QgsRasterTransparencyrasterTransparency () const
 
void readXml (const QDomElement &rendererElem) override
 Sets base class members from xml. Usually called from create() methods of subclasses. More...
 
void setAlphaBand (int band)
 
bool setInput (QgsRasterInterface *input) override
 Set input. More...
 
void setMinMaxOrigin (const QgsRasterMinMaxOrigin &origin)
 Sets origin of min/max values. More...
 
void setNodataColor (const QColor &color)
 Sets the color to use for shading nodata pixels. More...
 
void setOpacity (double opacity)
 Sets the opacity for the renderer, where opacity is a value between 0 (totally transparent) and 1.0 (fully opaque). More...
 
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. More...
 
virtual QString type () const
 Returns a unique string representation of the renderer type. More...
 
virtual QList< int > usesBands () const
 Returns a list of band numbers used by the renderer. More...
 
bool usesTransparency () const
 
- Public Member Functions inherited from QgsRasterInterface
 QgsRasterInterface (QgsRasterInterface *input=nullptr)
 
virtual ~QgsRasterInterface ()=default
 
virtual int bandCount () const =0
 Gets number of bands. More...
 
virtual QgsRasterBandStats bandStatistics (int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0, QgsRasterBlockFeedback *feedback=nullptr)
 Returns the band statistics. More...
 
virtual QgsRasterBlockblock (int bandNo, const QgsRectangle &extent, int width, int height, QgsRasterBlockFeedback *feedback=nullptr)=0
 Read block of data using given extent and size. More...
 
virtual int capabilities () const
 Returns a bitmask containing the supported capabilities. More...
 
QString capabilitiesString () const
 Returns the raster interface capabilities in friendly format. More...
 
virtual QgsRasterInterfaceclone () const =0
 Clone itself, create deep copy. More...
 
virtual QString colorInterpretationName (int bandNumber) const
 Returns the name of the color interpretation for the specified bandNumber. More...
 
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. More...
 
virtual Qgis::DataType dataType (int bandNo) const =0
 Returns data type for the band specified by number. More...
 
int dataTypeSize (int bandNo) const
 Returns the size (in bytes) for the data type for the specified band. More...
 
QString displayBandName (int bandNumber) const
 Generates a friendly, descriptive name for the specified bandNumber. More...
 
virtual QgsRectangle extent () const
 Gets the extent of the interface. More...
 
virtual QString generateBandName (int bandNumber) const
 helper function to create zero padded band names More...
 
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) More...
 
virtual bool hasStatistics (int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &extent=QgsRectangle(), int sampleSize=0)
 Returns true if histogram is available (cached, already calculated). More...
 
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. More...
 
virtual QgsRasterInterfaceinput () const
 Current input. More...
 
virtual bool on () const
 Returns whether the interface is on or off. More...
 
virtual void readXml (const QDomElement &filterElem)
 Sets base class members from xml. Usually called from create() methods of subclasses. More...
 
virtual bool setInput (QgsRasterInterface *input)
 Set input. More...
 
virtual void setOn (bool on)
 Sets whether the interface is on or off. More...
 
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. More...
 
virtual QgsRasterInterfacesourceInput ()
 Gets source / raw input, the first in pipe, usually provider. More...
 
virtual const QgsRasterInterfacesourceInput () const
 Gets source / raw input, the first in pipe, usually provider. More...
 
virtual void writeXml (QDomDocument &doc, QDomElement &parentElem) const
 Write base class members to xml. More...
 
virtual int xBlockSize () const
 Gets block size. More...
 
virtual int xSize () const
 Gets raster size. More...
 
virtual int yBlockSize () const
 
virtual int ySize () const
 

Static Public Member Functions

static QgsRasterRenderercreate (const QDomElement &elem, QgsRasterInterface *input)
 

Additional Inherited Members

- Public Types inherited from QgsRasterInterface
enum  Capability {
  NoCapabilities = 0 , Size = 1 << 1 , Create = 1 << 2 , Remove = 1 << 3 ,
  BuildPyramids = 1 << 4 , Identify = 1 << 5 , IdentifyValue = 1 << 6 , IdentifyText = 1 << 7 ,
  IdentifyHtml = 1 << 8 , IdentifyFeature = 1 << 9 , Prefetch = 1 << 10
}
 If you add to this, please also add to capabilitiesString() More...
 
- 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) More...
 
QRgb renderColorForNodataPixel () const
 Returns the color for the renderer to use to represent nodata pixels. More...
 
- 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. More...
 
void initStatistics (QgsRasterBandStats &statistics, int bandNo, int stats=QgsRasterBandStats::All, const QgsRectangle &boundingBox=QgsRectangle(), int binCount=0) const
 Fill in statistics defaults if not specified. More...
 
- Protected Attributes inherited from QgsRasterRenderer
int mAlphaBand = -1
 Read alpha value from band. More...
 
QgsRasterMinMaxOrigin mMinMaxOrigin
 Origin of min/max values. More...
 
double mOpacity = 1.0
 Global alpha value (0-1) More...
 
QgsRasterTransparencymRasterTransparency = nullptr
 Raster transparency per color or value. Overwrites global alpha value. More...
 
QString mType
 
- Protected Attributes inherited from QgsRasterInterface
QList< QgsRasterHistogrammHistograms
 List of cached histograms, all bands mixed. More...
 
QgsRasterInterfacemInput = nullptr
 
bool mOn = true
 
QList< QgsRasterBandStatsmStatistics
 List of cached statistics, all bands mixed. More...
 

Detailed Description

Raster renderer pipe for single band pseudocolor.

Definition at line 35 of file qgssinglebandpseudocolorrenderer.h.

Constructor & Destructor Documentation

◆ QgsSingleBandPseudoColorRenderer() [1/2]

QgsSingleBandPseudoColorRenderer::QgsSingleBandPseudoColorRenderer ( QgsRasterInterface input,
int  band = -1,
QgsRasterShader shader = nullptr 
)

Note: takes ownership of QgsRasterShader.

Definition at line 31 of file qgssinglebandpseudocolorrenderer.cpp.

◆ QgsSingleBandPseudoColorRenderer() [2/2]

QgsSingleBandPseudoColorRenderer::QgsSingleBandPseudoColorRenderer ( const QgsSingleBandPseudoColorRenderer )
delete

QgsSingleBandPseudoColorRenderer cannot be copied. Use clone() instead.

Member Function Documentation

◆ accept()

bool QgsSingleBandPseudoColorRenderer::accept ( QgsStyleEntityVisitorInterface visitor) const
overridevirtual

Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer.

Returns true if the visitor should continue visiting other objects, or false if visiting should be canceled.

Since
QGIS 3.10

Reimplemented from QgsRasterRenderer.

Definition at line 411 of file qgssinglebandpseudocolorrenderer.cpp.

◆ band()

int QgsSingleBandPseudoColorRenderer::band ( ) const
inline

Returns the band used by the renderer.

Since
QGIS 2.7

Definition at line 92 of file qgssinglebandpseudocolorrenderer.h.

◆ block()

QgsRasterBlock * QgsSingleBandPseudoColorRenderer::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 199 of file qgssinglebandpseudocolorrenderer.cpp.

◆ canCreateRasterAttributeTable()

bool QgsSingleBandPseudoColorRenderer::canCreateRasterAttributeTable ( ) const
overridevirtual

Returns true if the renderer is suitable for attribute table creation.

The default implementation returns false.

Since
QGIS 3.30

Reimplemented from QgsRasterRenderer.

Definition at line 472 of file qgssinglebandpseudocolorrenderer.cpp.

◆ classificationMax()

double QgsSingleBandPseudoColorRenderer::classificationMax ( ) const
inline

Definition at line 102 of file qgssinglebandpseudocolorrenderer.h.

◆ classificationMin()

double QgsSingleBandPseudoColorRenderer::classificationMin ( ) const
inline

Definition at line 101 of file qgssinglebandpseudocolorrenderer.h.

◆ clone()

QgsSingleBandPseudoColorRenderer * QgsSingleBandPseudoColorRenderer::clone ( ) const
overridevirtual

Clone itself, create deep copy.

Implements QgsRasterRenderer.

Definition at line 80 of file qgssinglebandpseudocolorrenderer.cpp.

◆ create()

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

Definition at line 129 of file qgssinglebandpseudocolorrenderer.cpp.

◆ createLegendNodes()

QList< QgsLayerTreeModelLegendNode * > QgsSingleBandPseudoColorRenderer::createLegendNodes ( QgsLayerTreeLayer nodeLayer)
overridevirtual

Creates a set of legend nodes representing the renderer.

The default implementation calls legendSymbologyItems() and creates corresponding legend nodes for each returned symbology item.

Subclasses can override this to return more legend nodes which better represent the renderer.

Since
QGIS 3.18

Reimplemented from QgsRasterRenderer.

Definition at line 423 of file qgssinglebandpseudocolorrenderer.cpp.

◆ createShader()

void QgsSingleBandPseudoColorRenderer::createShader ( QgsColorRamp colorRamp = nullptr,
QgsColorRampShader::Type  colorRampType = QgsColorRampShader::Interpolated,
QgsColorRampShader::ClassificationMode  classificationMode = QgsColorRampShader::Continuous,
int  classes = 0,
bool  clip = false,
const QgsRectangle extent = QgsRectangle() 
)

Creates a color ramp shader.

Parameters
colorRampvector color ramp. Ownership is transferred to the shader.
colorRampTypetype of color ramp shader
classificationModeclassification mode
classesnumber of classes
clipclip out of range values
extentextent used in classification (only used in quantile mode)

Definition at line 113 of file qgssinglebandpseudocolorrenderer.cpp.

◆ flags()

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

Returns flags which dictate renderer behavior.

Since
QGIS 3.28

Reimplemented from QgsRasterRenderer.

Definition at line 103 of file qgssinglebandpseudocolorrenderer.cpp.

◆ legendSymbologyItems()

QList< QPair< QString, QColor > > QgsSingleBandPseudoColorRenderer::legendSymbologyItems ( ) const
overridevirtual

Returns symbology items if provided by renderer.

See also
createLegendNodes()

Reimplemented from QgsRasterRenderer.

Definition at line 313 of file qgssinglebandpseudocolorrenderer.cpp.

◆ operator=()

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

QgsSingleBandPseudoColorRenderer cannot be copied. Use clone() instead.

◆ setBand()

void QgsSingleBandPseudoColorRenderer::setBand ( int  bandNo)

Sets the band used by the renderer.

See also
band
Since
QGIS 2.10

Definition at line 40 of file qgssinglebandpseudocolorrenderer.cpp.

◆ setClassificationMax()

void QgsSingleBandPseudoColorRenderer::setClassificationMax ( double  max)

Definition at line 67 of file qgssinglebandpseudocolorrenderer.cpp.

◆ setClassificationMin()

void QgsSingleBandPseudoColorRenderer::setClassificationMin ( double  min)

Definition at line 54 of file qgssinglebandpseudocolorrenderer.cpp.

◆ setShader()

void QgsSingleBandPseudoColorRenderer::setShader ( QgsRasterShader shader)

Takes ownership of the shader.

Definition at line 108 of file qgssinglebandpseudocolorrenderer.cpp.

◆ shader() [1/2]

QgsRasterShader * QgsSingleBandPseudoColorRenderer::shader ( )
inline

Returns the raster shader.

Definition at line 58 of file qgssinglebandpseudocolorrenderer.h.

◆ shader() [2/2]

const QgsRasterShader * QgsSingleBandPseudoColorRenderer::shader ( ) const
inline
Note
available in Python as constShader

Definition at line 61 of file qgssinglebandpseudocolorrenderer.h.

◆ toSld()

void QgsSingleBandPseudoColorRenderer::toSld ( QDomDocument &  doc,
QDomElement &  element,
const QVariantMap &  props = QVariantMap() 
) const
overridevirtual

Used from subclasses to create SLD Rule elements following SLD v1.0 specs.

Since
QGIS 3.6

Reimplemented from QgsRasterRenderer.

Definition at line 337 of file qgssinglebandpseudocolorrenderer.cpp.

◆ usesBands()

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

Returns a list of band numbers used by the renderer.

Reimplemented from QgsRasterRenderer.

Definition at line 327 of file qgssinglebandpseudocolorrenderer.cpp.

◆ writeXml()

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

Write base class members to xml.

Reimplemented from QgsRasterInterface.

Definition at line 293 of file qgssinglebandpseudocolorrenderer.cpp.


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