QgsClassificationCustom is an implementation of QgsClassificationMethod based on standard deviation. More...

#include <qgsclassificationstandarddeviation.h>

Inheritance diagram for QgsClassificationStandardDeviation:

Public Member Functions
	QgsClassificationStandardDeviation ()

QgsClassificationMethod *	clone () const override
	Returns a clone of the method.

QIcon	icon () const override
	The icon of the method.

QString	id () const override
	The id of the method as saved in the project, must be unique in registry.

QString	labelForRange (double lowerValue, double upperValue, ClassPosition position) const override
	Returns the label for a range.

QString	name () const override
	The readable and translate name of the method.

void	readXml (const QDomElement &element, const QgsReadWriteContext &context) override
	Reads extra information to apply it to the method.

void	writeXml (QDomElement &element, const QgsReadWriteContext &context) const override
	Writes extra information about the method.

Public Member Functions inherited from QgsClassificationMethod
	QgsClassificationMethod (MethodProperties properties=NoFlag, int codeComplexity=1)
	Creates a classification method.

virtual	~QgsClassificationMethod ()

Q_DECL_DEPRECATED QList< QgsClassificationRange >	classes (const QgsVectorLayer *layer, const QString &expression, int nclasses)
	This will calculate the classes for a given layer to define the classes.

QList< QgsClassificationRange >	classes (const QList< double > &values, int nclasses)
	This will calculate the classes for a list of values.

QList< QgsClassificationRange >	classes (double minimum, double maximum, int nclasses)
	This will calculate the classes for defined bounds without any values.

QList< QgsClassificationRange >	classesV2 (const QgsVectorLayer *layer, const QString &expression, int nclasses, QString &error)
	This will calculate the classes for a given layer to define the classes.

int	codeComplexity () const
	Code complexity as the exponent in Big O notation.

QgsClassificationMethod::MethodProperties	flags () const
	Returns the classification flags.

QString	labelFormat () const
	Returns the format of the label for the classes.

QString	labelForRange (const QgsRendererRange &range, ClassPosition position=Inner) const
	Returns the label for a range.

int	labelPrecision () const
	Returns the precision for the formatting of the labels.

bool	labelTrimTrailingZeroes () const
	Returns if the trailing 0 are trimmed in the label.

const QgsProcessingParameterDefinition *	parameterDefinition (const QString &parameterName) const
	Returns the parameter from its name.

QgsProcessingParameterDefinitions	parameterDefinitions () const
	Returns the list of parameters.

QVariantMap	parameterValues () const
	Returns the values of the processing parameters.

QDomElement	save (QDomDocument &doc, const QgsReadWriteContext &context) const
	Saves the method to a DOM element and return it.

void	setLabelFormat (const QString &format)
	Defines the format of the labels for the classes, using %1 and %2 for the bounds.

void	setLabelPrecision (int labelPrecision)
	Defines the precision for the formatting of the labels.

void	setLabelTrimTrailingZeroes (bool trimTrailingZeroes)
	Defines if the trailing 0 are trimmed in the label.

void	setParameterValues (const QVariantMap &values)
	Defines the values of the additional parameters.

void	setSymmetricMode (bool enabled, double symmetryPoint=0, bool symmetryAstride=false)
	Defines if the symmetric mode is enables and configures its parameters.

bool	symmetricModeAvailable () const
	Returns if the method supports symmetric calculation.

bool	symmetricModeEnabled () const
	Returns if the symmetric mode is enabled.

bool	symmetryAstride () const
	Returns if the symmetric mode is astride if `true`, it will remove the symmetry point break so that the 2 classes form only one.

double	symmetryPoint () const
	Returns the symmetry point for symmetric mode.

virtual bool	valuesRequired () const
	Returns if the method requires values to calculate the classes If not, bounds are sufficient.

Static Public Attributes
static const QString	METHOD_ID = QStringLiteral( "StdDev" )

Static Public Attributes inherited from QgsClassificationMethod
static const int	MAX_PRECISION = 15

static const int	MIN_PRECISION = -6

Additional Inherited Members
Public Types inherited from QgsClassificationMethod
enum	ClassPosition { LowerBound , Inner , UpperBound }
	Defines the class position. More...

typedef QFlags< MethodProperty >	MethodProperties

enum	MethodProperty { NoFlag = 0 , ValuesNotRequired = 1 << 1 , SymmetricModeAvailable = 1 << 2 , IgnoresClassCount = 1 << 3 }
	Flags for the classification method. More...

Static Public Member Functions inherited from QgsClassificationMethod
static QgsClassificationMethod *	create (const QDomElement &element, const QgsReadWriteContext &context)
	Reads the DOM element and return a new classification method from it.

static void	makeBreaksSymmetric (QList< double > &breaks, double symmetryPoint, bool astride)
	Remove the breaks that are above the existing opposite sign classes to keep colors symmetrically balanced around symmetryPoint Does not put a break on the symmetryPoint.

static QList< double >	rangesToBreaks (const QList< QgsClassificationRange > &classes)
	Transforms a list of classes to a list of breaks.

Protected Member Functions inherited from QgsClassificationMethod
void	addParameter (QgsProcessingParameterDefinition *definition)
	Add a parameter to the method.

void	copyBase (QgsClassificationMethod *c) const
	Copy the parameters (shall be used in clone implementation)

QString	formatNumber (double value) const
	Format the number according to label properties.

Detailed Description

QgsClassificationCustom is an implementation of QgsClassificationMethod based on standard deviation.

Since: QGIS 3.10

Definition at line 28 of file qgsclassificationstandarddeviation.h.

Constructor & Destructor Documentation

◆ QgsClassificationStandardDeviation()

QgsClassificationStandardDeviation::QgsClassificationStandardDeviation ( )

Definition at line 25 of file qgsclassificationstandarddeviation.cpp.

Member Function Documentation

◆ clone()

QgsClassificationMethod * QgsClassificationStandardDeviation::clone ( ) const

overridevirtual

Returns a clone of the method.

Implementation can take advantage of copyBase method which copies the parameters of the base class

Implements QgsClassificationMethod.

Definition at line 41 of file qgsclassificationstandarddeviation.cpp.

◆ icon()

QIcon QgsClassificationStandardDeviation::icon ( ) const

overridevirtual

The icon of the method.

Reimplemented from QgsClassificationMethod.

Definition at line 49 of file qgsclassificationstandarddeviation.cpp.

◆ id()

QString QgsClassificationStandardDeviation::id ( ) const

overridevirtual

The id of the method as saved in the project, must be unique in registry.

Implements QgsClassificationMethod.

Definition at line 36 of file qgsclassificationstandarddeviation.cpp.

◆ labelForRange()

QString QgsClassificationStandardDeviation::labelForRange	(	double	lowerValue,
		double	upperValue,
		QgsClassificationMethod::ClassPosition	position
	)		const

overridevirtual

Returns the label for a range.

Reimplemented from QgsClassificationMethod.

Definition at line 100 of file qgsclassificationstandarddeviation.cpp.

◆ name()

QString QgsClassificationStandardDeviation::name ( ) const

overridevirtual

The readable and translate name of the method.

Implements QgsClassificationMethod.

Definition at line 31 of file qgsclassificationstandarddeviation.cpp.

◆ readXml()

void QgsClassificationStandardDeviation::readXml	(	const QDomElement &	element,
		const QgsReadWriteContext &	context
	)

overridevirtual

Reads extra information to apply it to the method.

Reimplemented from QgsClassificationMethod.

Definition at line 137 of file qgsclassificationstandarddeviation.cpp.

◆ writeXml()

void QgsClassificationStandardDeviation::writeXml	(	QDomElement &	element,
		const QgsReadWriteContext &	context
	)		const

overridevirtual

Writes extra information about the method.

Reimplemented from QgsClassificationMethod.

Definition at line 129 of file qgsclassificationstandarddeviation.cpp.

Member Data Documentation

◆ METHOD_ID

const QString QgsClassificationStandardDeviation::METHOD_ID = QStringLiteral( "StdDev" )

static

Definition at line 41 of file qgsclassificationstandarddeviation.h.

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

/build/qgis-3.41.0+git20241110+fda2aa46e9a+99sid/src/core/classification/qgsclassificationstandarddeviation.h
/build/qgis-3.41.0+git20241110+fda2aa46e9a+99sid/src/core/classification/qgsclassificationstandarddeviation.cpp

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QgsClassificationStandardDeviation()

Member Function Documentation

◆ clone()

◆ icon()

◆ id()

◆ labelForRange()

◆ name()

◆ readXml()

◆ writeXml()

Member Data Documentation

◆ METHOD_ID