Implementation of a logarithmic scale method. More...
#include <qgsclassificationlogarithmic.h>
Inheritance diagram for QgsClassificationLogarithmic:
Public Types | |
| enum | NegativeValueHandling { NoHandling = 0, Discard, PrependBreak } |
| Handling of negative and 0 values in the method. More... | |
 Public Types inherited from QgsClassificationMethod | |
| enum | ClassPosition { LowerBound, Inner, UpperBound } |
| Defines the class position. More... | |
| enum | MethodProperty { NoFlag = 0, ValuesNotRequired = 1 << 1, SymmetricModeAvailable = 1 << 2, IgnoresClassCount = 1 << 3 } |
| Flags for the classification method. More... | |
Public Member Functions | |
| QgsClassificationLogarithmic () | |
| QgsClassificationMethod * | clone () const override |
| Returns a clone of the method. More... | |
| QIcon | icon () const override |
| The icon of the method. More... | |
| QString | id () const override |
| The id of the method as saved in the project, must be unique in registry. More... | |
| QString | labelForRange (double lowerValue, double upperValue, ClassPosition position) const override |
| Returns the label for a range. More... | |
| QString | name () const override |
| The readable and translate name of the method. More... | |
| bool | valuesRequired () const override |
| Returns if the method requires values to calculate the classes If not, bounds are sufficient. More... | |
| Public Member Functions inherited from QgsClassificationMethod | |
| QgsClassificationMethod (MethodProperties properties=NoFlag, int codeComplexity=1) | |
| Creates a classification method. More... | |
| virtual | ~QgsClassificationMethod () |
| QList< QgsClassificationRange > | classes (const QgsVectorLayer *layer, const QString &expression, int nclasses) |
| This will calculate the classes for a given layer to define the classes. More... | |
| QList< QgsClassificationRange > | classes (const QList< double > &values, int nclasses) |
| This will calculate the classes for a list of values. More... | |
| QList< QgsClassificationRange > | classes (double minimum, double maximum, int nclasses) |
| This will calculate the classes for defined bounds without any values. More... | |
| int | codeComplexity () const |
| Code complexity as the exponent in Big O notation. More... | |
| QgsClassificationMethod::MethodProperties | flags () const |
| Returns the classification flags. More... | |
| QString | labelFormat () const |
| Returns the format of the label for the classes. More... | |
| QString | labelForRange (const QgsRendererRange &range, ClassPosition position=Inner) const |
| Returns the label for a range. More... | |
| int | labelPrecision () const |
| Returns the precision for the formatting of the labels. More... | |
| bool | labelTrimTrailingZeroes () const |
| Returns if the trailing 0 are trimmed in the label. More... | |
| const QgsProcessingParameterDefinition * | parameterDefinition (const QString ¶meterName) const |
| Returns the parameter from its name. More... | |
| QgsProcessingParameterDefinitions | parameterDefinitions () const |
| Returns the list of parameters. More... | |
| QVariantMap | parameterValues () const |
| Returns the values of the processing parameters. More... | |
| virtual void | readXml (const QDomElement &element, const QgsReadWriteContext &context) |
| Reads extra information to apply it to the method. More... | |
| QDomElement | save (QDomDocument &doc, const QgsReadWriteContext &context) const |
| Saves the method to a DOM element and return it. More... | |
| void | setLabelFormat (const QString &format) |
| Defines the format of the labels for the classes, using %1 and %2 for the bounds. More... | |
| void | setLabelPrecision (int labelPrecision) |
| Defines the precision for the formatting of the labels. More... | |
| void | setLabelTrimTrailingZeroes (bool trimTrailingZeroes) |
| Defines if the trailing 0 are trimmed in the label. More... | |
| void | setParameterValues (const QVariantMap &values) |
| Defines the values of the additional parameters. More... | |
| void | setSymmetricMode (bool enabled, double symmetryPoint=0, bool symmetryAstride=false) |
| Defines if the symmetric mode is enables and configures its parameters. More... | |
| bool | symmetricModeAvailable () const |
| Returns if the method supports symmetric calculation. More... | |
| bool | symmetricModeEnabled () const |
| Returns if the symmetric mode is enabled. More... | |
| 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. More... | |
| double | symmetryPoint () const |
| Returns the symmetry point for symmetric mode. More... | |
| virtual void | writeXml (QDomElement &element, const QgsReadWriteContext &context) const |
| Writes extra information about the method. More... | |
Additional Inherited Members | |
| 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. More... | |
| 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. More... | |
| static QList< double > | rangesToBreaks (const QList< QgsClassificationRange > &classes) |
| Transforms a list of classes to a list of breaks. More... | |
| Static Public Attributes inherited from QgsClassificationMethod | |
| static const int | MAX_PRECISION = 15 |
| static const int | MIN_PRECISION = -6 |
| Protected Member Functions inherited from QgsClassificationMethod | |
| void | addParameter (QgsProcessingParameterDefinition *definition) |
| Add a parameter to the method. More... | |
| void | copyBase (QgsClassificationMethod *c) const |
| Copy the parameters (shall be used in clone implementation) More... | |
| QString | formatNumber (double value) const |
| Format the number according to label properties. More... | |
Detailed Description
Implementation of a logarithmic scale method.
- Since
- QGIS 3.10
Definition at line 28 of file qgsclassificationlogarithmic.h.
Member Enumeration Documentation
◆ NegativeValueHandling
Handling of negative and 0 values in the method.
- Since
- QGIS 3.12
| Enumerator | |
|---|---|
| NoHandling | No handling. |
| Discard | Negative values are discarded - this will require all values. |
| PrependBreak | Prepend an extra break to include negative values - this will require all values. |
Definition at line 49 of file qgsclassificationlogarithmic.h.
Constructor & Destructor Documentation
◆ QgsClassificationLogarithmic()
| QgsClassificationLogarithmic::QgsClassificationLogarithmic | ( | ) |
Definition at line 24 of file qgsclassificationlogarithmic.cpp.
Member Function Documentation
◆ clone()
|
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 32 of file qgsclassificationlogarithmic.cpp.
◆ icon()
|
overridevirtual |
The icon of the method.
Reimplemented from QgsClassificationMethod.
Definition at line 49 of file qgsclassificationlogarithmic.cpp.
◆ id()
|
overridevirtual |
The id of the method as saved in the project, must be unique in registry.
Implements QgsClassificationMethod.
Definition at line 44 of file qgsclassificationlogarithmic.cpp.
◆ labelForRange()
|
overridevirtual |
Returns the label for a range.
Reimplemented from QgsClassificationMethod.
Definition at line 141 of file qgsclassificationlogarithmic.cpp.
◆ name()
|
overridevirtual |
The readable and translate name of the method.
Implements QgsClassificationMethod.
Definition at line 39 of file qgsclassificationlogarithmic.cpp.
◆ valuesRequired()
|
overridevirtual |
Returns if the method requires values to calculate the classes If not, bounds are sufficient.
Reimplemented from QgsClassificationMethod.
Definition at line 160 of file qgsclassificationlogarithmic.cpp.
The documentation for this class was generated from the following files:
- /build/qgis-3.26.3+32focal/src/core/classification/qgsclassificationlogarithmic.h
- /build/qgis-3.26.3+32focal/src/core/classification/qgsclassificationlogarithmic.cpp
