QGIS API Documentation  3.21.0-Master (402cf1129e)
qgsclassificationstandarddeviation.h
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1 /***************************************************************************
2  qgsclassificationstandarddeviation.h
3  ---------------------
4  begin : September 2019
5  copyright : (C) 2019 by Denis Rouzaud
6  email : [email protected]
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #ifndef QGSCLASSIFICATIONSTANDARDDEVIATION_H
17 #define QGSCLASSIFICATIONSTANDARDDEVIATION_H
18 
19 #include "qgis_core.h"
21 
29 {
30  public:
32 
33  QString name() const override;
34  QString id() const override;
35  QgsClassificationMethod *clone() const override;
36  QIcon icon() const override;
37  QString labelForRange( double lowerValue, double upperValue, ClassPosition position ) const override;
38  void writeXml( QDomElement &element, const QgsReadWriteContext &context ) const override;
39  void readXml( const QDomElement &element, const QgsReadWriteContext &context ) override;
40 
41  static const QString METHOD_ID;
42 
43  private:
44  QList<double> calculateBreaks( double &minimum, double &maximum,
45  const QList<double> &values, int nclasses ) override;
46 
47  QString valueToLabel( double value ) const override;
48 
49  double mStdDev = 1.0;
50  double mEffectiveSymmetryPoint = 0.0;
51 };
52 
53 #endif // QGSCLASSIFICATIONSTANDARDDEVIATION_H
QgsClassificationMethod is an abstract class for implementations of classification methods.
virtual QString id() const =0
The id of the method as saved in the project, must be unique in registry.
ClassPosition
Defines the class position.
virtual void readXml(const QDomElement &element, const QgsReadWriteContext &context)
Reads extra information to apply it to the method.
virtual void writeXml(QDomElement &element, const QgsReadWriteContext &context) const
Writes extra information about the method.
virtual QgsClassificationMethod * clone() const =0
Returns a clone of the method.
virtual QString name() const =0
The readable and translate name of the method.
virtual QIcon icon() const
The icon of the method.
virtual QString labelForRange(double lowerValue, double upperValue, ClassPosition position=Inner) const
Returns the label for a range.
QgsClassificationCustom is an implementation of QgsClassificationMethod based on standard deviation.
The class is used as a container of context for various read/write operations on other objects.