QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsclassificationstandarddeviation.h
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1/***************************************************************************
2 qgsclassificationstandarddeviation.h
3 ---------------------
4 begin : September 2019
5 copyright : (C) 2019 by Denis Rouzaud
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 QgsClassificationMethod * clone() const =0
Returns a clone of the method.
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 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.