QGIS API Documentation 3.43.0-Master (c67cf405802)
qgsclassificationprettybreaks.h
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1/***************************************************************************
2 qgsclassificationprettybreaks.h
3 ---------------------
4 begin : September 2019
5 copyright : (C) 2019 by Denis Rouzaud
6 email : denis@opengis.ch
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 QGSCLASSIFICATIONPRETTYBREAKS_H
17#define QGSCLASSIFICATIONPRETTYBREAKS_H
18
19#include "qgis_core.h"
21
28{
29 public:
31
32 QString name() const override;
33 QString id() const override;
34 std::unique_ptr< QgsClassificationMethod > clone() const override;
35 QIcon icon() const override;
36
37 bool valuesRequired() const override {return false;}
38
39 private:
40 QList<double> calculateBreaks( double &minimum, double &maximum,
41 const QList<double> &values, int nclasses, QString &error ) override;
42};
43
44#endif // QGSCLASSIFICATIONPRETTYBREAKS_H
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.
virtual std::unique_ptr< 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.
A classification method which applies pretty breaks to data.
bool valuesRequired() const override
Returns if the method requires values to calculate the classes If not, bounds are sufficient.