QGIS API Documentation  3.17.0-Master (ca637cfeb2)
qgsalgorithmzonalstatistics.h
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1 /***************************************************************************
2  qgsalgorithmzonalstatistics.h
3  ------------------------------
4  begin : December 2019
5  copyright : (C) 2019 by Alexander Bruy
6  email : alexander dot bruy at gmail dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSALGORITHMZONALSTATISTICS_H
19 #define QGSALGORITHMZONALSTATISTICS_H
20 
21 #define SIP_NO_FILE
22 
23 #include "qgis_sip.h"
24 #include "qgsprocessingalgorithm.h"
25 #include "qgsvectorlayer.h"
27 
29 
33 class QgsZonalStatisticsAlgorithm : public QgsProcessingAlgorithm
34 {
35 
36  public:
37 
38  QgsZonalStatisticsAlgorithm() = default;
39  Flags flags() const override;
40  QString name() const override;
41  QString displayName() const override;
42  QStringList tags() const override;
43  QString group() const override;
44  QString groupId() const override;
45  QString shortHelpString() const override;
46  void initAlgorithm( const QVariantMap &configuration = QVariantMap() ) override;
47  QgsZonalStatisticsAlgorithm *createInstance() const override SIP_FACTORY;
48 
49  protected:
50  bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
51  QVariantMap processAlgorithm( const QVariantMap &parameters,
52  QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
53 
54  private:
55  std::unique_ptr< QgsRasterInterface > mInterface;
56  int mBand;
57  QString mPrefix;
58  QgsZonalStatistics::Statistics mStats = QgsZonalStatistics::All;
60  double mPixelSizeX;
61  double mPixelSizeY;
62 };
63 
65 
66 #endif // QGSALGORITHMZONALSTATISTICS_H
virtual bool prepareAlgorithm(const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback) SIP_THROW(QgsProcessingException)
Prepares the algorithm to run using the specified parameters.
Base class for providing feedback from a processing algorithm.
virtual QString name() const =0
Returns the algorithm name, used for identifying the algorithm.
virtual QString group() const
Returns the name of the group this algorithm belongs to.
virtual Flags flags() const
Returns the flags indicating how and when the algorithm operates and should be exposed to users...
virtual QStringList tags() const
Returns a list of tags which relate to the algorithm, and are used to assist users in searching for s...
virtual QString shortHelpString() const
Returns a localised short helper string for the algorithm.
Abstract base class for processing algorithms.
virtual void initAlgorithm(const QVariantMap &configuration=QVariantMap())=0
Initializes the algorithm using the specified configuration.
#define SIP_FACTORY
Definition: qgis_sip.h:76
virtual QgsProcessingAlgorithm * createInstance() const =0
Creates a new instance of the algorithm class.
virtual QVariantMap processAlgorithm(const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback) SIP_THROW(QgsProcessingException)=0
Runs the algorithm using the specified parameters.
virtual QString displayName() const =0
Returns the translated algorithm name, which should be used for any user-visible display of the algor...
This class represents a coordinate reference system (CRS).
virtual QString groupId() const
Returns the unique ID of the group this algorithm belongs to.
Contains information about the context in which a processing algorithm is executed.