QGIS API Documentation 3.39.0-Master (67e056379ed)
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qgsalgorithmmultiringconstantbuffer.h
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1/***************************************************************************
2 qgsalgorithmmultiringconstantbuffer.h
3 -------------------------
4 begin : February 2018
5 copyright : (C) 2018 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 QGSALGORITHMMULTIRINGCONSTANTBUFFER_H
19#define QGSALGORITHMMULTIRINGCONSTANTBUFFER_H
20
21#define SIP_NO_FILE
22
23#include "qgis_sip.h"
25
27
31class QgsMultiRingConstantBufferAlgorithm : public QgsProcessingFeatureBasedAlgorithm
32{
33
34 public:
35
36 QgsMultiRingConstantBufferAlgorithm() = default;
37 QString name() const override;
38 QString displayName() const override;
39 QStringList tags() const override;
40 QString group() const override;
41 QString groupId() const override;
42 QString shortHelpString() const override;
43 QgsMultiRingConstantBufferAlgorithm *createInstance() const override SIP_FACTORY;
44 void initParameters( const QVariantMap &configuration = QVariantMap() ) override;
45 bool supportInPlaceEdit( const QgsMapLayer *layer ) const override;
46
47 protected:
48
49 QString outputName() const override;
50 QgsFields outputFields( const QgsFields &inputFields ) const override;
51 Qgis::ProcessingSourceType outputLayerType() const override { return Qgis::ProcessingSourceType::VectorPolygon; }
52 Qgis::ProcessingFeatureSourceFlags sourceFlags() const override;
53 QgsFeatureSink::SinkFlags sinkFlags() const override;
54 Qgis::WkbType outputWkbType( Qgis::WkbType inputWkbType ) const override { Q_UNUSED( inputWkbType ) return Qgis::WkbType::MultiPolygon; }
55 bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
56 QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
57
58 private:
59 int mRingsNumber = 0;
60 bool mDynamicRingsNumber = false;
61 QgsProperty mRingsNumberProperty;
62
63 double mDistance = 0.0;
64 bool mDynamicDistance = false;
65 QgsProperty mDistanceProperty;
66
67};
68
70
71#endif // QGSALGORITHMMULTIRINGCONSTANTBUFFER_H
72
73
ProcessingSourceType
Processing data source types.
Definition qgis.h:3000
@ VectorPolygon
Vector polygon layers.
WkbType
The WKB type describes the number of dimensions a geometry has.
Definition qgis.h:201
@ MultiPolygon
MultiPolygon.
QFlags< ProcessingFeatureSourceFlag > ProcessingFeatureSourceFlags
Flags which control how QgsProcessingFeatureSource fetches features.
Definition qgis.h:3153
QFlags< SinkFlag > SinkFlags
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition qgsfeature.h:58
Container of fields for a vector layer.
Definition qgsfields.h:46
Base class for all map layer types.
Definition qgsmaplayer.h:75
virtual QgsProcessingAlgorithm * createInstance() const =0
Creates a new instance of the algorithm class.
virtual QString group() const
Returns the name of the group this algorithm belongs to.
virtual QString groupId() const
Returns the unique ID of the group this algorithm belongs to.
virtual QString shortHelpString() const
Returns a localised short helper string for the algorithm.
virtual QString displayName() const =0
Returns the translated algorithm name, which should be used for any user-visible display of the algor...
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 name() const =0
Returns the algorithm name, used for identifying the algorithm.
Contains information about the context in which a processing algorithm is executed.
An abstract QgsProcessingAlgorithm base class for processing algorithms which operate "feature-by-fea...
Base class for providing feedback from a processing algorithm.
A store for object properties.
#define SIP_FACTORY
Definition qgis_sip.h:76
QList< QgsFeature > QgsFeatureList