QGIS API Documentation  3.21.0-Master (56b4176581)
qgsalgorithmarrayoffsetlines.h
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1 /***************************************************************************
2  qgsalgorithmarrayoffsetlines.h
3  ---------------------
4  begin : July 2018
5  copyright : (C) 2018 by Nyall Dawson
6  email : nyall dot dawson 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 QGSALGORITHMARRAYOFFSETLINES_H
19 #define QGSALGORITHMARRAYOFFSETLINES_H
20 
21 #define SIP_NO_FILE
22 
23 #include "qgis_sip.h"
24 #include "qgsprocessingalgorithm.h"
25 
27 
31 class QgsCreateArrayOffsetLinesAlgorithm : public QgsProcessingFeatureBasedAlgorithm
32 {
33 
34  public:
35 
36  QgsCreateArrayOffsetLinesAlgorithm() = 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  QString shortDescription() const override;
44  QgsCreateArrayOffsetLinesAlgorithm *createInstance() const override SIP_FACTORY;
45  void initParameters( const QVariantMap &configuration = QVariantMap() ) override;
46  QList<int> inputLayerTypes() const override;
47 
48  protected:
49  QString outputName() const override;
50  bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
51  QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
52  QgsFields outputFields( const QgsFields &inputFields ) const override;
53  QgsFeatureSink::SinkFlags sinkFlags() const override;
54 
55  private:
56 
57  int mCount = 0;
58  bool mDynamicCount = false;
59  QgsProperty mCountProperty;
60 
61  double mOffsetStep = 0.0;
62  bool mDynamicOffset = false;
63  QgsProperty mOffsetStepProperty;
64 
65  int mSegments = 8;
66  Qgis::JoinStyle mJoinStyle = Qgis::JoinStyle::Round;
67  double mMiterLimit = 2;
68 
69 
70 };
71 
72 
74 
75 #endif // QGSALGORITHMARRAYOFFSETLINES_H
76 
77 
JoinStyle
Join styles for buffers.
Definition: qgis.h:712
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Container of fields for a vector layer.
Definition: qgsfields.h:45
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 shortDescription() const
Returns an optional translated short description of 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 QgsProcessingAlgorithm * createInstance() const =0
Creates a new instance of the algorithm class.
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.
Definition: qgsproperty.h:232
#define SIP_FACTORY
Definition: qgis_sip.h:76
QList< QgsFeature > QgsFeatureList
Definition: qgsfeature.h:834