QGIS API Documentation 3.39.0-Master (67e056379ed)
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qgsalgorithmdropmzvalues.cpp
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1/***************************************************************************
2 qgsalgorithmdropmzvalues.cpp
3 ---------------------
4 begin : April 2017
5 copyright : (C) 2017 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
19
21
22QString QgsDropMZValuesAlgorithm::name() const
23{
24 return QStringLiteral( "dropmzvalues" );
25}
26
27QString QgsDropMZValuesAlgorithm::displayName() const
28{
29 return QObject::tr( "Drop M/Z values" );
30}
31
32QStringList QgsDropMZValuesAlgorithm::tags() const
33{
34 return QObject::tr( "drop,set,convert,m,measure,z,25d,3d,values" ).split( ',' );
35}
36
37QString QgsDropMZValuesAlgorithm::group() const
38{
39 return QObject::tr( "Vector geometry" );
40}
41
42QString QgsDropMZValuesAlgorithm::groupId() const
43{
44 return QStringLiteral( "vectorgeometry" );
45}
46
47QString QgsDropMZValuesAlgorithm::outputName() const
48{
49 return QObject::tr( "Z/M Dropped" );
50}
51
52QString QgsDropMZValuesAlgorithm::shortHelpString() const
53{
54 return QObject::tr( "This algorithm can remove any measure (M) or Z values from input geometries." );
55}
56
57QgsDropMZValuesAlgorithm *QgsDropMZValuesAlgorithm::createInstance() const
58{
59 return new QgsDropMZValuesAlgorithm();
60}
61
62bool QgsDropMZValuesAlgorithm::supportInPlaceEdit( const QgsMapLayer *layer ) const
63{
64 Q_UNUSED( layer )
65 return false;
66}
67
68void QgsDropMZValuesAlgorithm::initParameters( const QVariantMap & )
69{
70 addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "DROP_M_VALUES" ), QObject::tr( "Drop M Values" ), false ) );
71 addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "DROP_Z_VALUES" ), QObject::tr( "Drop Z Values" ), false ) );
72}
73
74Qgis::WkbType QgsDropMZValuesAlgorithm::outputWkbType( Qgis::WkbType inputWkbType ) const
75{
76 Qgis::WkbType wkb = inputWkbType;
77 if ( mDropM )
78 wkb = QgsWkbTypes::dropM( wkb );
79 if ( mDropZ )
80 wkb = QgsWkbTypes::dropZ( wkb );
81 return wkb;
82}
83
84Qgis::ProcessingFeatureSourceFlags QgsDropMZValuesAlgorithm::sourceFlags() const
85{
87}
88
89bool QgsDropMZValuesAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback * )
90{
91 mDropM = parameterAsBoolean( parameters, QStringLiteral( "DROP_M_VALUES" ), context );
92 mDropZ = parameterAsBoolean( parameters, QStringLiteral( "DROP_Z_VALUES" ), context );
93 return true;
94}
95
96QgsFeatureList QgsDropMZValuesAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback * )
97{
98 QgsFeature f = feature;
99 if ( f.hasGeometry() )
100 {
101 std::unique_ptr< QgsAbstractGeometry > newGeom( f.geometry().constGet()->clone() );
102 if ( mDropM )
103 newGeom->dropMValue();
104 if ( mDropZ )
105 newGeom->dropZValue();
106 f.setGeometry( QgsGeometry( newGeom.release() ) );
107 }
108
109 return QgsFeatureList() << f;
110}
111
113
@ SkipGeometryValidityChecks
Invalid geometry checks should always be skipped. This flag can be useful for algorithms which always...
WkbType
The WKB type describes the number of dimensions a geometry has.
Definition qgis.h:201
QFlags< ProcessingFeatureSourceFlag > ProcessingFeatureSourceFlags
Flags which control how QgsProcessingFeatureSource fetches features.
Definition qgis.h:3153
virtual QgsAbstractGeometry * clone() const =0
Clones the geometry by performing a deep copy.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition qgsfeature.h:58
QgsGeometry geometry
Definition qgsfeature.h:69
bool hasGeometry() const
Returns true if the feature has an associated geometry.
void setGeometry(const QgsGeometry &geometry)
Set the feature's geometry.
A geometry is the spatial representation of a feature.
const QgsAbstractGeometry * constGet() const
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
Base class for all map layer types.
Definition qgsmaplayer.h:75
Contains information about the context in which a processing algorithm is executed.
Base class for providing feedback from a processing algorithm.
A boolean parameter for processing algorithms.
static Qgis::WkbType dropM(Qgis::WkbType type)
Drops the m dimension (if present) for a WKB type and returns the new type.
static Qgis::WkbType dropZ(Qgis::WkbType type)
Drops the z dimension (if present) for a WKB type and returns the new type.
QList< QgsFeature > QgsFeatureList