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[processing] port set M value algorithm to C++
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /*************************************************************************** | ||
| qgsalgorithmsetmvalue.cpp | ||
| --------------------- | ||
| begin : November 2019 | ||
| copyright : (C) 2019 by Alexander Bruy | ||
| email : alexander dot bruy at gmail dot com | ||
| ***************************************************************************/ | ||
|
|
||
| /*************************************************************************** | ||
| * * | ||
| * This program is free software; you can redistribute it and/or modify * | ||
| * it under the terms of the GNU General Public License as published by * | ||
| * the Free Software Foundation; either version 2 of the License, or * | ||
| * (at your option) any later version. * | ||
| * * | ||
| ***************************************************************************/ | ||
|
|
||
| #include "qgsalgorithmsetmvalue.h" | ||
| #include "qgsvectorlayer.h" | ||
|
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| ///@cond PRIVATE | ||
|
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| QString QgsSetMValueAlgorithm::name() const | ||
| { | ||
| return QStringLiteral( "setmvalue" ); | ||
| } | ||
|
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| QString QgsSetMValueAlgorithm::displayName() const | ||
| { | ||
| return QObject::tr( "Set M value" ); | ||
| } | ||
|
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| QStringList QgsSetMValueAlgorithm::tags() const | ||
| { | ||
| return QObject::tr( "set,add,m,measure,values" ).split( ',' ); | ||
| } | ||
|
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| QString QgsSetMValueAlgorithm::group() const | ||
| { | ||
| return QObject::tr( "Vector geometry" ); | ||
| } | ||
|
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| QString QgsSetMValueAlgorithm::groupId() const | ||
| { | ||
| return QStringLiteral( "vectorgeometry" ); | ||
| } | ||
|
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| QString QgsSetMValueAlgorithm::shortHelpString() const | ||
| { | ||
| return QObject::tr( "This algorithm sets the M value for geometries in a layer.\n\n" | ||
| "If M values already exist in the layer, they will be overwritten " | ||
| "with the new value. If no M values exist, the geometry will be " | ||
| "upgraded to include M values and the specified value used as " | ||
| "the initial M value for all geometries." ); | ||
| } | ||
|
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| QString QgsSetMValueAlgorithm::outputName() const | ||
| { | ||
| return QObject::tr( "M Added" ); | ||
| } | ||
|
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| QgsSetMValueAlgorithm *QgsSetMValueAlgorithm::createInstance() const | ||
| { | ||
| return new QgsSetMValueAlgorithm(); | ||
| } | ||
|
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| bool QgsSetMValueAlgorithm::supportInPlaceEdit( const QgsMapLayer *l ) const | ||
| { | ||
| const QgsVectorLayer *layer = qobject_cast< const QgsVectorLayer * >( l ); | ||
| if ( !layer ) | ||
| return false; | ||
|
|
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| return QgsProcessingFeatureBasedAlgorithm::supportInPlaceEdit( l ) && QgsWkbTypes::hasM( layer->wkbType() ); | ||
| } | ||
|
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| QgsProcessingFeatureSource::Flag QgsSetMValueAlgorithm::sourceFlags() const | ||
| { | ||
| return QgsProcessingFeatureSource::FlagSkipGeometryValidityChecks; | ||
| } | ||
|
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| QgsWkbTypes::Type QgsSetMValueAlgorithm::outputWkbType( QgsWkbTypes::Type type ) const | ||
| { | ||
| return QgsWkbTypes::addM( type ); | ||
| } | ||
|
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| void QgsSetMValueAlgorithm::initParameters( const QVariantMap & ) | ||
| { | ||
| auto mValueParam = qgis::make_unique < QgsProcessingParameterNumber >( QStringLiteral( "M_VALUE" ), QObject::tr( "M Value" ), QgsProcessingParameterNumber::Double, 0.0 ); | ||
| mValueParam->setIsDynamic( true ); | ||
| mValueParam->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "M_VALUE" ), QObject::tr( "M Value" ), QgsPropertyDefinition::Double ) ); | ||
| mValueParam->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) ); | ||
| addParameter( mValueParam.release() ); | ||
| } | ||
|
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| bool QgsSetMValueAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * ) | ||
| { | ||
| mMValue = parameterAsDouble( parameters, QStringLiteral( "M_VALUE" ), context ); | ||
| mDynamicMValue = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "M_VALUE" ) ); | ||
| if ( mDynamicMValue ) | ||
| mMValueProperty = parameters.value( QStringLiteral( "M_VALUE" ) ).value< QgsProperty >(); | ||
|
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| return true; | ||
| } | ||
|
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| QgsFeatureList QgsSetMValueAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * ) | ||
| { | ||
| QgsFeature f = feature; | ||
|
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| if ( f.hasGeometry() ) | ||
| { | ||
| std::unique_ptr< QgsAbstractGeometry > newGeometry( f.geometry().constGet()->clone() ); | ||
| // addMValue won't alter existing M values, so drop them first | ||
| if ( QgsWkbTypes::hasM( newGeometry->wkbType() ) ) | ||
| newGeometry->dropMValue(); | ||
|
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| double m = mMValue; | ||
| if ( mDynamicMValue ) | ||
| m = mMValueProperty.valueAsDouble( context.expressionContext(), m ); | ||
|
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| newGeometry->addMValue( m ); | ||
|
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| f.setGeometry( QgsGeometry( std::move( newGeometry ) ) ); | ||
| } | ||
|
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| return QgsFeatureList() << f; | ||
| } | ||
|
|
||
| ///@endcond |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /*************************************************************************** | ||
| qgsalgorithmsetmvalue.h | ||
| --------------------- | ||
| begin : November 2019 | ||
| copyright : (C) 2019 by Alexander Bruy | ||
| email : alexander dot bruy at gmail dot com | ||
| ***************************************************************************/ | ||
|
|
||
| /*************************************************************************** | ||
| * * | ||
| * This program is free software; you can redistribute it and/or modify * | ||
| * it under the terms of the GNU General Public License as published by * | ||
| * the Free Software Foundation; either version 2 of the License, or * | ||
| * (at your option) any later version. * | ||
| * * | ||
| ***************************************************************************/ | ||
|
|
||
| #ifndef QGSALGORITHMSETMVALUE_H | ||
| #define QGSALGORITHMSETMVALUE_H | ||
|
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| #define SIP_NO_FILE | ||
|
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| #include "qgis_sip.h" | ||
| #include "qgsprocessingalgorithm.h" | ||
|
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| ///@cond PRIVATE | ||
|
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| /** | ||
| * Native set M value algorithm. | ||
| */ | ||
| class QgsSetMValueAlgorithm : public QgsProcessingFeatureBasedAlgorithm | ||
| { | ||
|
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| public: | ||
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| QgsSetMValueAlgorithm() = default; | ||
| QString name() const override; | ||
| QString displayName() const override; | ||
| QStringList tags() const override; | ||
| QString group() const override; | ||
| QString groupId() const override; | ||
| QString shortHelpString() const override; | ||
| QgsSetMValueAlgorithm *createInstance() const override SIP_FACTORY; | ||
|
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| protected: | ||
|
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| void initParameters( const QVariantMap &configuration = QVariantMap() ) override; | ||
| QString outputName() const override; | ||
| QgsWkbTypes::Type outputWkbType( QgsWkbTypes::Type inputWkbType ) const override; | ||
| QgsProcessingFeatureSource::Flag sourceFlags() const override; | ||
| bool supportInPlaceEdit( const QgsMapLayer *l ) const override; | ||
|
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| bool prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override; | ||
| QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override; | ||
|
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| private: | ||
|
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| double mMValue = 0.0; | ||
| bool mDynamicMValue = false; | ||
| QgsProperty mMValueProperty; | ||
| }; | ||
|
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| ///@endcond PRIVATE | ||
|
|
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| #endif // QGSALGORITHMSETMVALUE_H |
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