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m-kuhnm-kuhn
committedJan 18, 2019
Add native polygonstolines algorithm
·
ltr-3_40final-3_6_0
1 parent 8709ab6 commit 4c8af20

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6 files changed

+216
-133
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6 files changed

+216
-133
lines changed
 

‎python/plugins/processing/algs/qgis/PolygonsToLines.py

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This file was deleted.

‎python/plugins/processing/algs/qgis/QgisAlgorithmProvider.py

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from .PointsToPaths import PointsToPaths
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from .PoleOfInaccessibility import PoleOfInaccessibility
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from .Polygonize import Polygonize
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from .PolygonsToLines import PolygonsToLines
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from .PostGISExecuteSQL import PostGISExecuteSQL
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from .PostGISExecuteAndLoadSQL import PostGISExecuteAndLoadSQL
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from .RandomExtract import RandomExtract
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PointsToPaths(),
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PoleOfInaccessibility(),
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Polygonize(),
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PolygonsToLines(),
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PostGISExecuteSQL(),
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PostGISExecuteAndLoadSQL(),
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RandomExtract(),

‎src/analysis/CMakeLists.txt

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@@ -73,6 +73,7 @@ SET(QGIS_ANALYSIS_SRCS
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processing/qgsalgorithmorientedminimumboundingbox.cpp
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processing/qgsalgorithmpackage.cpp
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processing/qgsalgorithmarrayoffsetlines.cpp
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processing/qgsalgorithmpolygonstolines.cpp
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processing/qgsalgorithmpointonsurface.cpp
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processing/qgsalgorithmprojectpointcartesian.cpp
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processing/qgsalgorithmpromotetomultipart.cpp

‎src/analysis/processing/qgsalgorithmpolygonstolines.cpp

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/***************************************************************************
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qgsalgorithmpolygonstolines.cpp
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---------------------
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begin : January 2019
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copyright : (C) 2019 by Matthias Kuhn
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email : matthias@opengis.ch
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsalgorithmpolygonstolines.h"
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#include "qgsgeometrycollection.h"
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#include "qgscurvepolygon.h"
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#include "qgscurve.h"
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#include "qgsmultilinestring.h"
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///@cond PRIVATE
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QString QgsPolygonsToLinesAlgorithm::name() const
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{
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return QStringLiteral( "polygonstolines" );
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}
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QString QgsPolygonsToLinesAlgorithm::displayName() const
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{
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return QObject::tr( "Polygons to lines" );
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}
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QStringList QgsPolygonsToLinesAlgorithm::tags() const
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{
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return QObject::tr( "line,polygon,convert" ).split( ',' );
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}
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QString QgsPolygonsToLinesAlgorithm::group() const
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{
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return QObject::tr( "Vector creation" );
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}
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QString QgsPolygonsToLinesAlgorithm::groupId() const
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{
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return QStringLiteral( "vectorgeometry" );
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}
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QString QgsPolygonsToLinesAlgorithm::outputName() const
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{
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return QObject::tr( "Lines" );
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}
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QString QgsPolygonsToLinesAlgorithm::shortHelpString() const
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{
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return QObject::tr( "Converts polygons to lines" );
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}
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QString QgsPolygonsToLinesAlgorithm::shortDescription() const
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{
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return QObject::tr( "Converts polygons to lines." );
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}
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QgsPolygonsToLinesAlgorithm *QgsPolygonsToLinesAlgorithm::createInstance() const
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{
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return new QgsPolygonsToLinesAlgorithm();
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}
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QList<int> QgsPolygonsToLinesAlgorithm::inputLayerTypes() const
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{
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return QList< int >() << QgsProcessing::TypeVectorPolygon;
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}
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QgsFeatureList QgsPolygonsToLinesAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * )
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{
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QgsFeatureList result;
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QgsFeature feat = feature;
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if ( feat.hasGeometry() )
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feat.setGeometry( convertToLines( feat.geometry() ) );
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result << feat;
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return result;
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}
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QgsGeometry QgsPolygonsToLinesAlgorithm::convertToLines( const QgsGeometry &geometry ) const
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{
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auto rings = extractRings( geometry.constGet() );
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QgsWkbTypes::Type resultType = outWkbType( geometry.wkbType() );
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std::unique_ptr<QgsMultiCurve> lineGeometry;
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if ( QgsWkbTypes::flatType( resultType ) == QgsWkbTypes::MultiLineString )
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lineGeometry = qgis::make_unique<QgsMultiLineString>();
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else
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lineGeometry = qgis::make_unique<QgsMultiCurve>();
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for ( auto ring : qgis::as_const( rings ) )
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lineGeometry->addGeometry( ring );
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return QgsGeometry( lineGeometry.release() );
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}
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QgsWkbTypes::Type QgsPolygonsToLinesAlgorithm::outWkbType( QgsWkbTypes::Type polygonWkbType ) const
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{
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QgsWkbTypes::Type wkbType = QgsWkbTypes::NoGeometry;
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if ( QgsWkbTypes::singleType( QgsWkbTypes::flatType( polygonWkbType ) ) == QgsWkbTypes::Polygon )
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wkbType = QgsWkbTypes::MultiLineString;
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else if ( QgsWkbTypes::singleType( QgsWkbTypes::flatType( polygonWkbType ) ) == QgsWkbTypes::CurvePolygon )
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wkbType = QgsWkbTypes::MultiCurve;
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if ( QgsWkbTypes::hasM( polygonWkbType ) )
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wkbType = QgsWkbTypes::addM( wkbType );
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if ( QgsWkbTypes::hasZ( polygonWkbType ) )
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wkbType = QgsWkbTypes::addZ( wkbType );
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return wkbType;
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}
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QList<QgsCurve *> QgsPolygonsToLinesAlgorithm::extractRings( const QgsAbstractGeometry *geom ) const
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{
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QList<QgsCurve *> rings;
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if ( QgsGeometryCollection *collection = qgsgeometry_cast<QgsGeometryCollection *>( geom ) )
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{
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for ( int i = 0; i < collection->numGeometries(); ++i )
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{
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rings.append( extractRings( collection->geometryN( i ) ) );
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}
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}
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else if ( QgsCurvePolygon *polygon = qgsgeometry_cast<QgsCurvePolygon *>( geom ) )
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{
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rings.append( polygon->exteriorRing()->clone() );
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for ( int i = 0; i < polygon->numInteriorRings(); ++i )
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{
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rings.append( polygon->interiorRing( i )->clone() );
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}
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}
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return rings;
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}
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///@endcond
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‎src/analysis/processing/qgsalgorithmpolygonstolines.h

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/***************************************************************************
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qgsalgorithmpolygontolines.h
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---------------------
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begin : January 2019
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copyright : (C) 2019 by Matthias Kuhn
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email : matthias@opengis.ch
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef QGSALGORITHMPOLYGONSTOLINES_H
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#define QGSALGORITHMPOLYGONSTOLINES_H
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#define SIP_NO_FILE
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#include "qgis.h"
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#include "qgsprocessingalgorithm.h"
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///@cond PRIVATE
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/**
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* Native convert polygons to lines algorithm
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*/
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class QgsPolygonsToLinesAlgorithm : public QgsProcessingFeatureBasedAlgorithm
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{
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public:
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QgsPolygonsToLinesAlgorithm() = default;
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QString name() const override;
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QString displayName() const override;
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QStringList tags() const override;
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QString group() const override;
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QString groupId() const override;
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QString shortHelpString() const override;
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QString shortDescription() const override;
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QgsPolygonsToLinesAlgorithm *createInstance() const override SIP_FACTORY;
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QList<int> inputLayerTypes() const override;
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protected:
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QString outputName() const override;
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QgsFeatureList processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
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private:
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QgsGeometry convertToLines( const QgsGeometry &geometry ) const;
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QList<QgsCurve *> extractRings( const QgsAbstractGeometry *geom ) const;
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QgsWkbTypes::Type outWkbType( QgsWkbTypes::Type polygonWkbType ) const;
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friend class TestQgsProcessingAlgs;
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};
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///@endcond PRIVATE
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#endif // QGSALGORITHMPOLYGONSTOLINES_H
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‎src/analysis/processing/qgsnativealgorithms.cpp

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#include "qgsalgorithmvectorize.h"
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#include "qgsalgorithmwedgebuffers.h"
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#include "qgsalgorithmzonalhistogram.h"
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#include "qgsalgorithmpolygonstolines.h"
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///@cond PRIVATE
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addAlgorithm( new QgsVariableWidthBufferByMAlgorithm() );
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addAlgorithm( new QgsWedgeBuffersAlgorithm() );
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addAlgorithm( new QgsZonalHistogramAlgorithm() );
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addAlgorithm( new QgsPolygonsToLinesAlgorithm() );
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}
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