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114 lines
4.0 KiB
Python
114 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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SinglePartsToMultiparts.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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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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"""
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from builtins import str
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import QgsFeature, QgsFeatureSink, QgsGeometry, QgsWkbTypes, QgsProcessingUtils, NULL
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterTableField
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from processing.core.outputs import OutputVector
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class SinglePartsToMultiparts(QgisAlgorithm):
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INPUT = 'INPUT'
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FIELD = 'FIELD'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'single_to_multi.png'))
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def group(self):
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return self.tr('Vector geometry tools')
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def __init__(self):
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super().__init__()
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self.addParameter(ParameterVector(self.INPUT, self.tr('Input layer')))
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self.addParameter(ParameterTableField(self.FIELD,
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self.tr('Unique ID field'), self.INPUT))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Multipart')))
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def name(self):
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return 'singlepartstomultipart'
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def displayName(self):
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return self.tr('Singleparts to multipart')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
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fieldName = self.getParameterValue(self.FIELD)
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geomType = QgsWkbTypes.multiType(layer.wkbType())
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(layer.fields(), geomType, layer.crs(),
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context)
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outFeat = QgsFeature()
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inGeom = QgsGeometry()
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index = layer.fields().lookupField(fieldName)
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collection_geom = {}
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collection_attrs = {}
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / layer.featureCount() if layer.featureCount() else 0
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for current, feature in enumerate(features):
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atMap = feature.attributes()
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idVar = atMap[index]
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if idVar in [None, NULL]:
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outFeat.setAttributes(atMap)
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outFeat.setGeometry(feature.geometry())
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writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
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feedback.setProgress(int(current * total))
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continue
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key = str(idVar).strip()
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if key not in collection_geom:
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collection_geom[key] = []
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collection_attrs[key] = atMap
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inGeom = feature.geometry()
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collection_geom[key].append(inGeom)
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feedback.setProgress(int(current * total))
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for key, geoms in collection_geom.items():
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outFeat.setAttributes(collection_attrs[key])
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outFeat.setGeometry(QgsGeometry.collectGeometry(geoms))
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writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
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del writer
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