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377b181c4e
Also - simplify and add tests - remove large memory leak (persistant store of all non-project layers) - remove broken support for direct loading postgres/virtual layers by string (Python version was very broken and would never match a postgres/virtual layer)
96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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VectorSplit.py
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---------------------
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Date : September 2014
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Copyright : (C) 2014 by Alexander Bruy
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Email : alexander dot bruy 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__ = 'Alexander Bruy'
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__date__ = 'September 2014'
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__copyright__ = '(C) 2014, Alexander Bruy'
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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 processing.core.GeoAlgorithm import GeoAlgorithm
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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 OutputDirectory
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from processing.tools import dataobjects, vector
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from processing.tools.system import mkdir
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class VectorSplit(GeoAlgorithm):
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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', 'split_layer.png'))
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def group(self):
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return self.tr('Vector general tools')
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def name(self):
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return 'splitvectorlayer'
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def displayName(self):
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return self.tr('Split vector layer')
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def defineCharacteristics(self):
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self.addParameter(ParameterVector(self.INPUT,
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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(OutputDirectory(self.OUTPUT, self.tr('Output directory')))
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def processAlgorithm(self, feedback):
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layer = dataobjects.getLayerFromString(
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self.getParameterValue(self.INPUT))
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fieldName = self.getParameterValue(self.FIELD)
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directory = self.getOutputValue(self.OUTPUT)
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mkdir(directory)
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fieldIndex = layer.fields().lookupField(fieldName)
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uniqueValues = vector.uniqueValues(layer, fieldIndex)
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baseName = os.path.join(directory, '{0}_{1}'.format(layer.name(), fieldName))
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fields = layer.fields()
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crs = layer.crs()
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geomType = layer.wkbType()
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total = 100.0 / len(uniqueValues)
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for current, i in enumerate(uniqueValues):
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fName = u'{0}_{1}.shp'.format(baseName, str(i).strip())
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writer = vector.VectorWriter(fName, None, fields, geomType, crs)
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for f in vector.features(layer):
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if f[fieldName] == i:
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writer.addFeature(f)
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del writer
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feedback.setProgress(int(current * total))
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