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63 lines
2.6 KiB
Python
63 lines
2.6 KiB
Python
from sextante.core.GeoAlgorithm import GeoAlgorithm
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from PyQt4.QtCore import *
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from qgis.core import *
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from sextante.parameters.ParameterVector import ParameterVector
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from sextante.core.QGisLayers import QGisLayers
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from sextante.outputs.OutputVector import OutputVector
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import os
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from PyQt4 import QtGui
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from sextante.parameters.ParameterTableField import ParameterTableField
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class AutoincrementalField(GeoAlgorithm):
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INPUT = "INPUT"
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OUTPUT = "OUTPUT"
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FIELD = "FIELD"
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def getIcon(self):
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return QtGui.QIcon(os.path.dirname(__file__) + "/../images/toolbox.png")
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def processAlgorithm(self, progress):
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field_index = self.getParameterValue(self.FIELD)
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settings = QSettings()
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systemEncoding = settings.value( "/UI/encoding", "System" ).toString()
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output = self.getOutputValue(self.OUTPUT)
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vlayer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT))
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vprovider = vlayer.dataProvider()
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allAttrs = vprovider.attributeIndexes()
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vprovider.select( allAttrs )
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fields = vprovider.fields()
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fields[len(fields)] = QgsField("NUM_FIELD", QVariant.Int)
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writer = QgsVectorFileWriter( output, systemEncoding,fields, vprovider.geometryType(), vprovider.crs() )
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inFeat = QgsFeature()
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outFeat = QgsFeature()
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inGeom = QgsGeometry()
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nFeat = vprovider.featureCount()
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nElement = 0
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classes = {}
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while vprovider.nextFeature(inFeat):
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progress.setPercentage(int((100 * nElement)/nFeat))
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nElement += 1
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atMap = inFeat.attributeMap()
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clazz = atMap[field_index]
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if not clazz in classes.keys:
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classes[clazz] = len(classes.keys())
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while vprovider.nextFeature(inFeat):
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progress.setPercentage(int((100 * nElement)/nFeat))
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nElement += 1
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inGeom = inFeat.geometry()
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outFeat.setGeometry( inGeom )
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atMap = inFeat.attributeMap()
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outFeat.setAttributeMap( atMap )
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outFeat.addAttribute( len(vprovider.fields()), QVariant(nElement) )
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writer.addFeature( outFeat )
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del writer
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def defineCharacteristics(self):
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self.name = "Add autoincremental field"
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self.group = "Algorithms for vector layers"
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self.addParameter(ParameterVector(self.INPUT, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
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self.addParameter(ParameterTableField(self.FIELD, "Unique ID Field", self.INPUT))
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self.addOutput(OutputVector(self.OUTPUT, "Output layer"))
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