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86 lines
3.6 KiB
Python
86 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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AddTableField.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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__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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from sextante.core.GeoAlgorithm import GeoAlgorithm
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from sextante.outputs.OutputVector import OutputVector
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from sextante.parameters.ParameterVector import ParameterVector
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from qgis.core import *
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from sextante.parameters.ParameterString import ParameterString
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from sextante.parameters.ParameterSelection import ParameterSelection
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from sextante.core.QGisLayers import QGisLayers
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import os
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from PyQt4 import QtGui
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class AddTableField(GeoAlgorithm):
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OUTPUT_LAYER = "OUTPUT_LAYER"
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INPUT_LAYER = "INPUT_LAYER"
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FIELD_NAME = "FIELD_NAME"
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FIELD_TYPE = "FIELD_TYPE"
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TYPE_NAMES = ["Integer", "Float", "String"]
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TYPES = [QVariant.Int, QVariant.Double, QVariant.String]
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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 defineCharacteristics(self):
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self.name = "Add field to attributes table"
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self.group = "Algorithms for vector layers"
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self.addParameter(ParameterVector(self.INPUT_LAYER, "Input layer", ParameterVector.VECTOR_TYPE_ANY, False))
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self.addParameter(ParameterString(self.FIELD_NAME, "Field name"))
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self.addParameter(ParameterSelection(self.FIELD_TYPE, "Field type", self.TYPE_NAMES))
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self.addOutput(OutputVector(self.OUTPUT_LAYER, "Output layer"))
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def processAlgorithm(self, progress):
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fieldtype = self.getParameterValue(self.FIELD_TYPE)
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fieldname = self.getParameterValue(self.FIELD_NAME)
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output = self.getOutputFromName(self.OUTPUT_LAYER)
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vlayer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT_LAYER))
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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(fieldname, self.TYPES[fieldtype])
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writer = output.getVectorWriter(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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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() )
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writer.addFeature( outFeat )
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del writer
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