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118 lines
5.0 KiB
Python
118 lines
5.0 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 qgis.PyQt.QtCore import QVariant
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from qgis.core import (QgsField,
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QgsFeature,
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QgsApplication,
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QgsProcessingUtils,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterString,
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QgsProcessingParameterNumber,
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QgsProcessingParameterEnum,
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QgsProcessingParameterFeatureSink,
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QgsProcessingOutputVectorLayer)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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class AddTableField(QgisAlgorithm):
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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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FIELD_LENGTH = 'FIELD_LENGTH'
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FIELD_PRECISION = 'FIELD_PRECISION'
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TYPES = [QVariant.Int, QVariant.Double, QVariant.String]
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def icon(self):
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return QgsApplication.getThemeIcon("/providerQgis.svg")
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def svgIconPath(self):
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return QgsApplication.iconPath("providerQgis.svg")
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def group(self):
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return self.tr('Vector table tools')
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def __init__(self):
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super().__init__()
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self.type_names = [self.tr('Integer'),
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self.tr('Float'),
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self.tr('String')]
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT_LAYER,
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self.tr('Input layer')))
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self.addParameter(QgsProcessingParameterString(self.FIELD_NAME,
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self.tr('Field name')))
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self.addParameter(QgsProcessingParameterEnum(self.FIELD_TYPE,
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self.tr('Field type'), self.type_names))
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self.addParameter(QgsProcessingParameterNumber(self.FIELD_LENGTH,
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self.tr('Field length'), QgsProcessingParameterNumber.Integer,
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10, False, 1, 255))
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self.addParameter(QgsProcessingParameterNumber(self.FIELD_PRECISION,
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self.tr('Field precision'), QgsProcessingParameterNumber.Integer, 0, False, 0, 10))
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self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT_LAYER, self.tr('Added')))
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self.addOutput(QgsProcessingOutputVectorLayer(self.OUTPUT_LAYER, self.tr('Added')))
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def name(self):
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return 'addfieldtoattributestable'
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def displayName(self):
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return self.tr('Add field to attributes table')
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def processAlgorithm(self, parameters, context, feedback):
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source = self.parameterAsSource(parameters, self.INPUT_LAYER, context)
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fieldType = self.parameterAsEnum(parameters, self.FIELD_TYPE, context)
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fieldName = self.parameterAsString(parameters, self.FIELD_NAME, context)
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fieldLength = self.parameterAsInt(parameters, self.FIELD_LENGTH, context)
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fieldPrecision = self.parameterAsInt(parameters, self.FIELD_PRECISION, context)
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fields = source.fields()
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fields.append(QgsField(fieldName, self.TYPES[fieldType], '',
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fieldLength, fieldPrecision))
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(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT_LAYER, context,
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fields, source.wkbType(), source.sourceCrs())
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features = source.getFeatures()
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total = 100.0 / source.featureCount()
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for current, input_feature in enumerate(features):
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if feedback.isCanceled():
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break
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output_feature = input_feature
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attributes = input_feature.attributes()
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attributes.append(None)
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output_feature.setAttributes(attributes)
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sink.addFeature(output_feature)
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feedback.setProgress(int(current * total))
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return {self.OUTPUT_LAYER: dest_id}
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