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AutoincrementalField.py
82 lines (67 loc) · 3.06 KB
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AutoincrementalField.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
AutoincrementalField.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from qgis.PyQt.QtCore import QVariant
from qgis.core import (QgsField,
QgsFeature,
QgsApplication,
QgsProcessingUtils)
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.parameters import ParameterVector
from processing.core.outputs import OutputVector
from processing.tools import dataobjects, vector
class AutoincrementalField(GeoAlgorithm):
INPUT = 'INPUT'
OUTPUT = 'OUTPUT'
def icon(self):
return QgsApplication.getThemeIcon("/providerQgis.svg")
def svgIconPath(self):
return QgsApplication.iconPath("providerQgis.svg")
def group(self):
return self.tr('Vector table tools')
def name(self):
return 'addautoincrementalfield'
def displayName(self):
return self.tr('Add autoincremental field')
def defineCharacteristics(self):
self.addParameter(ParameterVector(self.INPUT,
self.tr('Input layer')))
self.addOutput(OutputVector(self.OUTPUT, self.tr('Incremented')))
def processAlgorithm(self, context, feedback):
output = self.getOutputFromName(self.OUTPUT)
vlayer = \
dataobjects.QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
fields = vlayer.fields()
fields.append(QgsField('AUTO', QVariant.Int))
writer = output.getVectorWriter(fields, vlayer.wkbType(), vlayer.crs(), context)
outFeat = QgsFeature()
features = QgsProcessingUtils.getFeatures(vlayer, context)
total = 100.0 / QgsProcessingUtils.featureCount(vlayer, context)
for current, feat in enumerate(features):
feedback.setProgress(int(current * total))
geom = feat.geometry()
outFeat.setGeometry(geom)
attrs = feat.attributes()
attrs.append(current)
outFeat.setAttributes(attrs)
writer.addFeature(outFeat)
del writer