mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-04 00:30:59 -05:00
b1cadb1822
have specific icons, instead of generic qgis icon We consider these 'top level' algorithms, and using the standard algorithm icon should help reflect this and differentiate them from 3rd party algorithms.
91 lines
3.4 KiB
Python
91 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
EquivalentNumField.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,
|
|
QgsFeatureSink,
|
|
QgsApplication,
|
|
QgsProcessingUtils)
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterTableField
|
|
from processing.core.outputs import OutputVector
|
|
|
|
|
|
class EquivalentNumField(QgisAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
OUTPUT = 'OUTPUT'
|
|
FIELD = 'FIELD'
|
|
|
|
def group(self):
|
|
return self.tr('Vector table tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input layer')))
|
|
self.addParameter(ParameterTableField(self.FIELD,
|
|
self.tr('Class field'), self.INPUT))
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Layer with index field')))
|
|
|
|
def name(self):
|
|
return 'adduniquevalueindexfield'
|
|
|
|
def displayName(self):
|
|
return self.tr('Add unique value index field')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
fieldname = self.getParameterValue(self.FIELD)
|
|
output = self.getOutputFromName(self.OUTPUT)
|
|
vlayer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
|
|
fieldindex = vlayer.fields().lookupField(fieldname)
|
|
fields = vlayer.fields()
|
|
fields.append(QgsField('NUM_FIELD', QVariant.Int))
|
|
writer = output.getVectorWriter(fields, vlayer.wkbType(), vlayer.crs(), context)
|
|
outFeat = QgsFeature()
|
|
classes = {}
|
|
|
|
features = QgsProcessingUtils.getFeatures(vlayer, context)
|
|
total = 100.0 / vlayer.featureCount() if vlayer.featureCount() else 0
|
|
for current, feature in enumerate(features):
|
|
feedback.setProgress(int(current * total))
|
|
inGeom = feature.geometry()
|
|
outFeat.setGeometry(inGeom)
|
|
atMap = feature.attributes()
|
|
clazz = atMap[fieldindex]
|
|
|
|
if clazz not in classes:
|
|
classes[clazz] = len(list(classes.keys()))
|
|
|
|
atMap.append(classes[clazz])
|
|
outFeat.setAttributes(atMap)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
|
|
del writer
|