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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.
89 lines
3.3 KiB
Python
89 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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TextToFloat.py
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---------------------
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Date : May 2010
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Copyright : (C) 2010 by Michael Minn
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Email : pyqgis at michaelminn 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__ = 'Michael Minn'
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__date__ = 'May 2010'
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__copyright__ = '(C) 2010, Michael Minn'
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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 (QgsApplication,
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QgsField,
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QgsFeatureSink,
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QgsProcessingUtils)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterTableField
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from processing.core.outputs import OutputVector
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class TextToFloat(QgisAlgorithm):
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INPUT = 'INPUT'
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FIELD = 'FIELD'
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OUTPUT = 'OUTPUT'
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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.addParameter(ParameterVector(self.INPUT,
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self.tr('Input Layer')))
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self.addParameter(ParameterTableField(self.FIELD,
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self.tr('Text attribute to convert to float'),
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self.INPUT, ParameterTableField.DATA_TYPE_STRING))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Float from text')))
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def name(self):
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return 'texttofloat'
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def displayName(self):
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return self.tr('Text to float')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT), context)
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fieldName = self.getParameterValue(self.FIELD)
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idx = layer.fields().lookupField(fieldName)
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fields = layer.fields()
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fields[idx] = QgsField(fieldName, QVariant.Double, '', 24, 15)
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields, layer.wkbType(), layer.crs(), context)
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / layer.featureCount() if layer.featureCount() else 0
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for current, f in enumerate(features):
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value = f[idx]
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try:
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if '%' in value:
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f[idx] = float(value.replace('%', '')) / 100.0
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else:
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f[idx] = float(value)
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except:
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f[idx] = None
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writer.addFeature(f, QgsFeatureSink.FastInsert)
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feedback.setProgress(int(current * total))
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del writer
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