mirror of
https://github.com/qgis/QGIS.git
synced 2025-11-04 00:04:25 -05:00
82 lines
2.9 KiB
Python
82 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
TextToFloat.py
|
|
---------------------
|
|
Date : May 2010
|
|
Copyright : (C) 2010 by Michael Minn
|
|
Email : pyqgis at michaelminn 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__ = 'Michael Minn'
|
|
__date__ = 'May 2010'
|
|
__copyright__ = '(C) 2010, Michael Minn'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from PyQt4.QtCore import QVariant
|
|
from qgis.core import QgsField
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.parameters import ParameterTableField
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
|
|
class TextToFloat(GeoAlgorithm):
|
|
INPUT = 'INPUT'
|
|
FIELD = 'FIELD'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = 'Text to float'
|
|
self.group = 'Vector table tools'
|
|
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input Layer'), [ParameterVector.VECTOR_TYPE_ANY]))
|
|
self.addParameter(ParameterTableField(self.FIELD,
|
|
self.tr('Text attribute to convert to float'),
|
|
self.INPUT, ParameterTableField.DATA_TYPE_STRING))
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Float from text')))
|
|
|
|
def processAlgorithm(self, progress):
|
|
layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
|
|
fieldName = self.getParameterValue(self.FIELD)
|
|
idx = layer.fieldNameIndex(fieldName)
|
|
|
|
fields = layer.pendingFields()
|
|
fields[idx] = QgsField(fieldName, QVariant.Double, '', 24, 15)
|
|
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
|
|
layer.wkbType(), layer.crs())
|
|
|
|
features = vector.features(layer)
|
|
|
|
count = len(features)
|
|
total = 100.0 / float(count)
|
|
for count, f in enumerate(features):
|
|
value = f[idx]
|
|
try:
|
|
if '%' in value:
|
|
f[idx] = float(value.replace('%', '')) / 100.0
|
|
else:
|
|
f[idx] = float(value)
|
|
except:
|
|
f[idx] = None
|
|
|
|
writer.addFeature(f)
|
|
progress.setPercentage(int(count * total))
|
|
|
|
del writer
|