# -*- coding: utf-8 -*-
"""
***************************************************************************
UniqueValues.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__ = '$Format:%H$'
import codecs
from sextante.core.GeoAlgorithm import GeoAlgorithm
from sextante.core.QGisLayers import QGisLayers
from sextante.parameters.ParameterVector import ParameterVector
from sextante.parameters.ParameterTableField import ParameterTableField
from sextante.outputs.OutputHTML import OutputHTML
from sextante.outputs.OutputNumber import OutputNumber
class UniqueValues(GeoAlgorithm):
INPUT_LAYER = "INPUT_LAYER"
FIELD_NAME = "FIELD_NAME"
TOTAL_VALUES = "TOTAL_VALUES"
OUTPUT = "OUTPUT"
#===========================================================================
# def getIcon(self):
# return QtGui.QIcon(os.path.dirname(__file__) + "/icons/unique.png")
#===========================================================================
def defineCharacteristics(self):
self.name = "List unique values"
self.group = "Vector table tools"
self.addParameter(ParameterVector(self.INPUT_LAYER, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
self.addParameter(ParameterTableField(self.FIELD_NAME, "Targer field", self.INPUT_LAYER, ParameterTableField.DATA_TYPE_ANY))
self.addOutput(OutputHTML(self.OUTPUT, "Unique values"))
self.addOutput(OutputNumber(self.TOTAL_VALUES, "Total unique values"))
def processAlgorithm(self, progress):
layer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT_LAYER))
fieldName = self.getParameterValue(self.FIELD_NAME)
outputFile = self.getOutputValue(self.OUTPUT)
values = layer.uniqueValues(layer.fieldNameIndex(fieldName))
self.createHTML(outputFile, values)
self.setOutputValue(self.TOTAL_VALUES, len(values))
def createHTML(self, outputFile, algData):
f = codecs.open(outputFile, "w", encoding="utf-8")
f.write('')
f.write('')
f.write("Total unique values: " + str(len(algData)) + "
")
f.write("Unique values:
")
f.write("")
for s in algData:
f.write("- " + unicode(s.toString()) + "
")
f.write("
")
f.close()