# -*- 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. *
* *
***************************************************************************
"""
from sextante.outputs.OutputString import OutputString
__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
from sextante.algs.ftools import FToolsUtils as utils
class UniqueValues(GeoAlgorithm):
INPUT_LAYER = "INPUT_LAYER"
FIELD_NAME = "FIELD_NAME"
TOTAL_VALUES = "TOTAL_VALUES"
UNIQUE_VALUES = "UNIQUE_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, "Target field", self.INPUT_LAYER, ParameterTableField.DATA_TYPE_ANY))
self.addOutput(OutputHTML(self.OUTPUT, "Unique values"))
self.addOutput(OutputNumber(self.TOTAL_VALUES, "Total unique values"))
self.addOutput(OutputString(self.UNIQUE_VALUES, "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 = utils.getUniqueValues(layer, layer.fieldNameIndex(fieldName))
self.createHTML(outputFile, values)
self.setOutputValue(self.TOTAL_VALUES, len(values))
self.setOutputValue(self.UNIQUE_VALUES, ";".join([unicode(v.toString()) for v in 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()