2012-08-04 19:48:25 +02:00
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import os.path
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2012-09-28 14:39:13 +03:00
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import codecs
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2012-08-04 19:48:25 +02:00
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from PyQt4 import QtGui
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from sextante.core.GeoAlgorithm import GeoAlgorithm
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from sextante.core.QGisLayers import QGisLayers
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from sextante.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
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from sextante.parameters.ParameterVector import ParameterVector
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from sextante.parameters.ParameterTableField import ParameterTableField
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from sextante.outputs.OutputHTML import OutputHTML
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from sextante.outputs.OutputNumber import OutputNumber
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class UniqueValues(GeoAlgorithm):
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INPUT_LAYER = "INPUT_LAYER"
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FIELD_NAME = "FIELD_NAME"
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TOTAL_VALUES = "TOTAL_VALUES"
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OUTPUT = "OUTPUT"
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def getIcon(self):
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return QtGui.QIcon(os.path.dirname(__file__) + "/icons/unique.png")
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def defineCharacteristics(self):
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self.name = "List unique values"
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self.group = "Analysis tools"
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2012-09-28 14:39:13 +03:00
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self.addParameter(ParameterVector(self.INPUT_LAYER, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
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self.addParameter(ParameterTableField(self.FIELD_NAME, "Targer field", self.INPUT_LAYER, ParameterTableField.DATA_TYPE_ANY))
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self.addOutput(OutputHTML(self.OUTPUT, "Unique values"))
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self.addOutput(OutputNumber(self.TOTAL_VALUES, "Total unique values"))
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2012-08-04 19:48:25 +02:00
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def processAlgorithm(self, progress):
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2012-09-28 14:39:13 +03:00
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layer = QGisLayers.getObjectFromUri(self.getParameterValue(self.INPUT_LAYER))
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fieldName = self.getParameterValue(self.FIELD_NAME)
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2012-08-04 19:48:25 +02:00
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2012-09-28 14:39:13 +03:00
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outputFile = self.getOutputValue(self.OUTPUT)
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2012-08-04 19:48:25 +02:00
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values = layer.uniqueValues(layer.fieldNameIndex(fieldName))
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self.createHTML(outputFile, values)
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2012-09-28 14:39:13 +03:00
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self.setOutputValue(self.TOTAL_VALUES, len(values))
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2012-08-04 19:48:25 +02:00
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def createHTML(self, outputFile, algData):
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2012-09-28 14:39:13 +03:00
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f = codecs.open(outputFile, "w", encoding="utf-8")
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f.write('<html><head>')
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f.write('<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body>')
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2012-08-04 19:48:25 +02:00
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f.write("<p>Total unique values: " + str(len(algData)) + "</p>")
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f.write("<p>Unique values:</p>")
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f.write("<ul>")
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for s in algData:
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f.write("<li>" + unicode(s.toString()) + "</li>")
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2012-09-28 14:39:13 +03:00
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f.write("</ul></body></html>")
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2012-08-04 19:48:25 +02:00
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f.close()
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