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54 lines
2.1 KiB
Python
54 lines
2.1 KiB
Python
import os.path
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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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from sextante.ftools import ftools_utils
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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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self.addParameter(ParameterVector(UniqueValues.INPUT_LAYER, "Input layer", ParameterVector.VECTOR_TYPE_ANY))
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self.addParameter(ParameterTableField(UniqueValues.FIELD_NAME, "Targer field", UniqueValues.INPUT_LAYER, ParameterTableField.DATA_TYPE_ANY))
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self.addOutput(OutputHTML(UniqueValues.OUTPUT, "Unique values"))
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self.addOutput(OutputNumber(UniqueValues.TOTAL_VALUES, "Total unique values"))
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def processAlgorithm(self, progress):
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layer = QGisLayers.getObjectFromUri(self.getParameterValue(UniqueValues.INPUT_LAYER))
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fieldName = self.getParameterValue(UniqueValues.FIELD_NAME)
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outputFile = self.getOutputValue(UniqueValues.OUTPUT)
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values = layer.uniqueValues(layer.fieldNameIndex(fieldName))
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self.createHTML(outputFile, values)
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self.setOutputValue(UniqueValues.TOTAL_VALUES, len(values))
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def createHTML(self, outputFile, algData):
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f = open(outputFile, "w")
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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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f.write("</ul>")
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f.close()
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