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70 lines
2.8 KiB
Python
70 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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CalculatorModelerAlgorithm.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.GeoAlgorithmExecutionException import \
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GeoAlgorithmExecutionException
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from processing.modeler.CalculatorModelerParametersDialog import \
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CalculatorModelerParametersDialog
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from processing.parameters.ParameterString import ParameterString
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from processing.parameters.ParameterNumber import ParameterNumber
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from processing.outputs.OutputNumber import OutputNumber
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class CalculatorModelerAlgorithm(GeoAlgorithm):
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FORMULA = 'FORMULA'
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NUMBER = 'NUMBER'
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RESULT = 'RESULT'
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AVAILABLE_VARIABLES = 10
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def defineCharacteristics(self):
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self.showInModeler = True
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self.showInToolbox = False
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self.name = 'Calculator'
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self.group = 'Modeler-only tools'
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self.addParameter(ParameterString(self.FORMULA, 'Formula', ''))
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for i in range(self.AVAILABLE_VARIABLES):
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self.addParameter(ParameterNumber(CalculatorModelerAlgorithm.NUMBER
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+ str(i), 'dummy'))
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self.addOutput(OutputNumber(self.RESULT, 'Result'))
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def processAlgorithm(self, progress):
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formula = self.getParameterValue(self.FORMULA)
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for i in range(self.AVAILABLE_VARIABLES):
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name = CalculatorModelerAlgorithm.NUMBER + str(i)
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num = self.getParameterValue(name)
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formula = formula.replace(chr(97 + i), str(num))
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try:
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result = eval(formula)
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self.setOutputValue(self.RESULT, result)
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except:
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raise GeoAlgorithmExecutionException('Wrong formula: ' + formula)
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def getCustomModelerParametersDialog(self, modelAlg, algIndex=None):
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return CalculatorModelerParametersDialog(self, modelAlg, algIndex)
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