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- """
- ***************************************************************************
- r_drain.py
- ----------
- Date : February 2016
- Copyright : (C) 2016 by Médéric Ribreux
- Email : medspx at medspx dot fr
- ***************************************************************************
- * *
- * 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__ = 'Médéric Ribreux'
- __date__ = 'February 2016'
- __copyright__ = '(C) 2016, Médéric Ribreux'
- def checkParameterValuesBeforeExecuting(alg, parameters, context):
- """ Verify if we have the right parameters """
- # start_coordinates and start_points are mutually exclusives
- if (alg.parameterAsString(parameters, 'start_coordinates', context)
- and alg.parameterAsVectorLayer(parameters, 'start_points', context)):
- return False, alg.tr("You need to set either start coordinates OR a start points vector layer!")
- # You need to set at least one parameter
- if (not alg.parameterAsString(parameters, 'start_coordinates', context)
- and not alg.parameterAsVectorLayer(parameters, 'start_points', context)):
- return False, alg.tr("You need to set either start coordinates OR a start points vector layer!")
- paramscore = [f for f in ['-c', '-a', '-n']
- if alg.parameterAsBoolean(parameters, f, context)]
- if len(paramscore) > 1:
- return False, alg.tr("-c, -a, -n parameters are mutually exclusive!")
- return True, None
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