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"""
***************************************************************************
v_distance.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"
from qgis.core import QgsProcessingParameterDefinition
from qgis.PyQt.QtCore import QCoreApplication
def checkParameterValuesBeforeExecuting(alg, parameters, context):
"""Verify if we have the right parameters"""
# Verifiy that we have the good number of columns
uploads = alg.parameterAsEnums(parameters, "upload", context)
columns = alg.parameterAsFields(parameters, "column", context)
if len(columns) != len(uploads):
return False, QCoreApplication.translate(
"GrassAlgorithmExt",
"The number of columns and the number of upload parameters should be equal!",
)
return True, None
def processCommand(alg, parameters, context, feedback):
# We need to disable only from_output parameter
fromOutput = alg.parameterDefinition("from_output")
fromOutput.setFlags(
fromOutput.flags() | QgsProcessingParameterDefinition.Flag.FlagHidden
)
alg.processCommand(parameters, context, feedback, False)
fromOutput.setFlags(
fromOutput.flags() | QgsProcessingParameterDefinition.Flag.FlagHidden
)
def processOutputs(alg, parameters, context, feedback):
alg.vectorOutputType(parameters, context)
alg.exportVectorLayerFromParameter("output", parameters, context)
# for from_output, we export the initial layer
fileName = alg.parameterAsOutputLayer(parameters, "from_output", context)
grassName = alg.exportedLayers["from"]
alg.exportVectorLayer(grassName, fileName)
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