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80 lines
3.3 KiB
Python
80 lines
3.3 KiB
Python
"""
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***************************************************************************
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r_category.py
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-------------
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Date : February 2016
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Copyright : (C) 2016 by Médéric Ribreux
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Email : medspx at medspx dot fr
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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__ = "Médéric Ribreux"
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__date__ = "February 2016"
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__copyright__ = "(C) 2016, Médéric Ribreux"
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from processing.tools.system import getTempFilename
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from grassprovider.grass_utils import GrassUtils
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def checkParameterValuesBeforeExecuting(alg, parameters, context):
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"""Verify if we have the right parameters"""
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rules = alg.parameterAsString(parameters, "rules", context)
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txtrules = alg.parameterAsString(parameters, "txtrules", context)
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raster = alg.parameterAsString(parameters, "raster", context)
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if rules and txtrules:
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return False, alg.tr(
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"You need to set either a rules file or write directly the rules!"
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)
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elif (rules and raster) or (txtrules and raster):
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return False, alg.tr(
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"You need to set either rules or a raster from which to copy categories!"
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)
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return True, None
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def processInputs(alg, parameters, context, feedback):
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# If there is another raster to copy categories from
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# we need to import it with r.in.gdal rather than r.external
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raster = alg.parameterAsString(parameters, "raster", context)
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if raster:
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alg.loadRasterLayerFromParameter("raster", parameters, context, False, None)
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alg.loadRasterLayerFromParameter("map", parameters, context)
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alg.postInputs(context)
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def processCommand(alg, parameters, context, feedback):
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# Handle inline rules
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txtRules = alg.parameterAsString(parameters, "txtrules", context)
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if txtRules:
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# Creates a temporary txt file
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tempRulesName = getTempFilename(context=context)
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# Inject rules into temporary txt file
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with open(tempRulesName, "w") as tempRules:
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tempRules.write(txtRules)
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alg.removeParameter("txtrules")
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parameters["rules"] = tempRulesName
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alg.processCommand(parameters, context, feedback, True)
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def processOutputs(alg, parameters, context, feedback):
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# Output results ('map' layer)
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createOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_OPT, context)
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metaOpt = alg.parameterAsString(parameters, alg.GRASS_RASTER_FORMAT_META, context)
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# We need to export the raster with all its bands and its color table
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fileName = alg.parameterAsOutputLayer(parameters, "output", context)
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outFormat = GrassUtils.getRasterFormatFromFilename(fileName)
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grassName = alg.exportedLayers["map"]
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alg.exportRasterLayer(grassName, fileName, True, outFormat, createOpt, metaOpt)
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