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112 lines
4.3 KiB
Python
112 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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general.py
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---------------------
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Date : April 2013
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Copyright : (C) 2013 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__ = 'April 2013'
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__copyright__ = '(C) 2013, 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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import os
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try:
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import configparser
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except ImportError:
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import configparser as configparser
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from qgis.core import (QgsApplication,
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QgsProcessingAlgorithm,
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QgsProcessingParameterEnum,
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QgsProcessingParameterFeatureSink,
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QgsProcessingParameterVectorDestination,
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QgsProcessingParameterRasterDestination,
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QgsProcessingOutputLayerDefinition,
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QgsProject)
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from processing.core.Processing import Processing
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from processing.core.parameters import ParameterSelection
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from processing.gui.Postprocessing import handleAlgorithmResults
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def algorithmHelp(id):
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"""Prints algorithm parameters with their types. Also
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provides information about options if any.
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"""
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alg = QgsApplication.processingRegistry().algorithmById(id)
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if alg is not None:
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print('{} ({})\n'.format(alg.displayName(), alg.id()))
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print(alg.shortHelpString())
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print('\n----------------')
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print('Input parameters')
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print('----------------')
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for p in alg.parameterDefinitions():
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print('\n{}: <{}>'.format(p.name(), p.__class__.__name__))
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if p.description():
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print('\t' + p.description())
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if isinstance(p, QgsProcessingParameterEnum):
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opts = []
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for i, o in enumerate(p.options()):
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opts.append('\t\t{} - {}'.format(i, o))
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print('\n'.join(opts))
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print('\n----------------')
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print('Outputs')
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print('----------------')
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for o in alg.outputDefinitions():
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print('\n{}: <{}>'.format(o.name(), o.__class__.__name__))
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if o.description():
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print('\t' + o.description())
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else:
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print('Algorithm "{}" not found.'.format(id))
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def run(algOrName, parameters, onFinish=None, feedback=None, context=None):
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"""Executes given algorithm and returns its outputs as dictionary
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object.
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"""
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return Processing.runAlgorithm(algOrName, parameters, onFinish, feedback, context)
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def runAndLoadResults(algOrName, parameters, feedback=None, context=None):
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"""Executes given algorithm and load its results into QGIS project
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when possible.
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"""
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if isinstance(algOrName, QgsProcessingAlgorithm):
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alg = algOrName
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else:
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alg = QgsApplication.processingRegistry().createAlgorithmById(algOrName)
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# output destination parameters to point to current project
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for param in alg.parameterDefinitions():
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if not param.name() in parameters:
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continue
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if isinstance(param, (QgsProcessingParameterFeatureSink, QgsProcessingParameterVectorDestination, QgsProcessingParameterRasterDestination)):
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p = parameters[param.name()]
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if not isinstance(p, QgsProcessingOutputLayerDefinition):
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parameters[param.name()] = QgsProcessingOutputLayerDefinition(p, QgsProject.instance())
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else:
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p.destinationProject = QgsProject.instance()
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parameters[param.name()] = p
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return Processing.runAlgorithm(alg, parameters=parameters, onFinish=handleAlgorithmResults, feedback=feedback, context=context)
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