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106 lines
3.8 KiB
Python
106 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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AlgorithmProvider.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 qgis.PyQt.QtCore import QCoreApplication
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from qgis.core import QgsProcessingProvider
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from processing.core.ProcessingConfig import Setting, ProcessingConfig
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from processing.tools import dataobjects
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class AlgorithmProvider(QgsProcessingProvider):
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"""This is the base class for algorithms providers.
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An algorithm provider is a set of related algorithms, typically
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from the same external application or related to a common area
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of analysis.
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"""
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def __init__(self):
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super().__init__()
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# Indicates if the provider should be active by default.
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# For provider relying on an external software, this should be
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# False, so the user should activate them manually and install
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# the required software in advance.
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self.activate = True
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self.actions = []
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self.contextMenuActions = []
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def loadAlgorithms(self):
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self.algs = []
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self._loadAlgorithms()
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for alg in self.algs:
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alg.provider = self
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# Methods to be overridden.
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def _loadAlgorithms(self):
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"""Algorithm loading should take place here, filling self.algs,
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which is a list of elements of class GeoAlgorithm. Use that
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class to create your own algorithms.
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"""
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pass
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def initializeSettings(self):
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"""This is the place where you should add config parameters
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using the ProcessingConfig class.
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This method is called when a provider is added to the
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Processing framework. By default it just adds a setting to
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activate or deactivate algorithms from the provider.
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"""
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ProcessingConfig.settingIcons[self.name()] = self.icon()
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name = 'ACTIVATE_' + self.id().upper().replace(' ', '_')
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ProcessingConfig.addSetting(Setting(self.name(), name,
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self.tr('Activate'), self.activate))
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def unload(self):
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"""Do here anything that you want to be done when the provider
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is removed from the list of available ones.
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This method is called when you remove the provider from
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Processing. Removal of config setting should be done here.
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"""
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name = 'ACTIVATE_' + self.id().upper().replace(' ', '_')
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ProcessingConfig.removeSetting(name)
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def getSupportedOutputRasterLayerExtensions(self):
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return ['tif']
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def getSupportedOutputVectorLayerExtensions(self):
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return dataobjects.getSupportedOutputVectorLayerExtensions()
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def getSupportedOutputTableExtensions(self):
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return ['csv']
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def supportsNonFileBasedOutput(self):
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return False
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def tr(self, string, context=''):
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if context == '':
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context = self.__class__.__name__
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return QCoreApplication.translate(context, string)
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