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fd2c18ee16
temporary output layers in the provided processing context Should fix loss of intermediate memory layers when running a multi-step model
93 lines
3.8 KiB
Python
93 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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Postprocessing.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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import os
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import traceback
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from qgis.PyQt.QtWidgets import QApplication
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from qgis.PyQt.QtCore import QCoreApplication
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from qgis.core import (QgsProject,
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QgsProcessingFeedback,
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QgsProcessingUtils,
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QgsMessageLog)
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from processing.core.ProcessingConfig import ProcessingConfig
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from processing.core.ProcessingResults import resultsList
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#from processing.gui.ResultsDock import ResultsDock
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from processing.gui.RenderingStyles import RenderingStyles
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from processing.core.outputs import OutputRaster
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from processing.core.outputs import OutputVector
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from processing.core.outputs import OutputTable
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from processing.core.outputs import OutputHTML
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from processing.tools import dataobjects
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def handleAlgorithmResults(alg, context, feedback=None, showResults=True):
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wrongLayers = []
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if feedback is None:
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feedback = QgsProcessingFeedback()
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feedback.setProgressText(QCoreApplication.translate('Postprocessing', 'Loading resulting layers'))
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i = 0
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for out in alg.outputs:
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feedback.setProgress(100 * i / float(len(alg.outputs)))
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if out.hidden or not out.open:
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continue
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if isinstance(out, (OutputRaster, OutputVector, OutputTable)):
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try:
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if hasattr(out, "layer") and out.layer is not None:
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out.layer.setName(out.description)
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QgsProject.instance().addMapLayer(context.temporaryLayerStore().takeMapLayer(out.layer))
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# temporary hack to work around mutable outputs
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out.layer = None
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else:
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if ProcessingConfig.getSetting(
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ProcessingConfig.USE_FILENAME_AS_LAYER_NAME):
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name = os.path.basename(out.value)
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else:
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name = out.description
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dataobjects.load(out.value, name, alg.crs,
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RenderingStyles.getStyle(alg.id(),
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out.name))
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except Exception:
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QgsMessageLog.logMessage("Error loading result layer:\n" + traceback.format_exc(), 'Processing', QgsMessageLog.CRITICAL)
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wrongLayers.append(out.description)
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elif isinstance(out, OutputHTML):
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resultsList.addResult(alg.icon(), out.description, out.value)
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i += 1
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QApplication.restoreOverrideCursor()
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if wrongLayers:
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msg = "The following layers were not correctly generated.<ul>"
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msg += "".join(["<li>%s</li>" % lay for lay in wrongLayers]) + "</ul>"
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msg += "You can check the log messages to find more information about the execution of the algorithm"
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feedback.reportError(msg)
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return len(wrongLayers) == 0
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