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375 lines
17 KiB
Python
375 lines
17 KiB
Python
"""
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***************************************************************************
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AlgorithmDialog.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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import datetime
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import time
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from qgis.PyQt.QtCore import QCoreApplication
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from qgis.PyQt.QtWidgets import QMessageBox, QPushButton, QDialogButtonBox
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from qgis.PyQt.QtGui import QColor, QPalette
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from qgis.core import (Qgis,
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QgsApplication,
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QgsProcessingAlgRunnerTask,
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QgsProcessingOutputHtml,
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QgsProcessingAlgorithm,
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QgsProxyProgressTask,
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QgsProcessingFeatureSourceDefinition)
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from qgis.gui import (QgsGui,
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QgsProcessingAlgorithmDialogBase,
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QgsProcessingParametersGenerator,
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QgsProcessingContextGenerator)
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from qgis.utils import iface
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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.ParametersPanel import ParametersPanel
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from processing.gui.BatchAlgorithmDialog import BatchAlgorithmDialog
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from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
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from processing.gui.AlgorithmExecutor import executeIterating, execute, execute_in_place
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from processing.gui.Postprocessing import handleAlgorithmResults
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from processing.tools import dataobjects
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class AlgorithmDialog(QgsProcessingAlgorithmDialogBase):
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def __init__(self, alg, in_place=False, parent=None):
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super().__init__(parent)
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self.feedback_dialog = None
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self.in_place = in_place
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self.active_layer = iface.activeLayer() if self.in_place else None
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self.context = None
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self.feedback = None
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self.history_log_id = None
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self.history_details = {}
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self.setAlgorithm(alg)
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self.setMainWidget(self.getParametersPanel(alg, self))
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if not self.in_place:
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self.runAsBatchButton = QPushButton(QCoreApplication.translate("AlgorithmDialog", "Run as Batch Process…"))
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self.runAsBatchButton.clicked.connect(self.runAsBatch)
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self.buttonBox().addButton(self.runAsBatchButton,
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QDialogButtonBox.ButtonRole.ResetRole) # reset role to ensure left alignment
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else:
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in_place_input_parameter_name = 'INPUT'
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if hasattr(alg, 'inputParameterName'):
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in_place_input_parameter_name = alg.inputParameterName()
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self.mainWidget().setParameters({in_place_input_parameter_name: self.active_layer})
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self.runAsBatchButton = None
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has_selection = self.active_layer and (self.active_layer.selectedFeatureCount() > 0)
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self.buttonBox().button(QDialogButtonBox.StandardButton.Ok).setText(
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QCoreApplication.translate("AlgorithmDialog", "Modify Selected Features")
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if has_selection else QCoreApplication.translate("AlgorithmDialog", "Modify All Features"))
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self.setWindowTitle(self.windowTitle() + ' | ' + self.active_layer.name())
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self.updateRunButtonVisibility()
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def getParametersPanel(self, alg, parent):
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panel = ParametersPanel(parent, alg, self.in_place, self.active_layer)
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return panel
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def runAsBatch(self):
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self.close()
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dlg = BatchAlgorithmDialog(self.algorithm().create(), parent=iface.mainWindow())
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dlg.show()
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dlg.exec()
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def resetAdditionalGui(self):
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if not self.in_place:
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self.runAsBatchButton.setEnabled(True)
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def blockAdditionalControlsWhileRunning(self):
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if not self.in_place:
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self.runAsBatchButton.setEnabled(False)
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def setParameters(self, parameters):
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self.mainWidget().setParameters(parameters)
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def flag_invalid_parameter_value(self, message: str, widget):
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"""
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Highlights a parameter with an invalid value
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"""
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try:
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self.buttonBox().accepted.connect(lambda w=widget:
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w.setPalette(QPalette()))
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palette = widget.palette()
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palette.setColor(QPalette.ColorRole.Base, QColor(255, 255, 0))
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widget.setPalette(palette)
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except:
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pass
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self.messageBar().clearWidgets()
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self.messageBar().pushMessage("", self.tr("Wrong or missing parameter value: {0}").format(
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message),
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level=Qgis.MessageLevel.Warning, duration=5)
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def flag_invalid_output_extension(self, message: str, widget):
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"""
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Highlights a parameter with an invalid output extension
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"""
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try:
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self.buttonBox().accepted.connect(lambda w=widget:
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w.setPalette(QPalette()))
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palette = widget.palette()
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palette.setColor(QPalette.ColorRole.Base, QColor(255, 255, 0))
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widget.setPalette(palette)
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except:
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pass
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self.messageBar().clearWidgets()
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self.messageBar().pushMessage("", message,
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level=Qgis.MessageLevel.Warning, duration=5)
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def createProcessingParameters(self, flags=QgsProcessingParametersGenerator.Flags()):
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if self.mainWidget() is None:
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return {}
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try:
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return self.mainWidget().createProcessingParameters(flags)
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except AlgorithmDialogBase.InvalidParameterValue as e:
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self.flag_invalid_parameter_value(e.parameter.description(), e.widget)
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except AlgorithmDialogBase.InvalidOutputExtension as e:
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self.flag_invalid_output_extension(e.message, e.widget)
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return {}
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def processingContext(self):
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if self.context is None:
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self.feedback = self.createFeedback()
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self.context = dataobjects.createContext(self.feedback)
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self.applyContextOverrides(self.context)
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return self.context
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def runAlgorithm(self):
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self.feedback = self.createFeedback()
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self.context = dataobjects.createContext(self.feedback)
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self.applyContextOverrides(self.context)
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checkCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_CRS)
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try:
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# messy as all heck, but we don't want to call the dialog's implementation of
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# createProcessingParameters as we want to catch the exceptions raised by the
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# parameter panel instead...
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parameters = {} if self.mainWidget() is None else self.mainWidget().createProcessingParameters()
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if checkCRS and not self.algorithm().validateInputCrs(parameters, self.context):
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reply = QMessageBox.question(self, self.tr("Unmatching CRS's"),
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self.tr('Parameters do not all use the same CRS. This can '
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'cause unexpected results.\nDo you want to '
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'continue?'),
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QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
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QMessageBox.StandardButton.No)
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if reply == QMessageBox.StandardButton.No:
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return
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ok, msg = self.algorithm().checkParameterValues(parameters, self.context)
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if not ok:
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QMessageBox.warning(
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self, self.tr('Unable to execute algorithm'), msg)
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return
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self.blockControlsWhileRunning()
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self.setExecutedAnyResult(True)
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self.cancelButton().setEnabled(False)
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self.iterateParam = None
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for param in self.algorithm().parameterDefinitions():
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if isinstance(parameters.get(param.name(), None), QgsProcessingFeatureSourceDefinition) and parameters[
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param.name()].flags & QgsProcessingFeatureSourceDefinition.Flag.FlagCreateIndividualOutputPerInputFeature:
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self.iterateParam = param.name()
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break
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self.clearProgress()
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self.feedback.pushVersionInfo(self.algorithm().provider())
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if self.algorithm().provider() and self.algorithm().provider().warningMessage():
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self.feedback.reportError(self.algorithm().provider().warningMessage())
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self.feedback.pushInfo(
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QCoreApplication.translate('AlgorithmDialog', 'Algorithm started at: {}').format(
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datetime.datetime.now().replace(microsecond=0).isoformat()
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)
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)
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self.setInfo(
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QCoreApplication.translate('AlgorithmDialog', '<b>Algorithm \'{0}\' starting…</b>').format(
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self.algorithm().displayName()), escapeHtml=False)
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self.feedback.pushInfo(self.tr('Input parameters:'))
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display_params = []
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for k, v in parameters.items():
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display_params.append(
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"'" + k + "' : " + self.algorithm().parameterDefinition(k).valueAsPythonString(v, self.context))
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self.feedback.pushCommandInfo('{ ' + ', '.join(display_params) + ' }')
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self.feedback.pushInfo('')
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start_time = time.time()
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def elapsed_time(start_time, result):
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delta_t = time.time() - start_time
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hours = int(delta_t / 3600)
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minutes = int((delta_t % 3600) / 60)
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seconds = delta_t - hours * 3600 - minutes * 60
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str_hours = [self.tr("hour"), self.tr("hours")][hours > 1]
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str_minutes = [self.tr("minute"), self.tr("minutes")][minutes > 1]
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str_seconds = [self.tr("second"), self.tr("seconds")][seconds != 1]
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if hours > 0:
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elapsed = '{0} {1:0.2f} {2} ({3} {4} {5} {6} {7:0.0f} {2})'.format(
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result, delta_t, str_seconds, hours, str_hours, minutes, str_minutes, seconds)
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elif minutes > 0:
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elapsed = '{0} {1:0.2f} {2} ({3} {4} {5:0.0f} {2})'.format(
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result, delta_t, str_seconds, minutes, str_minutes, seconds)
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else:
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elapsed = '{} {:0.2f} {}'.format(
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result, delta_t, str_seconds)
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return elapsed
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if self.iterateParam:
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# Make sure the Log tab is visible before executing the algorithm
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try:
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self.showLog()
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self.repaint()
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except:
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pass
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self.cancelButton().setEnabled(self.algorithm().flags() & QgsProcessingAlgorithm.Flag.FlagCanCancel)
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if executeIterating(self.algorithm(), parameters, self.iterateParam, self.context, self.feedback):
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self.feedback.pushInfo(
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self.tr(elapsed_time(start_time, 'Execution completed in')))
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self.cancelButton().setEnabled(False)
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self.finish(True, parameters, self.context, self.feedback)
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else:
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self.cancelButton().setEnabled(False)
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self.resetGui()
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else:
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self.history_details = {
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'python_command': self.algorithm().asPythonCommand(parameters, self.context),
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'algorithm_id': self.algorithm().id(),
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'parameters': self.algorithm().asMap(parameters, self.context)
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}
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process_command, command_ok = self.algorithm().asQgisProcessCommand(parameters, self.context)
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if command_ok:
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self.history_details['process_command'] = process_command
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self.history_log_id, _ = QgsGui.historyProviderRegistry().addEntry('processing', self.history_details)
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QgsGui.instance().processingRecentAlgorithmLog().push(self.algorithm().id())
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self.cancelButton().setEnabled(self.algorithm().flags() & QgsProcessingAlgorithm.Flag.FlagCanCancel)
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def on_complete(ok, results):
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if ok:
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self.feedback.pushInfo(
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self.tr(elapsed_time(start_time, 'Execution completed in')))
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self.feedback.pushFormattedResults(self.algorithm(), self.context, results)
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else:
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self.feedback.reportError(
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self.tr(elapsed_time(start_time, 'Execution failed after')))
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self.feedback.pushInfo('')
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if self.history_log_id is not None:
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# can't deepcopy this!
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self.history_details['results'] = {k: v for k, v in results.items() if k != 'CHILD_INPUTS'}
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self.history_details['log'] = self.feedback.htmlLog()
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QgsGui.historyProviderRegistry().updateEntry(self.history_log_id, self.history_details)
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if self.feedback_dialog is not None:
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self.feedback_dialog.close()
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self.feedback_dialog.deleteLater()
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self.feedback_dialog = None
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self.cancelButton().setEnabled(False)
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self.finish(ok, results, self.context, self.feedback, in_place=self.in_place)
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self.feedback = None
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self.context = None
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if not self.in_place and not (self.algorithm().flags() & QgsProcessingAlgorithm.Flag.FlagNoThreading):
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# Make sure the Log tab is visible before executing the algorithm
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self.showLog()
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task = QgsProcessingAlgRunnerTask(self.algorithm(), parameters, self.context, self.feedback)
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if task.isCanceled():
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on_complete(False, {})
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else:
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task.executed.connect(on_complete)
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self.setCurrentTask(task)
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else:
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self.proxy_progress = QgsProxyProgressTask(
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QCoreApplication.translate("AlgorithmDialog", "Executing “{}”").format(
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self.algorithm().displayName()))
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QgsApplication.taskManager().addTask(self.proxy_progress)
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self.feedback.progressChanged.connect(self.proxy_progress.setProxyProgress)
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self.feedback_dialog = self.createProgressDialog()
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self.feedback_dialog.show()
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if self.in_place:
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ok, results = execute_in_place(self.algorithm(), parameters, self.context, self.feedback)
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else:
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ok, results = execute(self.algorithm(), parameters, self.context, self.feedback)
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self.feedback.progressChanged.disconnect()
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self.proxy_progress.finalize(ok)
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on_complete(ok, results)
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except AlgorithmDialogBase.InvalidParameterValue as e:
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self.flag_invalid_parameter_value(e.parameter.description(), e.widget)
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except AlgorithmDialogBase.InvalidOutputExtension as e:
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self.flag_invalid_output_extension(e.message, e.widget)
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def finish(self, successful, result, context, feedback, in_place=False):
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keepOpen = not successful or ProcessingConfig.getSetting(ProcessingConfig.KEEP_DIALOG_OPEN)
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generated_html_outputs = False
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if not in_place and self.iterateParam is None:
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# add html results to results dock
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for out in self.algorithm().outputDefinitions():
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if isinstance(out, QgsProcessingOutputHtml) and out.name() in result and result[out.name()]:
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resultsList.addResult(icon=self.algorithm().icon(), name=out.description(),
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timestamp=time.localtime(),
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result=result[out.name()])
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generated_html_outputs = True
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if not handleAlgorithmResults(
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self.algorithm(),
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context,
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feedback,
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result):
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self.resetGui()
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return
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self.setExecuted(True)
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self.setResults(result)
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self.setInfo(self.tr('Algorithm \'{0}\' finished').format(self.algorithm().displayName()), escapeHtml=False)
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self.algorithmFinished.emit(successful, result)
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if not in_place and not keepOpen:
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self.close()
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else:
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self.resetGui()
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if generated_html_outputs:
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self.setInfo(
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self.tr('HTML output has been generated by this algorithm.'
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'\nOpen the results dialog to check it.'), escapeHtml=False)
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