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BatchAlgorithmDialog.py
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BatchAlgorithmDialog.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
BatchAlgorithmDialog.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
from pprint import pformat
import time
from qgis.PyQt.QtWidgets import QPushButton, QDialogButtonBox
from qgis.PyQt.QtCore import Qt, QCoreApplication
from qgis.core import (QgsProcessingOutputHtml,
QgsProcessingOutputNumber,
QgsProcessingOutputString,
QgsProcessingOutputBoolean,
QgsProject,
QgsProcessingMultiStepFeedback,
QgsScopedProxyProgressTask,
QgsProcessingException)
from qgis.gui import QgsProcessingAlgorithmDialogBase
from qgis.utils import OverrideCursor, iface
from processing.gui.BatchPanel import BatchPanel
from processing.gui.AlgorithmExecutor import execute
from processing.gui.Postprocessing import handleAlgorithmResults
from processing.core.ProcessingResults import resultsList
from processing.tools.system import getTempFilename
from processing.tools import dataobjects
import codecs
class BatchFeedback(QgsProcessingMultiStepFeedback):
def __init__(self, steps, feedback):
super().__init__(steps, feedback)
self.errors = []
def reportError(self, error: str, fatalError: bool = False):
self.errors.append(error)
super().reportError(error, fatalError)
class BatchAlgorithmDialog(QgsProcessingAlgorithmDialogBase):
def __init__(self, alg, parent=None):
super().__init__(parent)
self.setAlgorithm(alg)
self.setWindowTitle(self.tr('Batch Processing - {0}').format(self.algorithm().displayName()))
self.setMainWidget(BatchPanel(self, self.algorithm()))
self.hideShortHelp()
self.btnRunSingle = QPushButton(QCoreApplication.translate('BatchAlgorithmDialog', "Run as Single Process…"))
self.btnRunSingle.clicked.connect(self.runAsSingle)
self.buttonBox().addButton(self.btnRunSingle, QDialogButtonBox.ResetRole) # reset role to ensure left alignment
self.updateRunButtonVisibility()
def runAsSingle(self):
self.close()
from processing.gui.AlgorithmDialog import AlgorithmDialog
dlg = AlgorithmDialog(self.algorithm().create(), parent=iface.mainWindow())
dlg.show()
dlg.exec_()
def resetAdditionalGui(self):
self.btnRunSingle.setEnabled(True)
def blockAdditionalControlsWhileRunning(self):
self.btnRunSingle.setEnabled(False)
def runAlgorithm(self):
alg_parameters = []
feedback = self.createFeedback()
load_layers = self.mainWidget().checkLoadLayersOnCompletion.isChecked()
project = QgsProject.instance() if load_layers else None
for row in range(self.mainWidget().batchRowCount()):
parameters, ok = self.mainWidget().parametersForRow(row, destinationProject=project, warnOnInvalid=True)
if ok:
alg_parameters.append(parameters)
if not alg_parameters:
return
task = QgsScopedProxyProgressTask(self.tr('Batch Processing - {0}').format(self.algorithm().displayName()))
multi_feedback = BatchFeedback(len(alg_parameters), feedback)
feedback.progressChanged.connect(task.setProgress)
algorithm_results = []
errors = []
with OverrideCursor(Qt.WaitCursor):
self.blockControlsWhileRunning()
self.setExecutedAnyResult(True)
self.cancelButton().setEnabled(True)
# Make sure the Log tab is visible before executing the algorithm
try:
self.showLog()
self.repaint()
except Exception: # FIXME which one?
pass
start_time = time.time()
for count, parameters in enumerate(alg_parameters):
if feedback.isCanceled():
break
self.setProgressText(
QCoreApplication.translate('BatchAlgorithmDialog', '\nProcessing algorithm {0}/{1}…').format(
count + 1, len(alg_parameters)))
self.setInfo(self.tr('<b>Algorithm {0} starting…</b>').format(self.algorithm().displayName()),
escapeHtml=False)
multi_feedback.setCurrentStep(count)
parameters = self.algorithm().preprocessParameters(parameters)
feedback.pushInfo(self.tr('Input parameters:'))
feedback.pushCommandInfo(pformat(parameters))
feedback.pushInfo('')
# important - we create a new context for each iteration
# this avoids holding onto resources and layers from earlier iterations,
# and allows batch processing of many more items then is possible
# if we hold on to these layers
context = dataobjects.createContext(feedback)
alg_start_time = time.time()
multi_feedback.errors = []
results, ok = self.algorithm().run(parameters, context, multi_feedback)
if ok:
self.setInfo(
QCoreApplication.translate('BatchAlgorithmDialog', 'Algorithm {0} correctly executed…').format(
self.algorithm().displayName()), escapeHtml=False)
feedback.pushInfo(
self.tr('Execution completed in {0:0.2f} seconds'.format(time.time() - alg_start_time)))
feedback.pushInfo(self.tr('Results:'))
feedback.pushCommandInfo(pformat(results))
feedback.pushInfo('')
algorithm_results.append({'parameters': parameters, 'results': results})
handleAlgorithmResults(self.algorithm(), context, multi_feedback, False, parameters)
else:
err = [e for e in multi_feedback.errors]
self.setInfo(
QCoreApplication.translate('BatchAlgorithmDialog', 'Algorithm {0} failed…').format(
self.algorithm().displayName()), escapeHtml=False)
feedback.reportError(
self.tr('Execution failed after {0:0.2f} seconds'.format(time.time() - alg_start_time)),
fatalError=False)
errors.append({'parameters': parameters, 'errors': err})
feedback.pushInfo(self.tr('Batch execution completed in {0:0.2f} seconds'.format(time.time() - start_time)))
if errors:
feedback.reportError(self.tr('{} executions failed. See log for further details.').format(len(errors)), fatalError=True)
task = None
self.finish(algorithm_results, errors)
self.cancelButton().setEnabled(False)
def finish(self, algorithm_results, errors):
for count, results in enumerate(algorithm_results):
self.loadHTMLResults(results['results'], count)
self.createSummaryTable(algorithm_results, errors)
self.resetGui()
def loadHTMLResults(self, results, num):
for out in self.algorithm().outputDefinitions():
if isinstance(out, QgsProcessingOutputHtml) and out.name() in results and results[out.name()]:
resultsList.addResult(icon=self.algorithm().icon(), name='{} [{}]'.format(out.description(), num),
result=results[out.name()])
def createSummaryTable(self, algorithm_results, errors):
createTable = False
for out in self.algorithm().outputDefinitions():
if isinstance(out, (QgsProcessingOutputNumber, QgsProcessingOutputString, QgsProcessingOutputBoolean)):
createTable = True
break
if not createTable and not errors:
return
outputFile = getTempFilename('html')
with codecs.open(outputFile, 'w', encoding='utf-8') as f:
if createTable:
for i, res in enumerate(algorithm_results):
results = res['results']
params = res['parameters']
if i > 0:
f.write('<hr>\n')
f.write(self.tr('<h3>Parameters</h3>\n'))
f.write('<table>\n')
for param in self.algorithm().parameterDefinitions():
if not param.isDestination():
if param.name() in params:
f.write('<tr><th>{}</th><td>{}</td></tr>\n'.format(param.description(),
params[param.name()]))
f.write('</table>\n')
f.write(self.tr('<h3>Results</h3>\n'))
f.write('<table>\n')
for out in self.algorithm().outputDefinitions():
if out.name() in results:
f.write('<tr><th>{}</th><td>{}</td></tr>\n'.format(out.description(), results[out.name()]))
f.write('</table>\n')
if errors:
f.write('<h2 style="color: red">{}</h2>\n'.format(self.tr('Errors')))
for i, res in enumerate(errors):
errors = res['errors']
params = res['parameters']
if i > 0:
f.write('<hr>\n')
f.write(self.tr('<h3>Parameters</h3>\n'))
f.write('<table>\n')
for param in self.algorithm().parameterDefinitions():
if not param.isDestination():
if param.name() in params:
f.write(
'<tr><th>{}</th><td>{}</td></tr>\n'.format(param.description(), params[param.name()]))
f.write('</table>\n')
f.write('<h3>{}</h3>\n'.format(self.tr('Error')))
f.write('<p style="color: red">{}</p>\n'.format('<br>'.join(errors)))
resultsList.addResult(icon=self.algorithm().icon(),
name='{} [summary]'.format(self.algorithm().name()), timestamp=time.localtime(),
result=outputFile)