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AlgorithmDialog.py
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AlgorithmDialog.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
AlgorithmDialog.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. *
* *
***************************************************************************
"""
from builtins import range
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from pprint import pformat
import time
from qgis.PyQt.QtCore import Qt
from qgis.PyQt.QtWidgets import QMessageBox, QApplication, QPushButton, QWidget, QVBoxLayout, QSizePolicy
from qgis.PyQt.QtGui import QCursor, QColor, QPalette
from qgis.core import (QgsProject,
QgsProcessingUtils,
QgsMessageLog,
QgsProcessingParameterDefinition,
QgsProcessingOutputRasterLayer,
QgsProcessingOutputVectorLayer,
QgsProcessingOutputLayerDefinition,
QgsProcessingParameterFeatureSink,
QgsProcessingParameterRasterOutput,
QgsProcessingAlgorithm)
from qgis.gui import QgsMessageBar
from qgis.utils import iface
from processing.core.ProcessingLog import ProcessingLog
from processing.core.ProcessingConfig import ProcessingConfig
from processing.gui.ParametersPanel import ParametersPanel
from processing.gui.BatchAlgorithmDialog import BatchAlgorithmDialog
from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
from processing.gui.AlgorithmExecutor import execute, executeIterating
from processing.gui.Postprocessing import handleAlgorithmResults
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterExtent
from processing.core.parameters import ParameterMultipleInput
from processing.core.GeoAlgorithm import executeAlgorithm
from processing.core.outputs import OutputTable
from processing.tools import dataobjects
class AlgorithmDialog(AlgorithmDialogBase):
def __init__(self, alg):
AlgorithmDialogBase.__init__(self, alg)
self.alg = alg
self.setMainWidget(self.getParametersPanel(alg, self))
self.bar = QgsMessageBar()
self.bar.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Fixed)
self.layout().insertWidget(0, self.bar)
self.cornerWidget = QWidget()
layout = QVBoxLayout()
layout.setContentsMargins(0, 0, 0, 5)
self.tabWidget.setStyleSheet("QTabBar::tab { height: 30px; }")
self.runAsBatchButton = QPushButton(self.tr("Run as batch process..."))
self.runAsBatchButton.clicked.connect(self.runAsBatch)
layout.addWidget(self.runAsBatchButton)
self.cornerWidget.setLayout(layout)
self.tabWidget.setCornerWidget(self.cornerWidget)
def getParametersPanel(self, alg, parent):
return ParametersPanel(parent, alg)
def runAsBatch(self):
self.close()
dlg = BatchAlgorithmDialog(self.alg)
dlg.show()
dlg.exec_()
def getParamValues(self):
parameters = {}
for param in self.alg.parameterDefinitions():
if param.flags() & QgsProcessingParameterDefinition.FlagHidden:
continue
if not param.isDestination():
wrapper = self.mainWidget.wrappers[param.name()]
value = None
if wrapper.widget:
value = wrapper.value()
parameters[param.name()] = value
if not param.checkValueIsAcceptable(value):
raise AlgorithmDialogBase.InvalidParameterValue(param, wrapper.widget)
else:
dest_project = None
if not param.flags() & QgsProcessingParameterDefinition.FlagHidden and \
isinstance(param, (QgsProcessingParameterRasterOutput, QgsProcessingParameterFeatureSink, OutputTable)):
if self.mainWidget.checkBoxes[param.name()].isChecked():
dest_project = QgsProject.instance()
value = self.mainWidget.outputWidgets[param.name()].getValue()
if value and isinstance(value, QgsProcessingOutputLayerDefinition):
value.destinationProject = dest_project
if value:
parameters[param.name()] = value
return parameters
def checkExtentCRS(self):
unmatchingCRS = False
hasExtent = False
context = dataobjects.createContext()
projectCRS = iface.mapCanvas().mapSettings().destinationCrs()
layers = QgsProcessingUtils.compatibleLayers(QgsProject.instance())
for param in self.alg.parameterDefinitions():
if isinstance(param, (ParameterRaster, ParameterVector, ParameterMultipleInput)):
if param.value:
if isinstance(param, ParameterMultipleInput):
inputlayers = param.value.split(';')
else:
inputlayers = [param.value]
for inputlayer in inputlayers:
for layer in layers:
if layer.source() == inputlayer:
if layer.crs() != projectCRS:
unmatchingCRS = True
p = QgsProcessingUtils.mapLayerFromString(inputlayer, context)
if p is not None:
if p.crs() != projectCRS:
unmatchingCRS = True
if isinstance(param, ParameterExtent):
if param.skip_crs_check:
continue
value = self.mainWidget.wrappers[param.name()].widget.leText.text().strip()
if value:
hasExtent = True
return hasExtent and unmatchingCRS
def accept(self):
super(AlgorithmDialog, self)._saveGeometry()
feedback = self.createFeedback()
context = dataobjects.createContext(feedback)
checkCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_CRS)
try:
parameters = self.getParamValues()
if checkCRS and not self.alg.validateInputCrs(parameters, context):
reply = QMessageBox.question(self, self.tr("Unmatching CRS's"),
self.tr('Layers do not all use the same CRS. This can '
'cause unexpected results.\nDo you want to '
'continue?'),
QMessageBox.Yes | QMessageBox.No,
QMessageBox.No)
if reply == QMessageBox.No:
return
checkExtentCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_EXTENT_CRS)
#TODO
if False and checkExtentCRS and self.checkExtentCRS():
reply = QMessageBox.question(self, self.tr("Extent CRS"),
self.tr('Extent parameters must use the same CRS as the input layers.\n'
'Your input layers do not have the same extent as the project, '
'so the extent might be in a wrong CRS if you have selected it from the canvas.\n'
'Do you want to continue?'),
QMessageBox.Yes | QMessageBox.No,
QMessageBox.No)
if reply == QMessageBox.No:
return
ok, msg = self.alg.checkParameterValues(parameters, context)
if msg:
QMessageBox.warning(
self, self.tr('Unable to execute algorithm'), msg)
return
self.btnRun.setEnabled(False)
self.btnClose.setEnabled(False)
buttons = self.mainWidget.iterateButtons
self.iterateParam = None
for i in range(len(list(buttons.values()))):
button = list(buttons.values())[i]
if button.isChecked():
self.iterateParam = list(buttons.keys())[i]
break
self.progressBar.setMaximum(0)
self.lblProgress.setText(self.tr('Processing algorithm...'))
# Make sure the Log tab is visible before executing the algorithm
try:
self.tabWidget.setCurrentIndex(1)
self.repaint()
except:
pass
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
self.setInfo(
self.tr('<b>Algorithm \'{0}\' starting...</b>').format(self.alg.displayName()), escape_html=False)
feedback.pushInfo(self.tr('Input parameters:'))
feedback.pushCommandInfo(pformat(parameters))
feedback.pushInfo('')
start_time = time.time()
if self.iterateParam:
self.buttonCancel.setEnabled(self.alg.flags() & QgsProcessingAlgorithm.FlagCanCancel)
if executeIterating(self.alg, parameters, self.iterateParam, context, feedback):
feedback.pushInfo(
self.tr('Execution completed in {0:0.2f} seconds'.format(time.time() - start_time)))
self.buttonCancel.setEnabled(False)
self.finish(parameters, context, feedback)
else:
self.buttonCancel.setEnabled(False)
QApplication.restoreOverrideCursor()
self.resetGUI()
else:
command = self.alg.asPythonCommand(parameters, context)
if command:
ProcessingLog.addToLog(command)
self.buttonCancel.setEnabled(self.alg.flags() & QgsProcessingAlgorithm.FlagCanCancel)
result, ok = executeAlgorithm(self.alg, parameters, context, feedback)
if ok:
feedback.pushInfo(self.tr('Execution completed in {0:0.2f} seconds'.format(time.time() - start_time)))
feedback.pushInfo(self.tr('Results:'))
feedback.pushCommandInfo(pformat(result))
else:
feedback.reportError(
self.tr('Execution failed after {0:0.2f} seconds'.format(time.time() - start_time)))
feedback.pushInfo('')
self.buttonCancel.setEnabled(False)
self.finish(result, context, feedback)
except AlgorithmDialogBase.InvalidParameterValue as e:
try:
self.buttonBox.accepted.connect(lambda e=e:
e.widget.setPalette(QPalette()))
palette = e.widget.palette()
palette.setColor(QPalette.Base, QColor(255, 255, 0))
e.widget.setPalette(palette)
except:
pass
self.bar.clearWidgets()
self.bar.pushMessage("", self.tr("Wrong or missing parameter value: {0}").format(e.parameter.description()),
level=QgsMessageBar.WARNING, duration=5)
def finish(self, result, context, feedback):
keepOpen = ProcessingConfig.getSetting(ProcessingConfig.KEEP_DIALOG_OPEN)
if self.iterateParam is None:
if not handleAlgorithmResults(self.alg, context, feedback, not keepOpen):
self.resetGUI()
return
self.executed = True
self.setInfo(self.tr('Algorithm \'{0}\' finished').format(self.alg.displayName()), escape_html=False)
QApplication.restoreOverrideCursor()
if not keepOpen:
self.close()
else:
self.resetGUI()
if self.alg.hasHtmlOutputs():
self.setInfo(
self.tr('HTML output has been generated by this algorithm.'
'\nOpen the results dialog to check it.'), escape_html=False)