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84c3613cf7
GDAL commands for invalid layers This is a partial fix, which at least removes the uncaught exception. Ideally we'd gracefully fall back to using the layer's source (even if it doesn't exist!) in the generated GDAL commands. But that's far from trivial to do. Fixes #51958
156 lines
6.6 KiB
Python
156 lines
6.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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GdalAlgorithmDialog.py
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---------------------
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Date : May 2015
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Copyright : (C) 2015 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__ = 'May 2015'
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__copyright__ = '(C) 2015, Victor Olaya'
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from qgis.PyQt.QtCore import QCoreApplication
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from qgis.PyQt.QtWidgets import (QWidget,
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QVBoxLayout,
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QPushButton,
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QLabel,
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QPlainTextEdit,
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QLineEdit,
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QComboBox,
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QCheckBox,
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QSizePolicy,
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QDialogButtonBox)
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from qgis.core import (
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QgsProcessingException,
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QgsProcessingFeedback,
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QgsProcessingParameterDefinition
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)
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from qgis.gui import (QgsMessageBar,
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QgsProjectionSelectionWidget,
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QgsProcessingAlgorithmDialogBase,
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QgsProcessingLayerOutputDestinationWidget)
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from processing.gui.AlgorithmDialog import AlgorithmDialog
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from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
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from processing.gui.ParametersPanel import ParametersPanel
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from processing.gui.MultipleInputPanel import MultipleInputPanel
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from processing.gui.NumberInputPanel import NumberInputPanel
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from processing.gui.wrappers import WidgetWrapper
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from processing.tools.dataobjects import createContext
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class GdalAlgorithmDialog(AlgorithmDialog):
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def __init__(self, alg, parent=None):
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super().__init__(alg, parent=parent)
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self.mainWidget().parametersHaveChanged()
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def getParametersPanel(self, alg, parent):
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return GdalParametersPanel(parent, alg)
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class GdalParametersPanel(ParametersPanel):
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def __init__(self, parent, alg):
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super().__init__(parent, alg)
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self.dialog = parent
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w = QWidget()
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layout = QVBoxLayout()
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layout.setMargin(0)
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layout.setSpacing(6)
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label = QLabel()
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label.setText(self.tr("GDAL/OGR console call"))
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layout.addWidget(label)
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self.text = QPlainTextEdit()
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self.text.setReadOnly(True)
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layout.addWidget(self.text)
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w.setLayout(layout)
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self.addExtraWidget(w)
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self.connectParameterSignals()
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self.parametersHaveChanged()
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def connectParameterSignals(self):
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for wrapper in list(self.wrappers.values()):
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wrapper.widgetValueHasChanged.connect(self.parametersHaveChanged)
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# TODO - remove when all wrappers correctly emit widgetValueHasChanged!
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# For compatibility with 3.x API, we need to check whether the wrapper is
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# the deprecated WidgetWrapper class. If not, it's the newer
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# QgsAbstractProcessingParameterWidgetWrapper class
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# TODO QGIS 4.0 - remove
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if issubclass(wrapper.__class__, WidgetWrapper):
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w = wrapper.widget
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else:
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w = wrapper.wrappedWidget()
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self.connectWidgetChangedSignals(w)
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for c in w.findChildren(QWidget):
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self.connectWidgetChangedSignals(c)
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def connectWidgetChangedSignals(self, w):
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if isinstance(w, QLineEdit):
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w.textChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, QComboBox):
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w.currentIndexChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, QgsProjectionSelectionWidget):
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w.crsChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, QCheckBox):
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w.stateChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, MultipleInputPanel):
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w.selectionChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, NumberInputPanel):
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w.hasChanged.connect(self.parametersHaveChanged)
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elif isinstance(w, QgsProcessingLayerOutputDestinationWidget):
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w.destinationChanged.connect(self.parametersHaveChanged)
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def parametersHaveChanged(self):
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context = createContext()
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feedback = QgsProcessingFeedback()
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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.dialog.mainWidget() is None else self.dialog.mainWidget().createProcessingParameters()
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for output in self.algorithm().destinationParameterDefinitions():
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if not output.name() in parameters or parameters[output.name()] is None:
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if not output.flags() & QgsProcessingParameterDefinition.FlagOptional:
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parameters[output.name()] = self.tr("[temporary file]")
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for p in self.algorithm().parameterDefinitions():
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if p.flags() & QgsProcessingParameterDefinition.FlagHidden:
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continue
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if p.flags() & QgsProcessingParameterDefinition.FlagOptional and p.name() not in parameters:
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continue
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if p.name() not in parameters or not p.checkValueIsAcceptable(parameters[p.name()]):
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# not ready yet
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self.text.setPlainText('')
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return
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try:
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commands = self.algorithm().getConsoleCommands(parameters, context, feedback, executing=False)
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commands = [c for c in commands if c not in ['cmd.exe', '/C ']]
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self.text.setPlainText(" ".join(commands))
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except QgsProcessingException as e:
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self.text.setPlainText(str(e))
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except AlgorithmDialogBase.InvalidParameterValue as e:
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self.text.setPlainText(self.tr("Invalid value for parameter '{0}'").format(e.parameter.description()))
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except AlgorithmDialogBase.InvalidOutputExtension as e:
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self.text.setPlainText(e.message)
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