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176 lines
6.7 KiB
Python
176 lines
6.7 KiB
Python
"""
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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 (
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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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)
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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 (
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QgsMessageBar,
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QgsProjectionSelectionWidget,
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QgsProcessingAlgorithmDialogBase,
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QgsProcessingLayerOutputDestinationWidget,
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)
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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 = (
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{}
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if self.dialog.mainWidget() is None
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else self.dialog.mainWidget().createProcessingParameters()
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)
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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 (
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not output.flags()
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& QgsProcessingParameterDefinition.Flag.FlagOptional
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):
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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.Flag.FlagHidden:
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continue
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if (
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p.flags() & QgsProcessingParameterDefinition.Flag.FlagOptional
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and p.name() not in parameters
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):
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continue
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if p.name() not in parameters or not p.checkValueIsAcceptable(
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parameters[p.name()]
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):
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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(
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parameters, context, feedback, executing=False
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)
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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(
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self.tr("Invalid value for parameter '{0}'").format(
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e.parameter.description()
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)
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)
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except AlgorithmDialogBase.InvalidOutputExtension as e:
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self.text.setPlainText(e.message)
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