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"""
***************************************************************************
GdalAlgorithmDialog.py
---------------------
Date : May 2015
Copyright : (C) 2015 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__ = "May 2015"
__copyright__ = "(C) 2015, Victor Olaya"
from qgis.PyQt.QtCore import QCoreApplication
from qgis.PyQt.QtWidgets import (
QWidget,
QVBoxLayout,
QPushButton,
QLabel,
QPlainTextEdit,
QLineEdit,
QComboBox,
QCheckBox,
QSizePolicy,
QDialogButtonBox,
)
from qgis.core import (
QgsProcessingException,
QgsProcessingFeedback,
QgsProcessingParameterDefinition,
)
from qgis.gui import (
QgsMessageBar,
QgsProjectionSelectionWidget,
QgsProcessingAlgorithmDialogBase,
QgsProcessingLayerOutputDestinationWidget,
)
from processing.gui.AlgorithmDialog import AlgorithmDialog
from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
from processing.gui.ParametersPanel import ParametersPanel
from processing.gui.MultipleInputPanel import MultipleInputPanel
from processing.gui.NumberInputPanel import NumberInputPanel
from processing.gui.wrappers import WidgetWrapper
from processing.tools.dataobjects import createContext
class GdalAlgorithmDialog(AlgorithmDialog):
def __init__(self, alg, parent=None):
super().__init__(alg, parent=parent)
self.mainWidget().parametersHaveChanged()
def getParametersPanel(self, alg, parent):
return GdalParametersPanel(parent, alg)
class GdalParametersPanel(ParametersPanel):
def __init__(self, parent, alg):
super().__init__(parent, alg)
self.dialog = parent
w = QWidget()
layout = QVBoxLayout()
layout.setMargin(0)
layout.setSpacing(6)
label = QLabel()
label.setText(self.tr("GDAL/OGR console call"))
layout.addWidget(label)
self.text = QPlainTextEdit()
self.text.setReadOnly(True)
layout.addWidget(self.text)
w.setLayout(layout)
self.addExtraWidget(w)
self.connectParameterSignals()
self.parametersHaveChanged()
def connectParameterSignals(self):
for wrapper in list(self.wrappers.values()):
wrapper.widgetValueHasChanged.connect(self.parametersHaveChanged)
# TODO - remove when all wrappers correctly emit widgetValueHasChanged!
# For compatibility with 3.x API, we need to check whether the wrapper is
# the deprecated WidgetWrapper class. If not, it's the newer
# QgsAbstractProcessingParameterWidgetWrapper class
# TODO QGIS 4.0 - remove
if issubclass(wrapper.__class__, WidgetWrapper):
w = wrapper.widget
else:
w = wrapper.wrappedWidget()
self.connectWidgetChangedSignals(w)
for c in w.findChildren(QWidget):
self.connectWidgetChangedSignals(c)
def connectWidgetChangedSignals(self, w):
if isinstance(w, QLineEdit):
w.textChanged.connect(self.parametersHaveChanged)
elif isinstance(w, QComboBox):
w.currentIndexChanged.connect(self.parametersHaveChanged)
elif isinstance(w, QgsProjectionSelectionWidget):
w.crsChanged.connect(self.parametersHaveChanged)
elif isinstance(w, QCheckBox):
w.stateChanged.connect(self.parametersHaveChanged)
elif isinstance(w, MultipleInputPanel):
w.selectionChanged.connect(self.parametersHaveChanged)
elif isinstance(w, NumberInputPanel):
w.hasChanged.connect(self.parametersHaveChanged)
elif isinstance(w, QgsProcessingLayerOutputDestinationWidget):
w.destinationChanged.connect(self.parametersHaveChanged)
def parametersHaveChanged(self):
context = createContext()
feedback = QgsProcessingFeedback()
try:
# messy as all heck, but we don't want to call the dialog's implementation of
# createProcessingParameters as we want to catch the exceptions raised by the
# parameter panel instead...
parameters = (
{}
if self.dialog.mainWidget() is None
else self.dialog.mainWidget().createProcessingParameters()
)
for output in self.algorithm().destinationParameterDefinitions():
if not output.name() in parameters or parameters[output.name()] is None:
if (
not output.flags()
& QgsProcessingParameterDefinition.Flag.FlagOptional
):
parameters[output.name()] = self.tr("[temporary file]")
for p in self.algorithm().parameterDefinitions():
if p.flags() & QgsProcessingParameterDefinition.Flag.FlagHidden:
continue
if (
p.flags() & QgsProcessingParameterDefinition.Flag.FlagOptional
and p.name() not in parameters
):
continue
if p.name() not in parameters or not p.checkValueIsAcceptable(
parameters[p.name()]
):
# not ready yet
self.text.setPlainText("")
return
try:
commands = self.algorithm().getConsoleCommands(
parameters, context, feedback, executing=False
)
commands = [c for c in commands if c not in ["cmd.exe", "/C "]]
self.text.setPlainText(" ".join(commands))
except QgsProcessingException as e:
self.text.setPlainText(str(e))
except AlgorithmDialogBase.InvalidParameterValue as e:
self.text.setPlainText(
self.tr("Invalid value for parameter '{0}'").format(
e.parameter.description()
)
)
except AlgorithmDialogBase.InvalidOutputExtension as e:
self.text.setPlainText(e.message)
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