/
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. *
* *
***************************************************************************
"""
__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 qgis.PyQt.QtCore import Qt
from qgis.PyQt.QtWidgets import QMessageBox, QApplication, QPushButton, QWidget, QVBoxLayout
from qgis.PyQt.QtGui import QCursor, QColor, QPalette
from qgis.core import QgsMapLayerRegistry, QgsExpressionContext, QgsExpressionContextUtils, QgsExpression
from processing.core.ProcessingLog import ProcessingLog
from processing.core.ProcessingConfig import ProcessingConfig
from processing.gui.BatchAlgorithmDialog import BatchAlgorithmDialog
from processing.gui.ParametersPanel import ParametersPanel
from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
from processing.gui.AlgorithmExecutor import runalg, runalgIterating
from processing.gui.Postprocessing import handleAlgorithmResults
from processing.core.parameters import ParameterExtent
from processing.core.parameters import ParameterRaster
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterTable
from processing.core.parameters import ParameterBoolean
from processing.core.parameters import ParameterSelection
from processing.core.parameters import ParameterFixedTable
from processing.core.parameters import ParameterRange
from processing.core.parameters import ParameterTableField
from processing.core.parameters import ParameterMultipleInput
from processing.core.parameters import ParameterString
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterFile
from processing.core.parameters import ParameterCrs
from processing.core.parameters import ParameterPoint
from processing.core.parameters import ParameterGeometryPredicate
from processing.core.outputs import OutputRaster
from processing.core.outputs import OutputVector
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.mainWidget = ParametersPanel(self, alg)
self.setMainWidget()
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)
QgsMapLayerRegistry.instance().layerWasAdded.connect(self.mainWidget.layerAdded)
QgsMapLayerRegistry.instance().layersWillBeRemoved.connect(self.mainWidget.layersWillBeRemoved)
def runAsBatch(self):
dlg = BatchAlgorithmDialog(self.alg)
dlg.exec_()
def setParamValues(self):
params = self.alg.parameters
outputs = self.alg.outputs
for param in params:
if param.hidden:
continue
if isinstance(param, ParameterExtent):
continue
if not self.setParamValue(
param, self.mainWidget.valueItems[param.name]):
raise AlgorithmDialogBase.InvalidParameterValue(
param, self.mainWidget.valueItems[param.name])
for param in params:
if isinstance(param, ParameterExtent):
if not self.setParamValue(
param, self.mainWidget.valueItems[param.name]):
raise AlgorithmDialogBase.InvalidParameterValue(
param, self.mainWidget.valueItems[param.name])
for output in outputs:
if output.hidden:
continue
output.value = self.mainWidget.valueItems[output.name].getValue()
if isinstance(output, (OutputRaster, OutputVector, OutputTable)):
output.open = self.mainWidget.checkBoxes[output.name].isChecked()
return True
def evaluateExpression(self, text):
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope())
exp = QgsExpression(text)
if exp.hasParserError():
raise Exception(exp.parserErrorString())
result = exp.evaluate(context)
if exp.hasEvalError():
raise ValueError(exp.evalErrorString())
return result
def setParamValue(self, param, widget, alg=None):
if isinstance(param, ParameterRaster):
return param.setValue(widget.getValue())
elif isinstance(param, (ParameterVector, ParameterTable)):
try:
return param.setValue(widget.itemData(widget.currentIndex()))
except:
return param.setValue(widget.getValue())
elif isinstance(param, ParameterBoolean):
return param.setValue(widget.isChecked())
elif isinstance(param, ParameterSelection):
return param.setValue(widget.currentIndex())
elif isinstance(param, ParameterFixedTable):
return param.setValue(widget.table)
elif isinstance(param, ParameterRange):
return param.setValue(widget.getValue())
if isinstance(param, ParameterTableField):
if param.optional and widget.currentIndex() == 0:
return param.setValue(None)
return param.setValue(widget.currentText())
elif isinstance(param, ParameterMultipleInput):
if param.datatype == ParameterMultipleInput.TYPE_FILE:
return param.setValue(widget.selectedoptions)
else:
if param.datatype == ParameterMultipleInput.TYPE_RASTER:
options = dataobjects.getRasterLayers(sorting=False)
elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
options = dataobjects.getVectorLayers(sorting=False)
else:
options = dataobjects.getVectorLayers([param.datatype], sorting=False)
return param.setValue([options[i] for i in widget.selectedoptions])
elif isinstance(param, (ParameterNumber, ParameterFile, ParameterCrs,
ParameterExtent, ParameterPoint)):
return param.setValue(widget.getValue())
elif isinstance(param, ParameterString):
if param.multiline:
return param.setValue(unicode(widget.toPlainText()))
else:
text = widget.text()
try:
text = self.evaluateExpression(text)
except:
pass
return param.setValue(text)
elif isinstance(param, ParameterGeometryPredicate):
return param.setValue(widget.value())
else:
return param.setValue(unicode(widget.text()))
def accept(self):
self.settings.setValue("/Processing/dialogBase", self.saveGeometry())
checkCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_CRS)
try:
self.setParamValues()
if checkCRS and not self.alg.checkInputCRS():
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
msg = self.alg._checkParameterValuesBeforeExecuting()
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(buttons.values())):
button = buttons.values()[i]
if button.isChecked():
self.iterateParam = 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 %s starting...</b>') % self.alg.name)
if self.iterateParam:
if runalgIterating(self.alg, self.iterateParam, self):
self.finish()
else:
QApplication.restoreOverrideCursor()
self.resetGUI()
else:
command = self.alg.getAsCommand()
if command:
ProcessingLog.addToLog(
ProcessingLog.LOG_ALGORITHM, command)
if runalg(self.alg, self):
self.finish()
else:
QApplication.restoreOverrideCursor()
self.resetGUI()
except AlgorithmDialogBase.InvalidParameterValue as e:
try:
self.buttonBox.accepted.connect(lambda:
e.widget.setPalette(QPalette()))
palette = e.widget.palette()
palette.setColor(QPalette.Base, QColor(255, 255, 0))
e.widget.setPalette(palette)
self.lblProgress.setText(
self.tr('<b>Missing parameter value: %s</b>') % e.parameter.description)
return
except:
QMessageBox.critical(self,
self.tr('Unable to execute algorithm'),
self.tr('Wrong or missing parameter values'))
def finish(self):
keepOpen = ProcessingConfig.getSetting(ProcessingConfig.KEEP_DIALOG_OPEN)
if self.iterateParam is None:
if not handleAlgorithmResults(self.alg, self, not keepOpen):
self.resetGUI()
return
self.executed = True
self.setInfo('Algorithm %s finished' % self.alg.name)
QApplication.restoreOverrideCursor()
if not keepOpen:
self.close()
else:
self.resetGUI()
if self.alg.getHTMLOutputsCount() > 0:
self.setInfo(
self.tr('HTML output has been generated by this algorithm.'
'\nOpen the results dialog to check it.'))
def closeEvent(self, evt):
QgsMapLayerRegistry.instance().layerWasAdded.disconnect(self.mainWidget.layerAdded)
QgsMapLayerRegistry.instance().layersWillBeRemoved.disconnect(self.mainWidget.layersWillBeRemoved)
super(AlgorithmDialog, self).closeEvent(evt)