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# -*- coding: utf-8 -*-
"""
***************************************************************************
OutputSelectionPanel.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__ = '$Format:%H$'
import re
import os
from qgis.PyQt import uic
from qgis.PyQt.QtCore import QCoreApplication, QSettings
from qgis.PyQt.QtWidgets import QDialog, QMenu, QAction, QFileDialog
from qgis.PyQt.QtGui import QCursor
from qgis.gui import QgsEncodingFileDialog, QgsExpressionBuilderDialog
from qgis.core import (QgsDataSourceURI,
QgsCredentials,
QgsExpressionContext,
QgsExpressionContextUtils,
QgsExpression,
QgsExpressionContextScope)
from processing.core.ProcessingConfig import ProcessingConfig
from processing.core.outputs import OutputVector
from processing.core.outputs import OutputDirectory
from processing.gui.PostgisTableSelector import PostgisTableSelector
pluginPath = os.path.split(os.path.dirname(__file__))[0]
WIDGET, BASE = uic.loadUiType(
os.path.join(pluginPath, 'ui', 'widgetBaseSelector.ui'))
class OutputSelectionPanel(BASE, WIDGET):
SAVE_TO_TEMP_FILE = QCoreApplication.translate(
'OutputSelectionPanel', '[Save to temporary file]')
SAVE_TO_TEMP_LAYER = QCoreApplication.translate(
'OutputSelectionPanel', '[Create temporary layer]')
def __init__(self, output, alg):
super(OutputSelectionPanel, self).__init__(None)
self.setupUi(self)
self.output = output
self.alg = alg
if hasattr(self.leText, 'setPlaceholderText'):
if isinstance(output, OutputVector) \
and alg.provider.supportsNonFileBasedOutput():
# use memory layers for temporary files if supported
self.leText.setPlaceholderText(self.SAVE_TO_TEMP_LAYER)
else:
self.leText.setPlaceholderText(self.SAVE_TO_TEMP_FILE)
self.btnSelect.clicked.connect(self.selectOutput)
def selectOutput(self):
if isinstance(self.output, OutputDirectory):
self.selectDirectory()
else:
popupMenu = QMenu()
if isinstance(self.output, OutputVector) \
and self.alg.provider.supportsNonFileBasedOutput():
# use memory layers for temporary files if supported
actionSaveToTempFile = QAction(
self.tr('Create temporary layer'), self.btnSelect)
else:
actionSaveToTempFile = QAction(
self.tr('Save to a temporary file'), self.btnSelect)
actionSaveToTempFile.triggered.connect(self.saveToTemporaryFile)
popupMenu.addAction(actionSaveToTempFile)
actionSaveToFile = QAction(
self.tr('Save to file...'), self.btnSelect)
actionSaveToFile.triggered.connect(self.selectFile)
popupMenu.addAction(actionSaveToFile)
actionShowExpressionsBuilder = QAction(
self.tr('Use expression...'), self.btnSelect)
actionShowExpressionsBuilder.triggered.connect(self.showExpressionsBuilder)
popupMenu.addAction(actionShowExpressionsBuilder)
if isinstance(self.output, OutputVector) \
and self.alg.provider.supportsNonFileBasedOutput():
actionSaveToSpatialite = QAction(
self.tr('Save to Spatialite table...'), self.btnSelect)
actionSaveToSpatialite.triggered.connect(self.saveToSpatialite)
popupMenu.addAction(actionSaveToSpatialite)
actionSaveToPostGIS = QAction(
self.tr('Save to PostGIS table...'), self.btnSelect)
actionSaveToPostGIS.triggered.connect(self.saveToPostGIS)
settings = QSettings()
settings.beginGroup('/PostgreSQL/connections/')
names = settings.childGroups()
settings.endGroup()
actionSaveToPostGIS.setEnabled(bool(names))
popupMenu.addAction(actionSaveToPostGIS)
popupMenu.exec_(QCursor.pos())
def showExpressionsBuilder(self):
dlg = QgsExpressionBuilderDialog(None, self.leText.text(), self, 'generic', self.expressionContext())
dlg.setWindowTitle(self.tr('Expression based output'))
if dlg.exec_() == QDialog.Accepted:
self.leText.setText(dlg.expressionText())
def expressionContext(self):
context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.globalScope())
context.appendScope(QgsExpressionContextUtils.projectScope())
processingScope = QgsExpressionContextScope()
for param in self.alg.parameters:
processingScope.setVariable('%s_value' % param.name, '')
context.appendScope(processingScope)
return context
def saveToTemporaryFile(self):
self.leText.setText('')
def saveToPostGIS(self):
dlg = PostgisTableSelector(self, self.output.name.lower())
dlg.exec_()
if dlg.connection:
settings = QSettings()
mySettings = '/PostgreSQL/connections/' + dlg.connection
dbname = settings.value(mySettings + '/database')
user = settings.value(mySettings + '/username')
host = settings.value(mySettings + '/host')
port = settings.value(mySettings + '/port')
password = settings.value(mySettings + '/password')
uri = QgsDataSourceURI()
uri.setConnection(host, str(port), dbname, user, password)
uri.setDataSource(dlg.schema, dlg.table,
"the_geom" if self.output.hasGeometry() else None)
connInfo = uri.connectionInfo()
(success, user, passwd) = QgsCredentials.instance().get(connInfo, None, None)
if success:
QgsCredentials.instance().put(connInfo, user, passwd)
self.leText.setText("postgis:" + uri.uri())
def saveToSpatialite(self):
fileFilter = self.output.tr('Spatialite files(*.sqlite)', 'OutputFile')
settings = QSettings()
if settings.contains('/Processing/LastOutputPath'):
path = settings.value('/Processing/LastOutputPath')
else:
path = ProcessingConfig.getSetting(ProcessingConfig.OUTPUT_FOLDER)
encoding = settings.value('/Processing/encoding', 'System')
fileDialog = QgsEncodingFileDialog(
self, self.tr('Save Spatialite'), path, fileFilter, encoding)
fileDialog.setFileMode(QFileDialog.AnyFile)
fileDialog.setAcceptMode(QFileDialog.AcceptSave)
fileDialog.setConfirmOverwrite(False)
if fileDialog.exec_() == QDialog.Accepted:
files = fileDialog.selectedFiles()
encoding = unicode(fileDialog.encoding())
self.output.encoding = encoding
fileName = unicode(files[0])
selectedFileFilter = unicode(fileDialog.selectedNameFilter())
if not fileName.lower().endswith(
tuple(re.findall("\*(\.[a-z]{1,10})", fileFilter))):
ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
if ext:
fileName += ext.group(1)
settings.setValue('/Processing/LastOutputPath',
os.path.dirname(fileName))
settings.setValue('/Processing/encoding', encoding)
uri = QgsDataSourceURI()
uri.setDatabase(fileName)
uri.setDataSource('', self.output.name.lower(),
'the_geom' if self.output.hasGeometry() else None)
self.leText.setText("spatialite:" + uri.uri())
def selectFile(self):
fileFilter = self.output.getFileFilter(self.alg)
settings = QSettings()
if settings.contains('/Processing/LastOutputPath'):
path = settings.value('/Processing/LastOutputPath')
else:
path = ProcessingConfig.getSetting(ProcessingConfig.OUTPUT_FOLDER)
encoding = settings.value('/Processing/encoding', 'System')
fileDialog = QgsEncodingFileDialog(
self, self.tr('Save file'), path, fileFilter, encoding)
fileDialog.setFileMode(QFileDialog.AnyFile)
fileDialog.setAcceptMode(QFileDialog.AcceptSave)
fileDialog.setConfirmOverwrite(True)
if fileDialog.exec_() == QDialog.Accepted:
files = fileDialog.selectedFiles()
encoding = unicode(fileDialog.encoding())
self.output.encoding = encoding
fileName = unicode(files[0])
selectedFileFilter = unicode(fileDialog.selectedNameFilter())
if not fileName.lower().endswith(
tuple(re.findall("\*(\.[a-z]{1,10})", fileFilter))):
ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
if ext:
fileName += ext.group(1)
self.leText.setText(fileName)
settings.setValue('/Processing/LastOutputPath',
os.path.dirname(fileName))
settings.setValue('/Processing/encoding', encoding)
def selectDirectory(self):
lastDir = ''
dirName = QFileDialog.getExistingDirectory(self, self.tr('Select directory'),
lastDir, QFileDialog.ShowDirsOnly)
self.leText.setText(dirName)
def getValue(self):
fileName = unicode(self.leText.text())
context = self.expressionContext()
exp = QgsExpression(fileName)
if not exp.hasParserError():
result = exp.evaluate(context)
if not exp.hasEvalError():
fileName = result
if fileName.startswith("[") and fileName.endswith("]"):
fileName = fileName[1:-1]
if fileName.strip() in ['', self.SAVE_TO_TEMP_FILE, self.SAVE_TO_TEMP_LAYER]:
if isinstance(self.output, OutputVector) \
and self.alg.provider.supportsNonFileBasedOutput():
# use memory layers for temporary files if supported
value = 'memory:'
else:
value = None
elif fileName.startswith('memory:'):
value = fileName
elif fileName.startswith('postgis:'):
value = fileName
elif fileName.startswith('spatialite:'):
value = fileName
elif not os.path.isabs(fileName):
value = ProcessingConfig.getSetting(
ProcessingConfig.OUTPUT_FOLDER) + os.sep + fileName
else:
value = fileName
return value
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