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001ae44b67
when writing to a temporary result Avoids truncation of field names and other format specific limitations
268 lines
11 KiB
Python
268 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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OutputSelectionPanel.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 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__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import re
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import os
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from qgis.PyQt import uic
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from qgis.PyQt.QtCore import QCoreApplication, QSettings
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from qgis.PyQt.QtWidgets import QDialog, QMenu, QAction, QFileDialog
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from qgis.PyQt.QtGui import QCursor
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from qgis.gui import QgsEncodingFileDialog, QgsExpressionBuilderDialog
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from qgis.core import (QgsDataSourceUri,
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QgsCredentials,
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QgsExpressionContext,
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QgsExpressionContextUtils,
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QgsExpression,
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QgsExpressionContextScope)
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from processing.core.ProcessingConfig import ProcessingConfig
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from processing.core.outputs import OutputVector
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from processing.core.outputs import OutputDirectory
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from processing.gui.PostgisTableSelector import PostgisTableSelector
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pluginPath = os.path.split(os.path.dirname(__file__))[0]
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WIDGET, BASE = uic.loadUiType(
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os.path.join(pluginPath, 'ui', 'widgetBaseSelector.ui'))
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class OutputSelectionPanel(BASE, WIDGET):
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SAVE_TO_TEMP_FILE = QCoreApplication.translate(
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'OutputSelectionPanel', '[Save to temporary file]')
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SAVE_TO_TEMP_LAYER = QCoreApplication.translate(
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'OutputSelectionPanel', '[Create temporary layer]')
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def __init__(self, output, alg):
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super(OutputSelectionPanel, self).__init__(None)
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self.setupUi(self)
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self.output = output
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self.alg = alg
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if hasattr(self.leText, 'setPlaceholderText'):
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if isinstance(output, OutputVector) \
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and alg.provider.supportsNonFileBasedOutput():
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# use memory layers for temporary files if supported
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self.leText.setPlaceholderText(self.SAVE_TO_TEMP_LAYER)
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else:
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self.leText.setPlaceholderText(self.SAVE_TO_TEMP_FILE)
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self.btnSelect.clicked.connect(self.selectOutput)
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def selectOutput(self):
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if isinstance(self.output, OutputDirectory):
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self.selectDirectory()
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else:
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popupMenu = QMenu()
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if isinstance(self.output, OutputVector) \
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and self.alg.provider.supportsNonFileBasedOutput():
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# use memory layers for temporary files if supported
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actionSaveToTempFile = QAction(
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self.tr('Create temporary layer'), self.btnSelect)
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else:
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actionSaveToTempFile = QAction(
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self.tr('Save to a temporary file'), self.btnSelect)
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actionSaveToTempFile.triggered.connect(self.saveToTemporaryFile)
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popupMenu.addAction(actionSaveToTempFile)
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actionSaveToFile = QAction(
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self.tr('Save to file...'), self.btnSelect)
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actionSaveToFile.triggered.connect(self.selectFile)
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popupMenu.addAction(actionSaveToFile)
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actionShowExpressionsBuilder = QAction(
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self.tr('Use expression...'), self.btnSelect)
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actionShowExpressionsBuilder.triggered.connect(self.showExpressionsBuilder)
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popupMenu.addAction(actionShowExpressionsBuilder)
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if isinstance(self.output, OutputVector) \
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and self.alg.provider.supportsNonFileBasedOutput():
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actionSaveToSpatialite = QAction(
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self.tr('Save to Spatialite table...'), self.btnSelect)
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actionSaveToSpatialite.triggered.connect(self.saveToSpatialite)
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popupMenu.addAction(actionSaveToSpatialite)
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actionSaveToPostGIS = QAction(
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self.tr('Save to PostGIS table...'), self.btnSelect)
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actionSaveToPostGIS.triggered.connect(self.saveToPostGIS)
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settings = QSettings()
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settings.beginGroup('/PostgreSQL/connections/')
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names = settings.childGroups()
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settings.endGroup()
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actionSaveToPostGIS.setEnabled(bool(names))
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popupMenu.addAction(actionSaveToPostGIS)
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popupMenu.exec_(QCursor.pos())
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def showExpressionsBuilder(self):
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dlg = QgsExpressionBuilderDialog(None, self.leText.text(), self, 'generic', self.expressionContext())
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dlg.setWindowTitle(self.tr('Expression based output'))
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if dlg.exec_() == QDialog.Accepted:
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self.leText.setText(dlg.expressionText())
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def expressionContext(self):
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context = QgsExpressionContext()
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context.appendScope(QgsExpressionContextUtils.globalScope())
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context.appendScope(QgsExpressionContextUtils.projectScope())
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processingScope = QgsExpressionContextScope()
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for param in self.alg.parameters:
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processingScope.setVariable('%s_value' % param.name, '')
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context.appendScope(processingScope)
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return context
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def saveToTemporaryFile(self):
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self.leText.setText('')
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def saveToPostGIS(self):
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dlg = PostgisTableSelector(self, self.output.name.lower())
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dlg.exec_()
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if dlg.connection:
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settings = QSettings()
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mySettings = '/PostgreSQL/connections/' + dlg.connection
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dbname = settings.value(mySettings + '/database')
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user = settings.value(mySettings + '/username')
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host = settings.value(mySettings + '/host')
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port = settings.value(mySettings + '/port')
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password = settings.value(mySettings + '/password')
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uri = QgsDataSourceUri()
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uri.setConnection(host, str(port), dbname, user, password)
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uri.setDataSource(dlg.schema, dlg.table,
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"the_geom" if self.output.hasGeometry() else None)
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connInfo = uri.connectionInfo()
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(success, user, passwd) = QgsCredentials.instance().get(connInfo, None, None)
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if success:
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QgsCredentials.instance().put(connInfo, user, passwd)
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self.leText.setText("postgis:" + uri.uri())
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def saveToSpatialite(self):
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fileFilter = self.output.tr('Spatialite files(*.sqlite)', 'OutputFile')
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settings = QSettings()
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if settings.contains('/Processing/LastOutputPath'):
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path = settings.value('/Processing/LastOutputPath')
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else:
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path = ProcessingConfig.getSetting(ProcessingConfig.OUTPUT_FOLDER)
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encoding = settings.value('/Processing/encoding', 'System')
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fileDialog = QgsEncodingFileDialog(
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self, self.tr('Save Spatialite'), path, fileFilter, encoding)
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fileDialog.setFileMode(QFileDialog.AnyFile)
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fileDialog.setAcceptMode(QFileDialog.AcceptSave)
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fileDialog.setConfirmOverwrite(False)
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if fileDialog.exec_() == QDialog.Accepted:
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files = fileDialog.selectedFiles()
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encoding = unicode(fileDialog.encoding())
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self.output.encoding = encoding
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fileName = unicode(files[0])
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selectedFileFilter = unicode(fileDialog.selectedNameFilter())
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if not fileName.lower().endswith(
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tuple(re.findall("\*(\.[a-z]{1,10})", fileFilter))):
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ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
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if ext:
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fileName += ext.group(1)
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settings.setValue('/Processing/LastOutputPath',
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os.path.dirname(fileName))
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settings.setValue('/Processing/encoding', encoding)
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uri = QgsDataSourceUri()
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uri.setDatabase(fileName)
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uri.setDataSource('', self.output.name.lower(),
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'the_geom' if self.output.hasGeometry() else None)
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self.leText.setText("spatialite:" + uri.uri())
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def selectFile(self):
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fileFilter = self.output.getFileFilter(self.alg)
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settings = QSettings()
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if settings.contains('/Processing/LastOutputPath'):
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path = settings.value('/Processing/LastOutputPath')
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else:
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path = ProcessingConfig.getSetting(ProcessingConfig.OUTPUT_FOLDER)
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encoding = settings.value('/Processing/encoding', 'System')
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fileDialog = QgsEncodingFileDialog(
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self, self.tr('Save file'), path, fileFilter, encoding)
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fileDialog.setFileMode(QFileDialog.AnyFile)
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fileDialog.setAcceptMode(QFileDialog.AcceptSave)
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fileDialog.setConfirmOverwrite(True)
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if fileDialog.exec_() == QDialog.Accepted:
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files = fileDialog.selectedFiles()
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encoding = unicode(fileDialog.encoding())
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self.output.encoding = encoding
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fileName = unicode(files[0])
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selectedFileFilter = unicode(fileDialog.selectedNameFilter())
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if not fileName.lower().endswith(
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tuple(re.findall("\*(\.[a-z]{1,10})", fileFilter))):
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ext = re.search("\*(\.[a-z]{1,10})", selectedFileFilter)
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if ext:
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fileName += ext.group(1)
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self.leText.setText(fileName)
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settings.setValue('/Processing/LastOutputPath',
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os.path.dirname(fileName))
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settings.setValue('/Processing/encoding', encoding)
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def selectDirectory(self):
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lastDir = ''
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dirName = QFileDialog.getExistingDirectory(self, self.tr('Select directory'),
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lastDir, QFileDialog.ShowDirsOnly)
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self.leText.setText(dirName)
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def getValue(self):
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fileName = unicode(self.leText.text())
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context = self.expressionContext()
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exp = QgsExpression(fileName)
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if not exp.hasParserError():
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result = exp.evaluate(context)
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if not exp.hasEvalError():
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fileName = result
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if fileName.startswith("[") and fileName.endswith("]"):
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fileName = fileName[1:-1]
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if fileName.strip() in ['', self.SAVE_TO_TEMP_FILE, self.SAVE_TO_TEMP_LAYER]:
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if isinstance(self.output, OutputVector) \
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and self.alg.provider.supportsNonFileBasedOutput():
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# use memory layers for temporary files if supported
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value = 'memory:'
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else:
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value = None
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elif fileName.startswith('memory:'):
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value = fileName
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elif fileName.startswith('postgis:'):
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value = fileName
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elif fileName.startswith('spatialite:'):
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value = fileName
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elif not os.path.isabs(fileName):
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value = ProcessingConfig.getSetting(
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ProcessingConfig.OUTPUT_FOLDER) + os.sep + fileName
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else:
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value = fileName
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return value
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