# -*- 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