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202 lines
8.0 KiB
Python
202 lines
8.0 KiB
Python
# -*- coding: utf-8 -*-
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"""
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/***************************************************************************
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Name : DB Manager
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Description : Database manager plugin for QGIS
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Date : Oct 13, 2011
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copyright : (C) 2011 by Giuseppe Sucameli
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email : brush.tyler@gmail.com
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The content of this file is based on
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- PG_Manager by Martin Dobias (GPLv2 license)
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***************************************************************************/
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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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from builtins import str
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from qgis.PyQt.QtCore import Qt, QFileInfo
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from qgis.PyQt.QtWidgets import QDialog, QFileDialog, QMessageBox, QApplication
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from qgis.PyQt.QtGui import QCursor
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from qgis.core import (QgsVectorFileWriter,
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QgsVectorDataProvider,
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QgsCoordinateReferenceSystem,
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QgsVectorLayerExporter,
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QgsSettings)
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from qgis.utils import OverrideCursor
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from .ui.ui_DlgExportVector import Ui_DbManagerDlgExportVector as Ui_Dialog
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class DlgExportVector(QDialog, Ui_Dialog):
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def __init__(self, inLayer, inDb, parent=None):
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QDialog.__init__(self, parent)
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self.inLayer = inLayer
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self.db = inDb
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self.setupUi(self)
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vectorFilterName = "lastVectorFileFilter" # "lastRasterFileFilter"
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self.lastUsedVectorFilterSettingsKey = u"/UI/{0}".format(vectorFilterName)
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self.lastUsedVectorDirSettingsKey = u"/UI/{0}Dir".format(vectorFilterName)
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# update UI
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self.setupWorkingMode()
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self.populateFileFilters()
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self.populateEncodings()
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def setupWorkingMode(self):
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# set default values
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inCrs = self.inLayer.crs()
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srid = inCrs.postgisSrid() if inCrs.isValid() else 4236
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self.editSourceSrid.setText("%s" % srid)
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self.editTargetSrid.setText("%s" % srid)
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self.btnChooseOutputFile.clicked.connect(self.chooseOutputFile)
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self.checkSupports()
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def checkSupports(self):
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""" update options available for the current input layer """
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allowSpatial = self.db.connector.hasSpatialSupport()
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hasGeomType = self.inLayer and self.inLayer.isSpatial()
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self.chkSourceSrid.setEnabled(allowSpatial and hasGeomType)
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self.chkTargetSrid.setEnabled(allowSpatial and hasGeomType)
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# self.chkSpatialIndex.setEnabled(allowSpatial and hasGeomType)
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def chooseOutputFile(self):
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# get last used dir
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settings = QgsSettings()
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lastUsedDir = settings.value(self.lastUsedVectorDirSettingsKey, ".")
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# get selected filter
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selected_driver = self.cboFileFormat.currentData()
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selected_filter = QgsVectorFileWriter.filterForDriver(selected_driver)
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# ask for a filename
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filename, filter = QFileDialog.getSaveFileName(self, self.tr("Choose where to save the file"), lastUsedDir,
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selected_filter)
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if filename == "":
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return
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ext = selected_filter[selected_filter.find('.'):]
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ext = ext[:ext.find(' ')]
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if not filename.lower().endswith(ext):
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filename += ext
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# store the last used dir
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settings.setValue(self.lastUsedVectorDirSettingsKey, QFileInfo(filename).filePath())
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self.editOutputFile.setText(filename)
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def populateEncodings(self):
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# populate the combo with supported encodings
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self.cboEncoding.addItems(QgsVectorDataProvider.availableEncodings())
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# set the last used encoding
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enc = self.inLayer.dataProvider().encoding()
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idx = self.cboEncoding.findText(enc)
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if idx < 0:
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self.cboEncoding.insertItem(0, enc)
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idx = 0
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self.cboEncoding.setCurrentIndex(idx)
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def populateFileFilters(self):
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# populate the combo with supported vector file formats
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for driver in QgsVectorFileWriter.ogrDriverList():
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self.cboFileFormat.addItem(driver.longName, driver.driverName)
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# set the last used filter
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settings = QgsSettings()
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filt = settings.value(self.lastUsedVectorFilterSettingsKey, "GPKG")
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idx = self.cboFileFormat.findText(filt)
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if idx < 0:
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idx = 0
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self.cboFileFormat.setCurrentIndex(idx)
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def accept(self):
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# sanity checks
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if self.editOutputFile.text() == "":
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QMessageBox.information(self, self.tr("Export to file"), self.tr("Output file name is required"))
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return
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if self.chkSourceSrid.isEnabled() and self.chkSourceSrid.isChecked():
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try:
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sourceSrid = int(self.editSourceSrid.text())
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except ValueError:
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QMessageBox.information(self, self.tr("Export to file"),
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self.tr("Invalid source srid: must be an integer"))
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return
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if self.chkTargetSrid.isEnabled() and self.chkTargetSrid.isChecked():
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try:
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targetSrid = int(self.editTargetSrid.text())
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except ValueError:
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QMessageBox.information(self, self.tr("Export to file"),
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self.tr("Invalid target srid: must be an integer"))
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return
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with OverrideCursor(Qt.WaitCursor):
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# store current input layer crs, so I can restore it later
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prevInCrs = self.inLayer.crs()
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try:
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uri = self.editOutputFile.text()
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providerName = "ogr"
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options = {}
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# set the OGR driver will be used
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driverName = self.cboFileFormat.currentData()
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options['driverName'] = driverName
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# set the output file encoding
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if self.chkEncoding.isEnabled() and self.chkEncoding.isChecked():
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enc = self.cboEncoding.currentText()
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options['fileEncoding'] = enc
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if self.chkDropTable.isChecked():
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options['overwrite'] = True
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outCrs = QgsCoordinateReferenceSystem()
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if self.chkTargetSrid.isEnabled() and self.chkTargetSrid.isChecked():
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targetSrid = int(self.editTargetSrid.text())
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outCrs = QgsCoordinateReferenceSystem(targetSrid)
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# update input layer crs
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if self.chkSourceSrid.isEnabled() and self.chkSourceSrid.isChecked():
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sourceSrid = int(self.editSourceSrid.text())
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inCrs = QgsCoordinateReferenceSystem(sourceSrid)
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self.inLayer.setCrs(inCrs)
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# do the export!
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ret, errMsg = QgsVectorLayerExporter.exportLayer(self.inLayer, uri, providerName, outCrs,
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False, options)
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except Exception as e:
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ret = -1
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errMsg = str(e)
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finally:
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# restore input layer crs and encoding
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self.inLayer.setCrs(prevInCrs)
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if ret != 0:
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QMessageBox.warning(self, self.tr("Export to file"), self.tr("Error {0}\n{1}").format(ret, errMsg))
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return
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# create spatial index
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# if self.chkSpatialIndex.isEnabled() and self.chkSpatialIndex.isChecked():
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# self.db.connector.createSpatialIndex( (schema, table), geom )
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QMessageBox.information(self, self.tr("Export to file"), self.tr("Export finished."))
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return QDialog.accept(self)
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