# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager
Description : Database manager plugin for QGIS
Date : May 23, 2011
copyright : (C) 2011 by Giuseppe Sucameli
email : brush.tyler@gmail.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. *
* *
***************************************************************************/
"""
from builtins import str
# this will disable the dbplugin if the connector raise an ImportError
from .connector import GPKGDBConnector
from qgis.PyQt.QtCore import Qt, QFileInfo
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtWidgets import QApplication, QAction, QFileDialog
from qgis.core import QgsDataSourceUri, QgsSettings
from qgis.gui import QgsMessageBar
from ..plugin import DBPlugin, Database, Table, VectorTable, RasterTable, TableField, TableIndex, TableTrigger, \
InvalidDataException
from . import resources_rc
hasattr(resources_rc, 'foo')
def classFactory():
return GPKGDBPlugin
class GPKGDBPlugin(DBPlugin):
@classmethod
def icon(self):
return QIcon(":/db_manager/gpkg/icon")
@classmethod
def typeName(self):
return 'gpkg'
@classmethod
def typeNameString(self):
return 'GeoPackage'
@classmethod
def providerName(self):
return 'ogr'
@classmethod
def connectionSettingsKey(self):
return 'providers/ogr/GPKG/connections'
def databasesFactory(self, connection, uri):
return GPKGDatabase(connection, uri)
def connect(self, parent=None):
conn_name = self.connectionName()
settings = QgsSettings()
settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
if not settings.contains("path"): # non-existent entry?
raise InvalidDataException(self.tr(u'There is no defined database connection "{0}".').format(conn_name))
database = settings.value("path")
uri = QgsDataSourceUri()
uri.setDatabase(database)
return self.connectToUri(uri)
@classmethod
def addConnection(self, conn_name, uri):
settings = QgsSettings()
settings.beginGroup(u"/%s/%s" % (self.connectionSettingsKey(), conn_name))
settings.setValue("path", uri.database())
return True
@classmethod
def addConnectionActionSlot(self, item, action, parent, index):
QApplication.restoreOverrideCursor()
try:
filename, selected_filter = QFileDialog.getOpenFileName(parent,
parent.tr("Choose GeoPackage file"), None, "GeoPackage (*.gpkg)")
if not filename:
return
finally:
QApplication.setOverrideCursor(Qt.WaitCursor)
conn_name = QFileInfo(filename).fileName()
uri = QgsDataSourceUri()
uri.setDatabase(filename)
self.addConnection(conn_name, uri)
index.internalPointer().itemChanged()
class GPKGDatabase(Database):
def __init__(self, connection, uri):
Database.__init__(self, connection, uri)
def connectorsFactory(self, uri):
return GPKGDBConnector(uri)
def dataTablesFactory(self, row, db, schema=None):
return GPKGTable(row, db, schema)
def vectorTablesFactory(self, row, db, schema=None):
return GPKGVectorTable(row, db, schema)
def rasterTablesFactory(self, row, db, schema=None):
return GPKGRasterTable(row, db, schema)
def info(self):
from .info_model import GPKGDatabaseInfo
return GPKGDatabaseInfo(self)
def sqlResultModel(self, sql, parent):
from .data_model import GPKGSqlResultModel
return GPKGSqlResultModel(self, sql, parent)
def registerDatabaseActions(self, mainWindow):
action = QAction(self.tr("Run &Vacuum"), self)
mainWindow.registerAction(action, self.tr("&Database"), self.runVacuumActionSlot)
Database.registerDatabaseActions(self, mainWindow)
def runVacuumActionSlot(self, item, action, parent):
QApplication.restoreOverrideCursor()
try:
if not isinstance(item, (DBPlugin, Table)) or item.database() is None:
parent.infoBar.pushMessage(self.tr("No database selected or you are not connected to it."),
QgsMessageBar.INFO, parent.iface.messageTimeout())
return
finally:
QApplication.setOverrideCursor(Qt.WaitCursor)
self.runVacuum()
def runVacuum(self):
self.database().aboutToChange.emit()
self.database().connector.runVacuum()
self.database().refresh()
def runAction(self, action):
action = str(action)
if action.startswith("vacuum/"):
if action == "vacuum/run":
self.runVacuum()
return True
return Database.runAction(self, action)
def uniqueIdFunction(self):
return None
def toSqlLayer(self, sql, geomCol, uniqueCol, layerName="QueryLayer", layerType=None, avoidSelectById=False, filter=""):
from qgis.core import QgsVectorLayer
vl = QgsVectorLayer(self.uri().database(), layerName, 'ogr')
vl.setSubsetString(sql)
return vl
class GPKGTable(Table):
def __init__(self, row, db, schema=None):
Table.__init__(self, db, None)
self.name, self.isView, self.isSysTable = row
def ogrUri(self):
ogrUri = u"%s|layername=%s" % (self.uri().database(), self.name)
return ogrUri
def mimeUri(self):
# QGIS has no provider to load Geopackage vectors, let's use OGR
return u"vector:ogr:%s:%s" % (self.name, self.ogrUri())
def toMapLayer(self):
from qgis.core import QgsVectorLayer
provider = "ogr"
uri = self.ogrUri()
return QgsVectorLayer(uri, self.name, provider)
def tableFieldsFactory(self, row, table):
return GPKGTableField(row, table)
def tableIndexesFactory(self, row, table):
return GPKGTableIndex(row, table)
def tableTriggersFactory(self, row, table):
return GPKGTableTrigger(row, table)
def tableDataModel(self, parent):
from .data_model import GPKGTableDataModel
return GPKGTableDataModel(self, parent)
class GPKGVectorTable(GPKGTable, VectorTable):
def __init__(self, row, db, schema=None):
GPKGTable.__init__(self, row[:-5], db, schema)
VectorTable.__init__(self, db, schema)
# GPKG does case-insensitive checks for table names, but the
# GPKG provider didn't do the same in Qgis < 1.9, so self.geomTableName
# stores the table name like stored in the geometry_columns table
self.geomTableName, self.geomColumn, self.geomType, self.geomDim, self.srid = row[-5:]
self.extent = self.database().connector.getTableExtent((self.schemaName(), self.name), self.geomColumn, force=False)
def uri(self):
uri = self.database().uri()
uri.setDataSource('', self.geomTableName, self.geomColumn)
return uri
def hasSpatialIndex(self, geom_column=None):
geom_column = geom_column if geom_column is not None else self.geomColumn
return self.database().connector.hasSpatialIndex((self.schemaName(), self.name), geom_column)
def createSpatialIndex(self, geom_column=None):
self.aboutToChange.emit()
ret = VectorTable.createSpatialIndex(self, geom_column)
if ret is not False:
self.database().refresh()
return ret
def deleteSpatialIndex(self, geom_column=None):
self.aboutToChange.emit()
ret = VectorTable.deleteSpatialIndex(self, geom_column)
if ret is not False:
self.database().refresh()
return ret
def refreshTableEstimatedExtent(self):
return
def refreshTableExtent(self):
prevExtent = self.extent
self.extent = self.database().connector.getTableExtent((self.schemaName(), self.name), self.geomColumn, force=True)
if self.extent != prevExtent:
self.refresh()
def runAction(self, action):
if GPKGTable.runAction(self, action):
return True
return VectorTable.runAction(self, action)
class GPKGRasterTable(GPKGTable, RasterTable):
def __init__(self, row, db, schema=None):
GPKGTable.__init__(self, row[:-3], db, schema)
RasterTable.__init__(self, db, schema)
self.prefixName, self.geomColumn, self.srid = row[-3:]
self.geomType = 'RASTER'
self.extent = self.database().connector.getTableExtent((self.schemaName(), self.name), self.geomColumn)
def gpkgGdalUri(self):
gdalUri = u'GPKG:%s:%s' % (self.uri().database(), self.prefixName)
return gdalUri
def mimeUri(self):
# QGIS has no provider to load rasters, let's use GDAL
uri = u"raster:gdal:%s:%s" % (self.name, self.uri().database())
return uri
def toMapLayer(self):
from qgis.core import QgsRasterLayer, QgsContrastEnhancement
# QGIS has no provider to load rasters, let's use GDAL
uri = self.gpkgGdalUri()
rl = QgsRasterLayer(uri, self.name)
if rl.isValid():
rl.setContrastEnhancement(QgsContrastEnhancement.StretchToMinimumMaximum)
return rl
class GPKGTableField(TableField):
def __init__(self, row, table):
TableField.__init__(self, table)
self.num, self.name, self.dataType, self.notNull, self.default, self.primaryKey = row
self.hasDefault = self.default
class GPKGTableIndex(TableIndex):
def __init__(self, row, table):
TableIndex.__init__(self, table)
self.num, self.name, self.isUnique, self.columns = row
class GPKGTableTrigger(TableTrigger):
def __init__(self, row, table):
TableTrigger.__init__(self, table)
self.name, self.function = row