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VTMLoadData.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
VeniceTimeMachine
A QGIS plugin
VeniceTimeMachine
-------------------
begin : 2014-03-13
copyright : (C) 2014 by Olivier Dalang
email : [email protected]
***************************************************************************/
"""
# Import the PyQt and QGIS libraries
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtXml import *
from PyQt4.QtWebKit import *
from PyQt4 import uic
from qgis.core import *
from qgis.gui import *
import os.path
class VTMLoadData(QDialog):
PROPERTY_COLUMN = 0
DATE_COLUMN = 1
INTERP_COLUMN = 2
VALUE_COLUMN = 3
DATE_START_IF_UNKNOWN_COLUMN = 4
DATE_END_IF_UNKNOWN_COLUMN = 5
def __init__(self, iface, main):
self.iface = iface
self.main = main
QDialog.__init__(self)
uic.loadUi(os.path.dirname(__file__)+'/ui/loaddata.ui', self)
self.layer = self.iface.activeLayer()
crs = self.iface.activeLayer().crs().authid()
# Update the GUI fields
self.layerNameLabel.setText( self.layer.name() )
self.entityNameLineEdit.setText( '\'{layername} #\' || $id'.format(layername=self.layer.name()) )
self.sourceLineEdit.setText( self.layer.name() )
for f in self.main.entitiesTypeLayer.getFeatures():
self.entityTypeComboBox.addItem( f.attribute('name'), f.id() )
for f in self.main.sourcesLayer.getFeatures():
self.sourceComboBox.addItem( f.attribute('name'), f.id() )
for f in self.main.propertiesTypeLayer.getFeatures():
self.addAttributeTypeComboBox.addItem( f.attribute('name'), f.id() )
if self.layer.hasGeometryType():
propItem = QTableWidgetItem('geom')
dateItem = QTableWidgetItem( str(self.main.currentDate()) )
interpItem = QTableWidgetItem( '\'default\'' )
valItem = QTableWidgetItem('geomToWKT( transform($geometry,\'{0}\',\'EPSG:4326\') )'.format(crs))
startDateItem = QTableWidgetItem( str(self.main.currentDate()-100) )
endDateItem = QTableWidgetItem( str(self.main.currentDate()+100) )
self.attributesTableWidget.insertRow(0)
self.attributesTableWidget.setItem(0,self.PROPERTY_COLUMN,propItem)
self.attributesTableWidget.setItem(0,self.DATE_COLUMN,dateItem)
self.attributesTableWidget.setItem(0,self.INTERP_COLUMN,interpItem)
self.attributesTableWidget.setItem(0,self.VALUE_COLUMN,valItem)
self.attributesTableWidget.setItem(0,self.DATE_START_IF_UNKNOWN_COLUMN,startDateItem)
self.attributesTableWidget.setItem(0,self.DATE_END_IF_UNKNOWN_COLUMN,endDateItem)
if self.layer.selectedFeatureCount():
self.selectionOnlyCheckBox.setCheckState(Qt.Checked)
self.updateFeatureCountLabel()
# Connect the signals
self.attributesTableWidget.currentCellChanged.connect(self.currentCellChanged)
self.entityExpressionButton.pressed.connect(self.buildEntityExpression)
self.attributeExpressionButton.pressed.connect(self.buildAttributeExpression)
self.addAttributeButton.pressed.connect(self.addProperty)
self.removeAttributeButton.pressed.connect(self.removeProperty)
self.accepted.connect( self.process )
self.selectionOnlyCheckBox.stateChanged.connect( self.updateFeatureCountLabel )
def buildEntityExpression(self):
dialog = QgsExpressionBuilderDialog(self.layer, self.entityNameLineEdit.text())
if dialog.exec_():
self.entityNameLineEdit.setText( dialog.expressionText() )
def buildAttributeExpression(self):
dialog = QgsExpressionBuilderDialog(self.layer, self.attributesTableWidget.currentItem().text())
if dialog.exec_():
self.attributesTableWidget.currentItem().setText( dialog.expressionText() )
def addProperty(self):
propItem = QTableWidgetItem( self.addAttributeTypeComboBox.currentText() )
dateItem = QTableWidgetItem( str(self.main.currentDate()) )
interpItem = QTableWidgetItem( '\'default\'' )
valItem = QTableWidgetItem( 'value' )
startDateItem = QTableWidgetItem( str(self.main.currentDate()-100) )
endDateItem = QTableWidgetItem( str(self.main.currentDate()+100) )
self.attributesTableWidget.insertRow(self.attributesTableWidget.rowCount())
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.PROPERTY_COLUMN,propItem)
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.DATE_COLUMN,dateItem)
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.INTERP_COLUMN,interpItem)
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.VALUE_COLUMN,valItem)
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.DATE_START_IF_UNKNOWN_COLUMN,startDateItem)
self.attributesTableWidget.setItem(self.attributesTableWidget.rowCount()-1,self.DATE_END_IF_UNKNOWN_COLUMN,endDateItem)
def removeProperty(self):
self.attributesTableWidget.removeRow( self.addAttributeTypeComboBox.currentIndex() )
def currentCellChanged(self, currentRow, currentColumn, previousRow, previousColumn):
if currentColumn in [self.DATE_COLUMN, self.INTERP_COLUMN, self.VALUE_COLUMN, self.DATE_START_IF_UNKNOWN_COLUMN, self.DATE_END_IF_UNKNOWN_COLUMN]:
self.attributeExpressionButton.setEnabled(True)
else:
self.attributeExpressionButton.setEnabled(False)
def getCount(self):
if self.selectionOnlyCheckBox.isChecked():
return self.layer.selectedFeatureCount()
else:
return self.layer.featureCount()
def updateFeatureCountLabel(self):
self.featureCountLabel.setText( 'You are going to load {0} features'.format( self.getCount() ) )
def process(self):
# Here we do the actual loading
progress = QProgressDialog("Importing features...", "Abort", 0, self.getCount(), self)
progress.setWindowModality(Qt.WindowModal)
progress.raise_()
featureIterator = None
if self.selectionOnlyCheckBox.isChecked():
featureIterator = self.layer.selectedFeaturesIterator()
else:
featureIterator = self.layer.getFeatures()
connection = self.main.getConnection()
cursor = connection.cursor()
entityFields = self.main.entitiesLayer.pendingFields()
i=0
for f in featureIterator:
i+=1
progress.setValue(i)
if progress.wasCanceled():
break
QgsMessageLog.logMessage( 'importing feature {0}'.format( f.id() ),'VTM Slider' )
expName = QgsExpression( self.entityNameLineEdit.text() )
expName.prepare( entityFields )
ent_name = expName.evaluate( f )
ent_type = self.entityTypeComboBox.itemText( self.entityTypeComboBox.currentIndex() ) if self.entityExistingRadioButton.isChecked() else self.entityTypeLineEdit.text()
source_name = self.sourceComboBox.itemText( self.sourceComboBox.currentIndex() ) if self.sourceExistingRadioButton.isChecked() else self.sourceLineEdit.text()
# 2. Creation of the properties
for row in range(0, self.attributesTableWidget.rowCount()):
valueExpVal = QgsExpression( self.attributesTableWidget.item(row, self.VALUE_COLUMN).text() )
valueExpVal.prepare( entityFields )
value = valueExpVal.evaluate( f )
if isinstance(value,QPyNullVariant): value = None
dateExpVal = QgsExpression( self.attributesTableWidget.item(row, self.DATE_COLUMN).text() )
dateExpVal.prepare( entityFields )
date = dateExpVal.evaluate( f )
if isinstance(date,QPyNullVariant): date = None
interpExpVal = QgsExpression( self.attributesTableWidget.item(row, self.INTERP_COLUMN).text() )
interpExpVal.prepare( entityFields )
interp = interpExpVal.evaluate( f )
if isinstance(interp,QPyNullVariant): interp = None
startExpVal = QgsExpression( self.attributesTableWidget.item(row, self.DATE_START_IF_UNKNOWN_COLUMN).text() )
startExpVal.prepare( entityFields )
start = startExpVal.evaluate( f )
if isinstance(start,QPyNullVariant): start = None
endExpVal = QgsExpression( self.attributesTableWidget.item(row, self.DATE_END_IF_UNKNOWN_COLUMN).text() )
endExpVal.prepare( entityFields )
end = endExpVal.evaluate( f )
if isinstance(end,QPyNullVariant): end = None
prop_name = self.attributesTableWidget.item(row, self.PROPERTY_COLUMN).text()
sql = 'SELECT vtm.insert_properties_helper(%(ent_name)s, %(ent_type)s, %(source_name)s, %(prop_name)s, %(date)s, %(interp)s, %(value)s, %(start)s, %(end)s);'
cursor.execute(sql, {'ent_name': ent_name, 'ent_type':ent_type, 'source_name':source_name, 'prop_name': prop_name,'value': value,'date': date,'interp': interp,'start': start,'end': end })
QgsMessageLog.logMessage( 'attribute create created : '+str(cursor.fetchone()), 'VTM Slider')
connection.commit()
cursor.close()