# -*- coding: utf-8 -*-
#-----------------------------------------------------------
#
# fTools
# Copyright (C) 2008-2011 Carson Farmer
# EMAIL: carson.farmer (at) gmail.com
# WEB : http://www.ftools.ca/fTools.html
#
# A collection of data management and analysis tools for vector data
#
#-----------------------------------------------------------
#
# licensed under the terms of GNU GPL 2
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#---------------------------------------------------------------------
import re
from PyQt4.QtCore import QObject, SIGNAL, QIODevice, QFile, QTextStream
from PyQt4.QtGui import QDialog, QDialogButtonBox, QMessageBox
from qgis.core import QGis, QgsCoordinateReferenceSystem
from qgis.gui import QgsGenericProjectionSelector
import ftools_utils
from ui_frmReProject import Ui_Dialog
class Dialog(QDialog, Ui_Dialog):
def __init__(self, iface):
QDialog.__init__(self, iface.mainWindow())
self.iface = iface
self.setupUi(self)
self.toolOut.setEnabled(False)
self.toolOut.setVisible(False)
self.outShape.setEnabled(False)
self.outShape.setVisible(False)
self.label_2.setVisible(False)
self.label_2.setEnabled(False)
self.setWindowTitle(self.tr("Define current projection"))
self.buttonOk = self.buttonBox_2.button( QDialogButtonBox.Ok )
QObject.connect(self.btnProjection, SIGNAL("clicked()"), self.outProjFile)
QObject.connect(self.inShape, SIGNAL("currentIndexChanged(QString)"), self.updateProj1)
QObject.connect(self.cmbLayer, SIGNAL("currentIndexChanged(QString)"), self.updateProj2)
# populate layer list
self.progressBar.setValue(0)
layers = ftools_utils.getLayerNames([QGis.Point, QGis.Line, QGis.Polygon])
self.inShape.addItems(layers)
self.cmbLayer.addItems(layers)
self.crs = None
def updateProj1(self, layerName):
self.inRef.clear()
tempLayer = ftools_utils.getVectorLayerByName(layerName)
crs = tempLayer.dataProvider().crs()
if crs.isValid():
self.inRef.insert(crs.authid() + " - " + crs.description())
else:
self.inRef.insert( self.tr( "Missing or invalid CRS" ) )
def updateProj2(self, layerName):
self.outRef.clear()
tempLayer = ftools_utils.getVectorLayerByName(layerName)
crs = tempLayer.dataProvider().crs()
if crs.isValid():
self.outRef.insert(crs.authid() + " - " + crs.description())
else:
self.outRef.insert( self.tr( "Missing or invalid CRS" ) )
def accept(self):
self.buttonOk.setEnabled( False )
if self.inShape.currentText() == "":
QMessageBox.information(self, self.tr("Define current projection"), self.tr("No input shapefile specified"))
elif self.txtProjection.text() == "" and self.rdoProjection.isChecked():
QMessageBox.information(self, self.tr("Define current projection"), self.tr("Please specify spatial reference system"))
elif self.cmbLayer.currentText() == "" and self.rdoLayer.isChecked():
QMessageBox.information(self, self.tr("Define current projection"), self.tr("Please specify spatial reference system"))
else:
self.progressBar.setValue(5)
inName = self.inShape.currentText()
self.progressBar.setValue(10)
vLayer = ftools_utils.getVectorLayerByName(inName)
self.progressBar.setValue(30)
if vLayer == "Error":
QMessageBox.information(self, self.tr("Define current projection"), self.tr("Cannot define projection for PostGIS data...yet!"))
else:
srsDefine = None
if self.rdoProjection.isChecked():
srsDefine = self.crs
else:
destLayer = ftools_utils.getVectorLayerByName(self.cmbLayer.currentText())
srsDefine = destLayer.crs()
if srsDefine == vLayer.crs():
responce = QMessageBox.question(self, self.tr("Define current projection"),
self.tr("Identical output spatial reference system chosen\n\nAre you sure you want to proceed?"),
QMessageBox.Yes, QMessageBox.No, QMessageBox.NoButton)
if responce == QMessageBox.No:
self.progressBar.setValue(0)
self.buttonOk.setEnabled( True )
return
provider = vLayer.dataProvider()
self.progressBar.setValue(35)
inPath = provider.dataSourceUri()
p = re.compile("\|.*")
inPath = p.sub("", inPath)
self.progressBar.setValue(40)
if inPath.endswith(".shp"):
inPath = inPath[:-4]
self.progressBar.setValue(55)
if not srsDefine.isValid():
QMessageBox.information(self, self.tr("Define current projection"), self.tr("Output spatial reference system is not valid"))
else:
self.progressBar.setValue(60)
outputWkt = srsDefine.toWkt()
self.progressBar.setValue(65)
outputFile = QFile( inPath + ".prj" )
outputFile.open( QIODevice.WriteOnly | QIODevice.Text )
outputPrj = QTextStream( outputFile )
outputPrj << outputWkt
outputPrj.flush()
outputFile.close()
self.progressBar.setValue(70)
checkFile = QFile( inPath + ".qpj" )
if checkFile.exists():
checkFile.open( QIODevice.WriteOnly | QIODevice.Text )
outputPrj = QTextStream( checkFile )
outputPrj << outputWkt
outputPrj.flush()
checkFile.close()
self.progressBar.setValue(95)
vLayer.setCrs(srsDefine)
self.progressBar.setValue(100)
QMessageBox.information(self, self.tr("Define current projection"),
self.tr("Defined Projection For:\n%s.shp") % (inPath) )
self.progressBar.setValue(0)
self.buttonOk.setEnabled( True )
def outProjFile(self):
header = "Define layer CRS:"
sentence1 = self.tr( "Please select the projection system that defines the current layer." )
sentence2 = self.tr( "Layer CRS information will be updated to the selected CRS." )
projSelector = QgsGenericProjectionSelector(self)
projSelector.setMessage( "%s
%s
%s" % (header, sentence1, sentence2) )
if projSelector.exec_():
self.crs = QgsCoordinateReferenceSystem( projSelector.selectedCrsId(), QgsCoordinateReferenceSystem.InternalCrsId )
print "AUTHID", projSelector.selectedAuthId()
if len(projSelector.selectedAuthId()) == 0:
QMessageBox.information(self, self.tr("Export to new projection"), self.tr("No Valid CRS selected"))
return
else:
self.txtProjection.clear()
self.txtProjection.insert(self.crs.authid() + " - " + self.crs.description())
else:
return