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# -*- 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.
#
#---------------------------------------------------------------------
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
import ftools_utils
from ui_frmVectorSplit import Ui_Dialog
class Dialog(QDialog, Ui_Dialog):
def __init__(self, iface):
QDialog.__init__(self, iface.mainWindow())
self.iface = iface
self.setupUi(self)
self.setWindowTitle(self.tr("Split vector layer"))
QObject.connect(self.toolOut, SIGNAL("clicked()"), self.outFile)
QObject.connect(self.inShape, SIGNAL("currentIndexChanged(QString)"), self.update)
self.workThread = None
self.btnOk = self.buttonBox_2.button( QDialogButtonBox.Ok )
self.btnClose = self.buttonBox_2.button( QDialogButtonBox.Close )
# populate layer list
mapCanvas = self.iface.mapCanvas()
layers = ftools_utils.getLayerNames([QGis.Point, QGis.Line, QGis.Polygon])
self.inShape.addItems(layers)
def update(self, inputLayer):
self.inField.clear()
changedLayer = ftools_utils.getVectorLayerByName(inputLayer)
changedField = ftools_utils.getFieldList(changedLayer)
for f in changedField:
self.inField.addItem(unicode(f.name()))
def outFile(self):
self.outShape.clear()
( self.folderName, self.encoding ) = ftools_utils.dirDialog( self )
if self.folderName is None or self.encoding is None:
return
self.outShape.setText( self.folderName )
def accept(self):
inShape = self.inShape.currentText()
outDir = self.outShape.text()
if inShape == "":
QMessageBox.information(self, self.tr("Vector Split"),
self.tr("No input shapefile specified"))
return
elif outDir == "":
QMessageBox.information(self, self.tr("Vector Split"),
self.tr("Please specify output shapefile"))
return
self.btnOk.setEnabled( False )
vLayer = ftools_utils.getVectorLayerByName(unicode(self.inShape.currentText()))
self.workThread = SplitThread(vLayer, self.inField.currentText(), self.encoding, outDir)
QObject.connect(self.workThread, SIGNAL("rangeCalculated(PyQt_PyObject)"), self.setProgressRange)
QObject.connect(self.workThread, SIGNAL("valueProcessed()"), self.valueProcessed)
QObject.connect(self.workThread, SIGNAL("processFinished(PyQt_PyObject)"), self.processFinished)
QObject.connect(self.workThread, SIGNAL("processInterrupted()"), self.processInterrupted)
self.btnClose.setText(self.tr("Cancel"))
QObject.disconnect(self.buttonBox_2, SIGNAL("rejected()"), self.reject)
QObject.connect(self.btnClose, SIGNAL("clicked()"), self.stopProcessing)
self.workThread.start()
def setProgressRange(self, maximum):
self.progressBar.setRange(0, maximum)
def valueProcessed(self):
self.progressBar.setValue(self.progressBar.value() + 1)
def restoreGui(self):
self.progressBar.setValue(0)
self.outShape.clear()
QObject.connect(self.buttonBox_2, SIGNAL("rejected()"), self.reject)
self.btnClose.setText(self.tr("Close"))
self.btnOk.setEnabled(True)
def stopProcessing(self):
if self.workThread != None:
self.workThread.stop()
self.workThread = None
def processInterrupted( self ):
self.restoreGui()
def processFinished(self, errors):
self.stopProcessing()
outPath = self.outShape.text()
self.restoreGui()
if errors:
msg = self.tr( "Processing of the following layers/files ended with error:<br><br>" ) + "<br>".join(errors)
QErrorMessage( self ).showMessage( msg )
QMessageBox.information(self, self.tr("Vector Split"),
self.tr("Created output shapefiles in folder:\n%s") % (outPath))
class SplitThread(QThread):
def __init__(self, layer, splitField, encoding, outDir):
QThread.__init__(self, QThread.currentThread())
self.layer = layer
self.field = splitField
self.encoding = encoding
self.outDir = outDir
self.mutex = QMutex()
self.stopMe = 0
self.errors = []
def run(self):
self.mutex.lock()
self.stopMe = 0
self.mutex.unlock()
interrupted = False
outPath = self.outDir
if outPath.find("\\") != -1:
outPath.replace("\\", "/")
if not outPath.endswith("/"):
outPath = outPath + "/"
provider = self.layer.dataProvider()
index = provider.fieldNameIndex(self.field)
unique = ftools_utils.getUniqueValues(provider, int(index))
baseName = unicode( outPath + self.layer.name() + "_" + self.field + "_" )
fieldList = ftools_utils.getFieldList(self.layer)
sRs = provider.crs()
geom = self.layer.wkbType()
inFeat = QgsFeature()
self.emit(SIGNAL("rangeCalculated(PyQt_PyObject)"), len(unique))
for i in unique:
check = QFile(baseName + "_" + unicode(i).strip() + ".shp")
fName = check.fileName()
if check.exists():
if not QgsVectorFileWriter.deleteShapeFile(fName):
self.errors.append( fName )
continue
writer = QgsVectorFileWriter(fName, self.encoding, fieldList, geom, sRs)
fit = provider.getFeatures()
while fit.nextFeature(inFeat):
atMap = inFeat.attributes()
if atMap[index] == i:
writer.addFeature(inFeat)
del writer
self.emit(SIGNAL("valueProcessed()"))
self.mutex.lock()
s = self.stopMe
self.mutex.unlock()
if s == 1:
interrupted = True
break
if not interrupted:
self.emit(SIGNAL("processFinished( PyQt_PyObject )"), self.errors)
else:
self.emit(SIGNAL("processInterrupted()"))
def stop(self):
self.mutex.lock()
self.stopMe = 1
self.mutex.unlock()
QThread.wait(self)
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