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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 *
import ftools_utils
from qgis.core import *
from ui_frmPointsInPolygon 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("Count Points in Polygon"))
self.btnOk = self.buttonBox.button( QDialogButtonBox.Ok )
self.btnClose = self.buttonBox.button( QDialogButtonBox.Close )
QObject.connect(self.toolOut, SIGNAL("clicked()"), self.outFile)
self.progressBar.setValue(0)
self.populateLayers()
def populateLayers( self ):
layers = ftools_utils.getLayerNames([QGis.Polygon])
self.inPolygon.clear()
self.inPolygon.addItems(layers)
self.inPoint.clear()
layers = ftools_utils.getLayerNames([QGis.Point])
self.inPoint.addItems(layers)
def outFile(self):
self.outShape.clear()
(self.shapefileName, self.encoding) = ftools_utils.saveDialog(self)
if self.shapefileName is None or self.encoding is None:
return
self.outShape.setText(self.shapefileName)
def accept(self):
if self.inPolygon.currentText() == "":
QMessageBox.information(self, self.tr("Count Points In Polygon"),
self.tr("Please specify input polygon vector layer"))
elif self.inPoint.currentText() == "":
QMessageBox.information(self, self.tr("Count Points In Polygon"),
self.tr("Please specify input point vector layer"))
elif self.lnField.text() == "":
QMessageBox.information(self, self.tr("Count Points In Polygon"),
self.tr("Please specify output count field"))
elif self.outShape.text() == "":
QMessageBox.information(self, self.tr("Count Points In Polygon"),
self.tr("Please specify output shapefile"))
else:
inPoly = ftools_utils.getVectorLayerByName(self.inPolygon.currentText())
inPnts = ftools_utils.getVectorLayerByName(self.inPoint.currentText())
polyProvider = inPoly.dataProvider()
pointProvider = inPnts.dataProvider()
if polyProvider.crs() <> pointProvider.crs():
QMessageBox.warning(self, self.tr("CRS warning!"),
self.tr("Warning: Input layers have non-matching CRS.\nThis may cause unexpected results."))
self.btnOk.setEnabled(False)
self.workThread = PointsInPolygonThread(inPoly, inPnts, self.lnField.text(), self.outShape.text(), self.encoding)
QObject.connect(self.workThread, SIGNAL("rangeChanged(int)"), self.setProgressRange)
QObject.connect(self.workThread, SIGNAL("updateProgress()"), self.updateProgress)
QObject.connect(self.workThread, SIGNAL("processingFinished()"), self.processFinished)
QObject.connect(self.workThread, SIGNAL("processingInterrupted()"), self.processInterrupted)
self.btnClose.setText(self.tr("Cancel"))
QObject.disconnect(self.buttonBox, SIGNAL("rejected()"), self.reject)
QObject.connect(self.btnClose, SIGNAL("clicked()"), self.stopProcessing)
self.workThread.start()
def setProgressRange(self, maxValue):
self.progressBar.setRange(0, maxValue)
self.progressBar.setValue(0)
def updateProgress(self):
self.progressBar.setValue(self.progressBar.value() + 1)
def processFinished(self):
self.stopProcessing()
if self.addToCanvasCheck.isChecked():
addCanvasCheck = ftools_utils.addShapeToCanvas(unicode(self.outShape.text()))
if not addCanvasCheck:
QMessageBox.warning( self, self.tr("Count Points in Polygon"), self.tr( "Error loading output shapefile:\n%s" ) % ( unicode( outPath ) ))
self.populateLayers()
else:
QMessageBox.information(self, self.tr("Count Points in Polygon"),self.tr("Created output shapefile:\n%s" ) % ( unicode( self.outShape.text() )))
self.restoreGui()
def processInterrupted(self):
self.restoreGui()
def stopProcessing(self):
if self.workThread != None:
self.workThread.stop()
self.workThread = None
def restoreGui(self):
self.progressBar.setRange(0, 1)
self.progressBar.setValue(0)
self.outShape.clear()
QObject.disconnect(self.btnClose, SIGNAL("clicked()"), self.stopProcessing)
QObject.connect(self.buttonBox, SIGNAL("rejected()"), self.reject)
self.btnClose.setText(self.tr("Close"))
self.btnOk.setEnabled(True)
class PointsInPolygonThread(QThread):
def __init__( self, inPoly, inPoints, fieldName, outPath, encoding ):
QThread.__init__( self, QThread.currentThread() )
self.mutex = QMutex()
self.stopMe = 0
self.interrupted = False
self.layerPoly = inPoly
self.layerPoints = inPoints
self.fieldName = fieldName
self.outPath = outPath
self.encoding = encoding
def run(self):
self.mutex.lock()
self.stopMe = 0
self.mutex.unlock()
interrupted = False
polyProvider = self.layerPoly.dataProvider()
pointProvider = self.layerPoints.dataProvider()
fieldList = ftools_utils.getFieldList(self.layerPoly)
index = polyProvider.fieldNameIndex(unicode(self.fieldName))
if index == -1:
index = polyProvider.fields().count()
fieldList.append( QgsField(unicode(self.fieldName), QVariant.Int, "int", 10, 0, self.tr("point count field")) )
sRs = polyProvider.crs()
if QFile(self.outPath).exists():
if not QgsVectorFileWriter.deleteShapeFile(self.outPath):
return
writer = QgsVectorFileWriter(self.outPath, self.encoding, fieldList,
polyProvider.geometryType(), sRs)
spatialIndex = ftools_utils.createIndex( pointProvider )
self.emit(SIGNAL("rangeChanged(int)"), polyProvider.featureCount() )
polyFeat = QgsFeature()
pntFeat = QgsFeature()
outFeat = QgsFeature()
inGeom = QgsGeometry()
polyFit = polyProvider.getFeatures()
while polyFit.nextFeature(polyFeat):
inGeom = polyFeat.geometry()
atMap = polyFeat.attributes()
outFeat.setAttributes(atMap)
outFeat.setGeometry(inGeom)
count = 0
pointList = []
hasIntersection = True
pointList = spatialIndex.intersects(inGeom.boundingBox())
if len(pointList) > 0:
hasIntersection = True
else:
hasIntersection = False
if hasIntersection:
for p in pointList:
pointProvider.getFeatures( QgsFeatureRequest().setFilterFid( p ) ).nextFeature( pntFeat )
tmpGeom = QgsGeometry(pntFeat.geometry())
if inGeom.intersects(tmpGeom):
count += 1
self.mutex.lock()
s = self.stopMe
self.mutex.unlock()
if s == 1:
interrupted = True
break
atMap.append(count)
outFeat.setAttributes(atMap)
writer.addFeature(outFeat)
self.emit( SIGNAL( "updateProgress()" ) )
self.mutex.lock()
s = self.stopMe
self.mutex.unlock()
if s == 1:
interrupted = True
break
del writer
if not interrupted:
self.emit( SIGNAL( "processingFinished()" ) )
else:
self.emit( SIGNAL( "processingInterrupted()" ) )
def stop(self):
self.mutex.lock()
self.stopMe = 1
self.mutex.unlock()
QThread.wait( self )
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