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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_frmIntersectLines import Ui_Dialog
class Dialog(QDialog, Ui_Dialog):
def __init__(self, iface):
QDialog.__init__(self, iface.mainWindow())
self.iface = iface
# Set up the user interface from Designer.
self.setupUi(self)
QObject.connect(self.toolOut, SIGNAL("clicked()"), self.outFile)
QObject.connect(self.inLine1, SIGNAL("currentIndexChanged(QString)"), self.update1)
QObject.connect(self.inLine2, SIGNAL("currentIndexChanged(QString)"), self.update2)
self.setWindowTitle( self.tr("Line intersections") )
self.buttonOk = self.buttonBox_2.button( QDialogButtonBox.Ok )
self.progressBar.setValue(0)
self.populateLayers()
def populateLayers( self ):
layers = ftools_utils.getLayerNames([QGis.Line])
self.inLine1.blockSignals( True )
self.inLine2.blockSignals( True )
self.inLine1.clear()
self.inLine2.clear()
self.inLine1.blockSignals( False )
self.inLine2.blockSignals( False )
self.inLine1.addItems(layers)
self.inLine2.addItems(layers)
def update1(self, inputLayer):
self.inField1.clear()
changedLayer = ftools_utils.getVectorLayerByName(unicode(inputLayer))
changedField = ftools_utils.getFieldList(changedLayer)
for f in changedField:
self.inField1.addItem(unicode(f.name()))
def update2(self, inputLayer):
self.inField2.clear()
changedLayer = ftools_utils.getVectorLayerByName(unicode(inputLayer))
changedField = ftools_utils.getFieldList(changedLayer)
for f in changedField:
self.inField2.addItem(unicode(f.name()))
def accept(self):
self.buttonOk.setEnabled( False )
if self.inLine1.currentText() == "":
QMessageBox.information(self, self.tr("Locate Line Intersections"), self.tr("Please specify input line layer") )
elif self.outShape.text() == "":
QMessageBox.information(self, self.tr("Locate Line Intersections"), self.tr("Please specify output shapefile") )
elif self.inLine2.currentText() == "":
QMessageBox.information(self, self.tr("Locate Line Intersections"), self.tr("Please specify line intersect layer") )
elif self.inField1.currentText() == "":
QMessageBox.information(self, self.tr("Locate Line Intersections"), self.tr("Please specify input unique ID field") )
elif self.inField2.currentText() == "":
QMessageBox.information(self, self.tr("Locate Line Intersections"), self.tr("Please specify intersect unique ID field") )
else:
line1 = self.inLine1.currentText()
line2 = self.inLine2.currentText()
field1 = self.inField1.currentText()
field2 = self.inField2.currentText()
outPath = self.outShape.text()
self.outShape.clear()
self.compute(line1, line2, field1, field2, outPath, self.progressBar)
self.progressBar.setValue(100)
if self.addToCanvasCheck.isChecked():
addCanvasCheck = ftools_utils.addShapeToCanvas(unicode(outPath))
if not addCanvasCheck:
QMessageBox.warning( self, self.tr("Geoprocessing"), self.tr( "Error loading output shapefile:\n%s" ) % ( unicode( outPath ) ))
self.populateLayers()
else:
QMessageBox.information(self, self.tr("Generate Centroids"),self.tr("Created output shapefile:\n%s" ) % ( unicode( outPath )))
self.progressBar.setValue(0)
self.buttonOk.setEnabled( True )
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 compute(self, line1, line2, field1, field2, outPath, progressBar):
layer1 = ftools_utils.getVectorLayerByName(line1)
provider1 = layer1.dataProvider()
fieldList = ftools_utils.getFieldList(layer1)
index1 = provider1.fieldNameIndex(field1)
field1 = fieldList[index1]
field1.setName(unicode(field1.name()) + "_1")
layer2 = ftools_utils.getVectorLayerByName(line2)
provider2 = layer2.dataProvider()
fieldList = ftools_utils.getFieldList(layer2)
index2 = provider2.fieldNameIndex(field2)
field2 = fieldList[index2]
field2.setName(unicode(field2.name()) + "_2")
fieldList = QgsFields()
fieldList.append( field1 )
fieldList.append( field2 )
sRs = provider1.crs()
check = QFile(self.shapefileName)
if check.exists():
if not QgsVectorFileWriter.deleteShapeFile(self.shapefileName):
return
writer = QgsVectorFileWriter(self.shapefileName, self.encoding, fieldList, QGis.WKBPoint, sRs)
inFeat = QgsFeature()
inFeatB = QgsFeature()
outFeat = QgsFeature()
outFields = QgsFields()
outFields.append(field1)
outFields.append(field2)
outFeat.setFields(outFields)
start = 15.00
add = 85.00 / layer1.featureCount()
index = ftools_utils.createIndex( provider2 )
singlelayer_tempList = []
fit1 = provider1.getFeatures( QgsFeatureRequest().setSubsetOfAttributes([index1]) )
while fit1.nextFeature(inFeat):
inGeom = inFeat.geometry()
v1 = inFeat.attributes()[index1]
lineList = index.intersects( inGeom.boundingBox() )
for i in lineList:
provider2.getFeatures( QgsFeatureRequest().setFilterFid( int( i ) ).setSubsetOfAttributes([index2]) ).nextFeature( inFeatB )
tmpGeom = QgsGeometry( inFeatB.geometry() )
v2 = inFeatB.attributes()[index2]
if inGeom.intersects(tmpGeom):
tempGeom = inGeom.intersection(tmpGeom)
if tempGeom.type() == QGis.Point:
tempList = []
if tempGeom.isMultipart():
tempList = tempGeom.asMultiPoint()
else:
tempList.append(tempGeom.asPoint())
for j in tempList:
# if same layer, avoid insert duplicated points
if line1 == line2:
if not j in singlelayer_tempList:
singlelayer_tempList.append(j)
outFeat.setGeometry(tempGeom.fromPoint(j))
outFeat.setAttribute(0, v1)
outFeat.setAttribute(1, v2)
writer.addFeature(outFeat)
else:
outFeat.setGeometry(tempGeom.fromPoint(j))
outFeat.setAttribute(0, v1)
outFeat.setAttribute(1, v2)
writer.addFeature(outFeat)
start = start + add
progressBar.setValue(start)
del writer
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