mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-26 00:02:08 -05:00
68 lines
2.5 KiB
Python
68 lines
2.5 KiB
Python
from sextante.core.GeoAlgorithm import GeoAlgorithm
|
|
import os.path
|
|
from PyQt4 import QtGui
|
|
from PyQt4.QtCore import *
|
|
from PyQt4.QtGui import *
|
|
from qgis.core import *
|
|
from sextante.parameters.ParameterVector import ParameterVector
|
|
from sextante.core.QGisLayers import QGisLayers
|
|
from sextante.outputs.OutputVector import OutputVector
|
|
|
|
class LinesToPolygons(GeoAlgorithm):
|
|
|
|
INPUT = "INPUT"
|
|
OUTPUT = "OUTPUT"
|
|
|
|
def getIcon(self):
|
|
return QtGui.QIcon(os.path.dirname(__file__) + "/icons/to_lines.png")
|
|
|
|
def processAlgorithm(self, progress):
|
|
vlayer = QGisLayers.getObjectFromUri(self.getParameterValue(LinesToPolygons.INPUT))
|
|
vprovider = vlayer.dataProvider()
|
|
allAttrs = vprovider.attributeIndexes()
|
|
vprovider.select( allAttrs )
|
|
fields = vprovider.fields()
|
|
writer = self.getOutputFromName(LinesToPolygons.OUTPUT).getVectorWriter(fields, QGis.WKBPolygon, vprovider.crs() )
|
|
inFeat = QgsFeature()
|
|
outFeat = QgsFeature()
|
|
inGeom = QgsGeometry()
|
|
nFeat = vprovider.featureCount()
|
|
nElement = 0
|
|
while vprovider.nextFeature(inFeat):
|
|
outGeomList = []
|
|
multi = False
|
|
nElement += 1
|
|
progress.setPercentage(int(nElement/nFeat * 100))
|
|
if inFeat.geometry().isMultipart():
|
|
outGeomList = inFeat.geometry().asMultiPolyline()
|
|
multi = True
|
|
else:
|
|
outGeomList.append( inFeat.geometry().asPolyline() )
|
|
polyGeom = self.remove_bad_lines( outGeomList )
|
|
if len(polyGeom) <> 0:
|
|
outFeat.setGeometry( QgsGeometry.fromPolygon( polyGeom ) )
|
|
atMap = inFeat.attributeMap()
|
|
outFeat.setAttributeMap( atMap )
|
|
writer.addFeature( outFeat )
|
|
del writer
|
|
|
|
|
|
def remove_bad_lines( self, lines ):
|
|
temp_geom = []
|
|
if len(lines)==1:
|
|
if len(lines[0]) > 2:
|
|
temp_geom = lines
|
|
else:
|
|
temp_geom = []
|
|
else:
|
|
temp_geom = [elem for elem in lines if len(elem) > 2]
|
|
return temp_geom
|
|
|
|
|
|
def defineCharacteristics(self):
|
|
self.name = "Lines to polygons"
|
|
self.group = "Geometry tools"
|
|
self.addParameter(ParameterVector(LinesToPolygons.INPUT, "Input layer", ParameterVector.VECTOR_TYPE_LINE))
|
|
self.addOutput(OutputVector(LinesToPolygons.OUTPUT, "Output layer"))
|
|
#=========================================================
|