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86 lines
4.0 KiB
Python
86 lines
4.0 KiB
Python
from sextante.core.GeoAlgorithm import GeoAlgorithm
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import os.path
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from PyQt4 import QtGui
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from qgis.core import *
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from sextante.parameters.ParameterVector import ParameterVector
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from sextante.core.QGisLayers import QGisLayers
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from sextante.outputs.OutputVector import OutputVector
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from sextante.parameters.ParameterSelection import ParameterSelection
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from sextante.parameters.ParameterBoolean import ParameterBoolean
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from sextante.ftools import ftools_utils
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class SelectByLocation(GeoAlgorithm):
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INPUT = "INPUT"
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INTERSECT = "INTERSECT"
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METHOD = "METHOD"
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USE_SELECTED = "USE_SELECTED"
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OUTPUT = "OUTPUT"
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def getIcon(self):
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return QtGui.QIcon(os.path.dirname(__file__) + "/icons/select_location.png")
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def processAlgorithm(self, progress):
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method = self.getParameterValue(self.METHOD)
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selection = self.getParameterValue(self.USE_SELECTED)
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filename = self.getParameterValue(SelectByLocation.INPUT)
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inputLayer = QGisLayers.getObjectFromUri(filename)
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filename = self.getParameterValue(SelectByLocation.INTERSECT)
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selectLayer = QGisLayers.getObjectFromUri(filename)
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inputProvider = inputLayer.dataProvider()
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allAttrs = inputProvider.attributeIndexes()
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inputProvider.select(allAttrs, QgsRectangle())
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selectProvider = selectLayer.dataProvider()
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allAttrs = selectProvider.attributeIndexes()
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selectProvider.select(allAttrs, QgsRectangle())
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feat = QgsFeature()
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infeat = QgsFeature()
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geom = QgsGeometry()
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selectedSet = []
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index = ftools_utils.createIndex(inputProvider)
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if selection:
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features = selectLayer.selectedFeatures()
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featurescount = len(features)
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i = 0
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for feat in features:
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geom = QgsGeometry(feat.geometry())
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intersects = index.intersects(geom.boundingBox())
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for id in intersects:
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inputProvider.featureAtId(int(id), infeat, True)
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tmpGeom = QgsGeometry(infeat.geometry())
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if geom.intersects(tmpGeom):
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selectedSet.append(infeat.id())
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i += 1
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progress.setPercentage(i/featurescount * 100)
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else:
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featurescount = selectProvider.featureCount()
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while selectProvider.nextFeature(feat):
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geom = QgsGeometry(feat.geometry())
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intersects = index.intersects(geom.boundingBox())
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i = 0
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for iid in intersects:
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inputProvider.featureAtId(int(iid), infeat, True)
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tmpGeom = QgsGeometry( infeat.geometry() )
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if geom.intersects(tmpGeom):
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selectedSet.append(infeat.id())
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i += 1
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progress.setPercentage(i/featurescount * 100)
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if method == 1:
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selectedSet = list(set(inputLayer.selectedFeaturesIds()).union(selectedSet))
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elif method == 2:
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selectedSet = list(set(inputLayer.selectedFeaturesIds()).difference(selectedSet))
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inputLayer.setSelectedFeatures(selectedSet)
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self.setOutputValue(self.OUTPUT, filename)
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def defineCharacteristics(self):
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self.name = "Select by location"
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self.group = "Research tools"
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self.addParameter(ParameterVector(SelectByLocation.INPUT, "Layer to select from", ParameterVector.VECTOR_TYPE_ANY))
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self.addParameter(ParameterVector(SelectByLocation.INTERSECT, "Additional layer (intersection layer)", ParameterVector.VECTOR_TYPE_ANY))
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self.addParameter(ParameterSelection(SelectByLocation.METHOD, "Modify current selection by", ["creating new selection","adding to current selection", "removing from current selection"]))
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self.addParameter(ParameterBoolean(SelectByLocation.USE_SELECTED, "Use only selected features", False))
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self.addOutput(OutputVector(SelectByLocation.OUTPUT, "Selection", True))
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