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136 lines
5.4 KiB
Python
136 lines
5.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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SelectByLocation.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from qgis.core import QGis, QgsGeometry, QgsFeatureRequest
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterSelection
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterGeometryPredicate
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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class SelectByLocation(GeoAlgorithm):
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INPUT = 'INPUT'
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INTERSECT = 'INTERSECT'
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PREDICATE = 'PREDICATE'
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METHOD = 'METHOD'
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OUTPUT = 'OUTPUT'
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METHODS = ['creating new selection',
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'adding to current selection',
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'removing from current selection']
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def defineCharacteristics(self):
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self.name = 'Select by location'
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self.group = 'Vector selection tools'
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Layer to select from'),
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[ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterVector(self.INTERSECT,
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self.tr('Additional layer (intersection layer)'),
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[ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterGeometryPredicate(self.PREDICATE,
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self.tr('Geometric predicate'),
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left=self.INPUT, right=self.INTERSECT))
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self.addParameter(ParameterSelection(self.METHOD,
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self.tr('Modify current selection by'),
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self.METHODS, 0))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Selection'), True))
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def processAlgorithm(self, progress):
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filename = self.getParameterValue(self.INPUT)
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inputLayer = dataobjects.getObjectFromUri(filename)
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method = self.getParameterValue(self.METHOD)
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filename = self.getParameterValue(self.INTERSECT)
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selectLayer = dataobjects.getObjectFromUri(filename)
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predicates = self.getParameterValue(self.PREDICATE)
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oldSelection = set(inputLayer.selectedFeaturesIds())
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inputLayer.removeSelection()
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index = vector.spatialindex(inputLayer)
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if 'disjoint' in predicates:
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disjoinSet = []
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for feat in vector.features(inputLayer):
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disjoinSet.append(feat.id())
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geom = QgsGeometry()
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selectedSet = []
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current = 0
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features = vector.features(selectLayer)
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total = 100.0 / float(len(features))
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for f in features:
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geom = QgsGeometry(f.geometry())
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intersects = index.intersects(geom.boundingBox())
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for i in intersects:
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request = QgsFeatureRequest().setFilterFid(i)
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feat = inputLayer.getFeatures(request).next()
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tmpGeom = QgsGeometry(feat.geometry())
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res = False
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for predicate in predicates:
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if predicate == 'disjoint':
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if tmpGeom.intersects(geom):
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try:
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disjoinSet.remove(feat.id())
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except:
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pass # already removed
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else:
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if predicate == 'intersects':
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res = tmpGeom.intersects(geom)
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elif predicate == 'contains':
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res = tmpGeom.contains(geom)
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elif predicate == 'equals':
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res = tmpGeom.equals(geom)
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elif predicate == 'touches':
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res = tmpGeom.touches(geom)
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elif predicate == 'overlaps':
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res = tmpGeom.overlaps(geom)
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elif predicate == 'within':
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res = tmpGeom.within(geom)
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elif predicate == 'crosses':
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res = tmpGeom.crosses(geom)
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if res:
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selectedSet.append(feat.id())
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break
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current += 1
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progress.setPercentage(int(current * total))
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if 'disjoint' in predicates:
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selectedSet = selectedSet + disjoinSet
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if method == 1:
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selectedSet = list(oldSelection.union(selectedSet))
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elif method == 2:
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selectedSet = list(oldSelection.difference(selectedSet))
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inputLayer.setSelectedFeatures(selectedSet)
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self.setOutputValue(self.OUTPUT, filename)
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