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105 lines
3.9 KiB
Python
105 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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Gridify.py
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---------------------
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Date : May 2010
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Copyright : (C) 2010 by Michael Minn
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Email : pyqgis at michaelminn 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__ = 'Michael Minn'
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__date__ = 'May 2010'
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__copyright__ = '(C) 2010, Michael Minn'
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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, QgsFeature, QgsGeometry, QgsPoint
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterTableField
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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 HubLines(GeoAlgorithm):
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HUBS = 'HUBS'
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HUB_FIELD = 'HUB_FIELD'
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SPOKES = 'SPOKES'
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SPOKE_FIELD = 'SPOKE_FIELD'
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OUTPUT = 'OUTPUT'
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def defineCharacteristics(self):
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self.name = 'Hub lines'
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self.group = 'Vector analysis tools'
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self.addParameter(ParameterVector(self.HUBS,
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self.tr('Hub point layer'), [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterTableField(self.HUB_FIELD,
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self.tr('Hub ID field'), self.HUBS))
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self.addParameter(ParameterVector(self.SPOKES,
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self.tr('Spoke point layer'), [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterTableField(self.SPOKE_FIELD,
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self.tr('Spoke ID field'), self.SPOKES))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Hub lines')))
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def processAlgorithm(self, progress):
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layerHub = dataobjects.getObjectFromUri(
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self.getParameterValue(self.HUBS))
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layerSpoke = dataobjects.getObjectFromUri(
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self.getParameterValue(self.SPOKES))
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fieldHub = self.getParameterValue(self.HUB_FIELD)
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fieldSpoke = self.getParameterValue(self.SPOKE_FIELD)
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if layerHub.source() == layerSpoke.source():
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raise GeoAlgorithmExecutionException(
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self.tr('Same layer given for both hubs and spokes'))
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writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
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layerSpoke.pendingFields(), QGis.WKBLineString, layerSpoke.crs())
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spokes = vector.features(layerSpoke)
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hubs = vector.features(layerHub)
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count = len(spokes)
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total = 100.0 / float(count)
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for count, spokepoint in enumerate(spokes):
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p = spokepoint.geometry().boundingBox().center()
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spokeX = p.x()
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spokeY = p.y()
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spokeId = unicode(spokepoint[fieldSpoke])
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for hubpoint in hubs:
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hubId = unicode(hubpoint[fieldHub])
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if hubId == spokeId:
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p = hubpoint.geometry().boundingBox().center()
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hubX = p.x()
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hubY = p.y()
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f = QgsFeature()
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f.setAttributes(spokepoint.attributes())
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f.setGeometry(QgsGeometry.fromPolyline(
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[QgsPoint(spokeX, spokeY), QgsPoint(hubX, hubY)]))
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writer.addFeature(f)
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break
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progress.setPercentage(int(count * total))
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del writer
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