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75 lines
2.9 KiB
Python
75 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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FixedDistanceBuffer.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 PyQt4.QtCore import *
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from qgis.core import *
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterBoolean
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from processing.core.parameters import ParameterNumber
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from processing.core.outputs import OutputVector
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import Buffer as buff
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from processing.tools import dataobjects
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class FixedDistanceBuffer(GeoAlgorithm):
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INPUT = 'INPUT'
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OUTPUT = 'OUTPUT'
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FIELD = 'FIELD'
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DISTANCE = 'DISTANCE'
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SEGMENTS = 'SEGMENTS'
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DISSOLVE = 'DISSOLVE'
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def defineCharacteristics(self):
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self.name = 'Fixed distance buffer'
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self.group = 'Vector geometry tools'
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Input layer'), [ParameterVector.VECTOR_TYPE_ANY]))
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self.addParameter(ParameterNumber(self.DISTANCE,
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self.tr('Distance'), default=10.0))
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self.addParameter(ParameterNumber(self.SEGMENTS,
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self.tr('Segments'), 1, default=5))
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self.addParameter(ParameterBoolean(self.DISSOLVE,
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self.tr('Dissolve result'), False))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Buffer')))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(
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self.getParameterValue(self.INPUT))
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distance = self.getParameterValue(self.DISTANCE)
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dissolve = self.getParameterValue(self.DISSOLVE)
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segments = int(self.getParameterValue(self.SEGMENTS))
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writer = self.getOutputFromName(
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self.OUTPUT).getVectorWriter(layer.pendingFields().toList(),
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QGis.WKBPolygon, layer.crs())
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buff.buffering(progress, writer, distance, None, False, layer,
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dissolve, segments)
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