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62 lines
2.6 KiB
Python
62 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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VectorLayerBoundsAlgorithm.py
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---------------------
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Date : January 2013
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Copyright : (C) 2013 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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from processing.outputs.OutputExtent import OutputExtent
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__author__ = 'Victor Olaya'
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__date__ = 'January 2013'
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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 processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.outputs.OutputNumber import OutputNumber
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from processing.tools import dataobjects
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from processing.parameters.ParameterVector import ParameterVector
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class VectorLayerBoundsAlgorithm(GeoAlgorithm):
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LAYER = "LAYER"
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XMIN = "XMIN"
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XMAX = "XMAX"
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YMIN = "YMIN"
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YMAX = "YMAX"
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EXTENT = "EXTENT"
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def defineCharacteristics(self):
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self.showInModeler = True
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self.showInToolbox = False
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self.name = "Vector layer bounds"
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self.group = "Modeler-only tools"
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self.addParameter(ParameterVector(self.LAYER, "Layer"))
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self.addOutput(OutputNumber(self.XMIN, "min X"))
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self.addOutput(OutputNumber(self.XMAX, "max X"))
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self.addOutput(OutputNumber(self.YMIN, "min Y"))
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self.addOutput(OutputNumber(self.YMAX, "max Y"))
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self.addOutput(OutputExtent(self.EXTENT, "Extent"))
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def processAlgorithm(self, progress):
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uri = self.getParameterValue(self.LAYER)
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layer = dataobjects.getObjectFromUri(uri);
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self.setOutputValue(self.XMIN, layer.extent().xMinimum())
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self.setOutputValue(self.XMAX, layer.extent().xMaximum())
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self.setOutputValue(self.YMIN, layer.extent().yMinimum())
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self.setOutputValue(self.YMAX, layer.extent().yMaximum())
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self.setOutputValue(self.EXTENT,
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(layer.extent().xMinimum(), layer.extent().xMaximum(), layer.extent().yMinimum(), layer.extent().yMaximum()))
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