# -*- coding: utf-8 -*- """ *************************************************************************** RasterLayerBoundsAlgorithm.py --------------------- Date : January 2013 Copyright : (C) 2013 by Victor Olaya Email : volayaf at gmail dot com *************************************************************************** * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * *************************************************************************** """ __author__ = 'Victor Olaya' __date__ = 'January 2013' __copyright__ = '(C) 2012, Victor Olaya' # This will get replaced with a git SHA1 when you do a git archive __revision__ = '$Format:%H$' from processing.core.GeoAlgorithm import GeoAlgorithm from processing.parameters.ParameterRaster import ParameterRaster from processing.outputs.OutputNumber import OutputNumber from processing.tools import dataobjects class RasterLayerBoundsAlgorithm(GeoAlgorithm): LAYER = 'LAYER' XMIN = 'XMIN' XMAX = 'XMAX' YMIN = 'YMIN' YMAX = 'YMAX' def defineCharacteristics(self): self.showInModeler = True self.showInToolbox = False self.name = 'Raster layer bounds' self.group = 'Modeler-only tools' self.addParameter(ParameterRaster(self.LAYER, 'Layer')) self.addOutput(OutputNumber(self.XMIN, 'min X')) self.addOutput(OutputNumber(self.XMAX, 'max X')) self.addOutput(OutputNumber(self.YMIN, 'min Y')) self.addOutput(OutputNumber(self.YMAX, 'max Y')) def processAlgorithm(self, progress): uri = self.getParameterValue(self.LAYER) layer = dataobjects.getObjectFromUri(uri) self.setOutputValue(self.XMIN, layer.extent().xMinimum()) self.setOutputValue(self.XMAX, layer.extent().xMaximum()) self.setOutputValue(self.YMIN, layer.extent().yMinimum()) self.setOutputValue(self.YMAX, layer.extent().yMaximum())