QGIS/python/plugins/processing/modeler/RasterLayerBoundsAlgorithm.py

60 lines
2.3 KiB
Python

# -*- 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())