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# -*- coding: utf-8 -*-
"""
***************************************************************************
VectorLayerBoundsAlgorithm.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.core.parameters import ParameterVector
from processing.core.outputs import OutputNumber
from processing.core.outputs import OutputExtent
from processing.tools import dataobjects
class VectorLayerBoundsAlgorithm(GeoAlgorithm):
LAYER = 'LAYER'
XMIN = 'XMIN'
XMAX = 'XMAX'
YMIN = 'YMIN'
YMAX = 'YMAX'
EXTENT = 'EXTENT'
def defineCharacteristics(self):
self.showInModeler = True
self.showInToolbox = False
self.name = self.tr('Vector layer bounds', 'VectorLayerBoundsAlgorithm')
self.group = self.tr('Modeler-only tools', 'VectorLayerBoundsAlgorithm')
self.addParameter(ParameterVector(self.LAYER, self.tr('Layer', 'VectorLayerBoundsAlgorithm')))
self.addOutput(OutputNumber(self.XMIN, self.tr('min X', 'VectorLayerBoundsAlgorithm')))
self.addOutput(OutputNumber(self.XMAX, self.tr('max X', 'VectorLayerBoundsAlgorithm')))
self.addOutput(OutputNumber(self.YMIN, self.tr('min Y', 'VectorLayerBoundsAlgorithm')))
self.addOutput(OutputNumber(self.YMAX, self.tr('max Y', 'VectorLayerBoundsAlgorithm')))
self.addOutput(OutputExtent(self.EXTENT, self.tr('Extent', 'VectorLayerBoundsAlgorithm')))
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())
self.setOutputValue(self.EXTENT, (layer.extent().xMinimum(),
layer.extent().xMaximum(),
layer.extent().yMinimum(),
layer.extent().yMaximum()))
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