QGIS/python/plugins/sextante/outputs/OutputRaster.py

# -*- coding: utf-8 -*-

"""
***************************************************************************
    OutputRaster.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 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__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'

from sextante.core.QGisLayers import QGisLayers
from sextante.outputs.Output import Output
from sextante.core.SextanteUtils import SextanteUtils

class OutputRaster(Output):

    compatible = None

    def getFileFilter(self, alg):
        exts = QGisLayers.getSupportedOutputRasterLayerExtensions()
        for i in range(len(exts)):
            exts[i] = exts[i].upper() + " files(*." + exts[i].lower() + ")"
        return ";;".join(exts)

    def getDefaultFileExtension(self, alg):
        return alg.provider.getSupportedOutputRasterLayerExtensions()[0]

    def getCompatibleFileName(self, alg):
        '''Returns a filename that is compatible with the algorithm that is going to generate this output.
        If the algorithm supports the file format of the current output value, it returns that value. If not,
        it returns a temporary file with a supported file format, to be used to generate the output result.'''
        ext = self.value[self.value.rfind(".") + 1:]
        if ext in alg.provider.getSupportedOutputRasterLayerExtensions():
            return self.value
        else:
            if self.compatible is None:
                self.compatible = SextanteUtils.getTempFilename(self.getDefaultFileExtension(alg))
            return self.compatible;