QGIS/python/plugins/processing/gui/Postprocessing.py

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

"""
***************************************************************************
    Postprocessing.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__ = '$Format:%H$'

import os
from PyQt4.QtGui import *
from qgis.core import *
from processing.core.ProcessingConfig import ProcessingConfig
from processing.gui.ResultsDialog import ResultsDialog
from processing.gui.RenderingStyles import RenderingStyles
from processing.gui.CouldNotLoadResultsDialog import CouldNotLoadResultsDialog
from processing.outputs.OutputRaster import OutputRaster
from processing.outputs.OutputVector import OutputVector
from processing.outputs.OutputTable import OutputTable
from processing.core.ProcessingResults import ProcessingResults
from processing.outputs.OutputHTML import OutputHTML
from processing.tools import dataobjects


class Postprocessing:

    @staticmethod
    def handleAlgorithmResults(alg, progress, showResults=True):
        wrongLayers = []
        htmlResults = False
        progress.setText('Loading resulting layers')
        i = 0
        for out in alg.outputs:
            progress.setPercentage(100 * i / float(len(alg.outputs)))
            if out.hidden or not out.open:
                continue
            if isinstance(out, (OutputRaster, OutputVector, OutputTable)):
                try:
                    if out.value.startswith('memory:'):
                        layer = out.memoryLayer
                        QgsMapLayerRegistry.instance().addMapLayers([layer])
                    else:
                        if ProcessingConfig.getSetting(
                                ProcessingConfig.USE_FILENAME_AS_LAYER_NAME):
                            name = os.path.basename(out.value)
                        else:
                            name = out.description
                        dataobjects.load(out.value, name, alg.crs,
                                RenderingStyles.getStyle(alg.commandLineName(),
                                out.name))
                except Exception, e:
                    wrongLayers.append(out)
            elif isinstance(out, OutputHTML):
                ProcessingResults.addResult(out.description, out.value)
                htmlResults = True
            i += 1
        if wrongLayers:
            QApplication.restoreOverrideCursor()
            dlg = CouldNotLoadResultsDialog(wrongLayers, alg)
            dlg.exec_()

        if showResults and htmlResults and not wrongLayers:
            QApplication.restoreOverrideCursor()
            dlg = ResultsDialog()
            dlg.exec_()