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105 lines
4.4 KiB
Python
105 lines
4.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ParameterMultipleExternalInput.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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(C) 2013 by CS Systemes d'information (CS SI)
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Email : volayaf at gmail dot com
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otb at c-s dot fr (CS SI)
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Contributors : Victor Olaya - basis from ParameterMultipleInput
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Alexia Mondot (CS SI) - managing the new parameter ParameterMultipleExternalInput
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'August 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from processing.parameters.ParameterDataObject import ParameterDataObject
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from qgis.core import *
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class ParameterMultipleExternalInput(ParameterDataObject):
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'''A parameter representing several data objects.
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Its value is a string with substrings separated by semicolons, each of which
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represents the data source location of each element'''
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exported = None
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def __init__(self, name="", description="", optional = False):
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ParameterDataObject.__init__(self, name, description)
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self.datatype = None # to delete
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self.optional = optional
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self.value = None
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self.exported = None
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self.default=""
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def setValue(self, obj):
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if isinstance(obj, list):
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if len(obj) == 0:
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if self.optional:
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return True
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else:
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return False
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s = ""
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idx = 0
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for filename in obj:
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s += filename
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if idx < len(obj) - 1:
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s+=" "
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idx=idx+1;
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self.value = s;
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return True
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def getSafeExportedLayers(self):
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'''Returns not the value entered by the user, but a string with semicolon-separated filenames
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which contains the data of the selected layers, but saved in a standard format (currently
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shapefiles for vector layers and GeoTiff for raster) so that they can be opened by most
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external applications.
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If there is a selection and QGIS is configured to use just the selection, if exports
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the layer even if it is already in a suitable format.
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Works only if the layer represented by the parameter value is currently loaded in QGIS.
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Otherwise, it will not perform any export and return the current value string.
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If the current value represents a layer in a suitable format, it does no export at all
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and returns that value.
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Currently, it works just for vector layer. In the case of raster layers, it returns the
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parameter value.
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The layers are exported just the first time the method is called. The method can be called
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several times and it will always return the same string, performing the export only the first time.'''
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if self.exported:
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return self.exported
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self.exported = self.value
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layers = self.value.split(";")
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if layers == None or len(layers) == 0:
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return self.value
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return layers
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def serialize(self):
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return self.__module__.split(".")[-1] + "|" + self.name + "|" + self.description + "|" + str(self.optional)
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def deserialize(self, s):
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"""
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in : string : ParameterNumber|-nodatalabel|Label for the NoData class|None|None|0
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returns the current class object from extracted information from s
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"""
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tokens = s.split("|")
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return ParameterMultipleExternalInput(tokens[1], tokens[2], tokens[3] == str(True))
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def getAsScriptCode(self):
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return "##" + self.name
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