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109 lines
3.9 KiB
Python
109 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ParameterTable.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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Email : volayaf at gmail dot com
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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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import os
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from qgis.core import *
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from processing.parameters.ParameterDataObject import ParameterDataObject
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from processing.tools import dataobjects
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class ParameterTable(ParameterDataObject):
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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.optional = optional
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self.value = None
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self.exported = None
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def setValue(self, obj):
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self.exported = None
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if obj is None:
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if self.optional:
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self.value = None
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return True
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else:
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return False
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if isinstance(obj, QgsVectorLayer):
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source = unicode(obj.source())
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self.value = source
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return True
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else:
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layers = dataobjects.getVectorLayers()
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for layer in layers:
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if layer.name() == self.value:
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source = unicode(layer.source())
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self.value = source
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return True
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val = unicode(obj)
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self.value = val
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return os.path.exists(self.value)
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def getSafeExportedTable(self):
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"""Returns not the value entered by the user, but a string with
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a filename which contains the data of this table, but saved in
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a standard format (currently always a DBF file) so that it can
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be opened by most external applications.
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Works only if the table represented by the parameter value is
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currently loaded in QGIS. Otherwise, it will not perform any
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export and return the current value string.
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If the current value represents a table in a suitable format,
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it does not export at all and returns that value.
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The table is exported just the first time the method is called.
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The method can be called several times and it will always
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return the same file, performing the export only the first
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time.
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"""
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if self.exported:
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return self.exported
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table = dataobjects.getObjectFromUri(self.value, False)
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if table:
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self.exported = dataobjects.exportTable(table)
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else:
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self.exported = self.value
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return self.exported
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def getFileFilter(self, alg):
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exts = ['csv', 'dbf']
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for i in range(len(exts)):
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exts[i] = exts[i].upper() + ' files(*.' + exts[i].lower() + ')'
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return ';;'.join(exts)
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def serialize(self):
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return self.__module__.split('.')[-1] + '|' + self.name + '|' \
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+ self.description + '|' + str(self.optional)
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def deserialize(self, s):
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tokens = s.split('|')
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return ParameterTable(tokens[1], tokens[2], str(True) == tokens[3])
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def getAsScriptCode(self):
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return '##' + self.name + '=table'
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