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# -*- coding: utf-8 -*-
"""
***************************************************************************
ParameterMultipleInput.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 qgis.core import *
from processing.parameters.ParameterDataObject import ParameterDataObject
from processing.tools import dataobjects
class ParameterMultipleInput(ParameterDataObject):
"""A parameter representing several data objects.
Its value is a string with substrings separated by semicolons,
each of which represents the data source location of each element.
"""
exported = None
TYPE_VECTOR_ANY = -1
TYPE_VECTOR_POINT = 0
TYPE_VECTOR_LINE = 1
TYPE_VECTOR_POLYGON = 2
TYPE_RASTER = 3
TYPE_FILE = 4
def __init__(self, name='', description='', datatype=-1, optional=False):
ParameterDataObject.__init__(self, name, description)
self.datatype = datatype
self.optional = optional
self.value = None
self.exported = None
def setValue(self, obj):
self.exported = None
if obj is None:
if self.optional:
self.value = None
return True
else:
return False
if isinstance(obj, list):
if len(obj) == 0:
if self.optional:
return True
else:
return False
self.value = ";".join([self.getAsString(lay) for lay in obj])
return True
else:
self.value = unicode(obj)
return True
def getSafeExportedLayers(self):
"""Returns not the value entered by the user, but a string with
semicolon-separated filenames which contains the data of the
selected layers, but saved in a standard format (currently
shapefiles for vector layers and GeoTiff for raster) so that
they can be opened by most external applications.
If there is a selection and QGIS is configured to use just the
selection, if exports the layer even if it is already in a
suitable format.
Works only if the layer represented by the parameter value is
currently loaded in QGIS. Otherwise, it will not perform any
export and return the current value string.
If the current value represents a layer in a suitable format,
it does no export at all and returns that value.
Currently, it works just for vector layer. In the case of
raster layers, it returns the parameter value.
The layers are exported just the first time the method is
called. The method can be called several times and it will
always return the same string, performing the export only the
first time.
"""
if self.exported:
return self.exported
self.exported = self.value
layers = self.value.split(';')
if layers is None or len(layers) == 0:
return self.value
if self.datatype == ParameterMultipleInput.TYPE_RASTER:
for layerfile in layers:
layer = dataobjects.getObjectFromUri(layerfile, False)
if layer:
filename = dataobjects.exportRasterLayer(layer)
self.exported = self.exported.replace(layerfile, filename)
return self.exported
elif self.datatype == ParameterMultipleInput.TYPE_FILE:
return self.value
else:
for layerfile in layers:
layer = dataobjects.getObjectFromUri(layerfile, False)
if layer:
filename = dataobjects.exportVectorLayer(layer)
self.exported = self.exported.replace(layerfile, filename)
return self.exported
def getAsString(self, value):
if self.datatype == ParameterMultipleInput.TYPE_RASTER:
if isinstance(value, QgsRasterLayer):
return unicode(value.dataProvider().dataSourceUri())
else:
s = unicode(value)
layers = dataobjects.getRasterLayers()
for layer in layers:
if layer.name() == s:
return unicode(layer.dataProvider().dataSourceUri())
return s
if self.datatype == ParameterMultipleInput.TYPE_FILE:
return unicode(value)
else:
if isinstance(value, QgsVectorLayer):
return unicode(value.source())
else:
s = unicode(value)
layers = dataobjects.getVectorLayers([self.datatype])
for layer in layers:
if layer.name() == s:
return unicode(layer.source())
return s
def getFileFilter(self):
if self.datatype == ParameterMultipleInput.TYPE_RASTER:
exts = dataobjects.getSupportedOutputRasterLayerExtensions()
elif self.datatype == ParameterMultipleInput.TYPE_FILE:
return "All files (*.*)"
else:
exts = dataobjects.getSupportedOutputVectorLayerExtensions()
for i in range(len(exts)):
exts[i] = exts[i].upper() + ' files(*.' + exts[i].lower() + ')'
return ';;'.join(exts)
def serialize(self):
return self.__module__.split('.')[-1] + '|' + self.name + '|' \
+ self.description + '|' + str(self.datatype) + '|' \
+ str(self.optional)
def deserialize(self, s):
tokens = s.split('|')
return ParameterMultipleInput(tokens[1], tokens[2], float(tokens[3]),
tokens[4] == str(True))
def getAsScriptCode(self):
if self.datatype == ParameterMultipleInput.TYPE_RASTER:
return '##' + self.name + '=multiple raster'
if self.datatype == ParameterMultipleInput.TYPE_FILE:
return '##' + self.name + '=multiple file'
else:
return '##' + self.name + '=multiple vector'
|
