mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-24 00:47:57 -05:00
94 lines
3.9 KiB
Python
94 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
ParameterRaster.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. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
import os
|
|
|
|
__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 processing.parameters.ParameterDataObject import ParameterDataObject
|
|
from processing.core.QGisLayers import QGisLayers
|
|
from qgis.core import *
|
|
from processing.core.LayerExporter import LayerExporter
|
|
|
|
class ParameterRaster(ParameterDataObject):
|
|
|
|
def __init__(self, name="", description="", optional=False):
|
|
ParameterDataObject.__init__(self, name, description)
|
|
self.optional = optional
|
|
self.value = None
|
|
self.exported = None
|
|
|
|
def getSafeExportedLayer(self):
|
|
'''Returns not the value entered by the user, but a string with a filename which
|
|
contains the data of this layer, but saved in a standard format (currently always
|
|
a geotiff file) so that it can be opened by most external applications.
|
|
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 not export at all
|
|
and returns that value.
|
|
The layer is exported just the first time the method is called. The method can be called
|
|
several times and it will always return the same file, performing the export only the first time.'''
|
|
if self.exported:
|
|
return self.exported
|
|
layer = QGisLayers.getObjectFromUri(self.value, False)
|
|
if layer:
|
|
self.exported = LayerExporter.exportRasterLayer(layer)
|
|
else:
|
|
self.exported = self.value
|
|
return self.exported
|
|
|
|
def setValue(self, obj):
|
|
self.exported = None
|
|
if obj == None:
|
|
if self.optional:
|
|
self.value = None
|
|
return True
|
|
else:
|
|
return False
|
|
if isinstance(obj, QgsRasterLayer):
|
|
self.value = unicode(obj.dataProvider().dataSourceUri())
|
|
return True
|
|
else:
|
|
self.value = unicode(obj)
|
|
layers = QGisLayers.getRasterLayers()
|
|
for layer in layers:
|
|
if layer.name() == self.value:
|
|
self.value = unicode(layer.dataProvider().dataSourceUri())
|
|
return True
|
|
return os.path.exists(self.value)
|
|
|
|
def getFileFilter(self):
|
|
exts = QGisLayers.getSupportedOutputRasterLayerExtensions()
|
|
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.optional)
|
|
|
|
def deserialize(self, s):
|
|
tokens = s.split("|")
|
|
return ParameterRaster(tokens[1], tokens[2], str(True) == tokens[3])
|
|
|
|
def getAsScriptCode(self):
|
|
return "##" + self.name + "=raster" |