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# coding: utf-8
# /*##########################################################################
#
# Copyright (C) 2016-2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "16/10/2020"
import numpy
from silx.gui import qt
from .DataModel import DataModel
class ImageModel(DataModel):
def setValue(self, value):
"""Set the value of this image model."""
if value is not None:
if not isinstance(value, numpy.ndarray):
raise TypeError("A numpy array is expected, but %s was found." % value.__class__.__name__)
if len(value.shape) != 2:
raise TypeError("A 2d array is expected, but %s was found." % value.shape)
if value.dtype.kind not in "uif":
raise TypeError("A numeric array is expected, but %s was found." % value.dtype.kind)
previous = self.value()
if previous is value:
# Filter same images
return
if previous is not None and numpy.array_equal(value, previous):
# Filter same images
return
super(ImageModel, self).setValue(value)
class ImageFilenameModel(DataModel):
"""Model storing an image using it's filename."""
filenameChanged = DataModel.changed
def hasFilename(self):
"""True if this model contains a filename.
:rtype: bool
"""
return self.value() is not None
def filename(self):
"""Returns the filename associated with this model.
:rtype: Union[None,str]
"""
return self.value()
def setFilename(self, filename):
"""
Set a filename to this model
:param str filename: The new filename
"""
return self.setValue(filename)
class ImageFromFilenameModel(DataModel):
"""Model storing an image array which could come from a filename.
This model deal with unsynchronized filename/data.
"""
filenameChanged = qt.Signal()
def __init__(self, parent=None):
self.__filename = None
self.__wasChanged = False
DataModel.__init__(self, parent=parent)
def setValue(self, value):
"""Set the value of this image model."""
if value is not None:
if not isinstance(value, numpy.ndarray):
raise TypeError("A numpy array is expected, but %s was found." % value.__class__.__name__)
if len(value.shape) != 2:
raise TypeError("A 2d array is expected, but %s was found." % value.shape)
if value.dtype.kind not in "uif":
raise TypeError("A numeric array is expected, but %s was found." % value.dtype.kind)
previous = self.value()
if previous is value:
# Filter same images
return
if previous is not None and numpy.array_equal(value, previous):
# Filter same images
return
super(ImageFromFilenameModel, self).setValue(value)
self.__isSynchronized = False
def hasFilename(self):
"""True if this model contains a filename.
:rtype: bool
"""
return self.__filename is not None
def filename(self):
"""Returns the filename associated with this model.
:rtype: Union[None,str]
"""
return self.__filename
def unlockSignals(self):
self.__filenameWasChanged()
self.__wasChanged = False
return DataModel.unlockSignals(self)
def __filenameWasChanged(self):
"""Emit the change event in case of the model was not locked.
:returns: True if the signal was emitted.
"""
if self.isLocked():
self.__wasChanged = True
return False
else:
self.filenameChanged.emit()
return True
def setFilename(self, filename):
"""
Set a filename to this model
:param str filename: The new filename
"""
self.__filename = filename
self.__isSynchronized = False
self.__filenameWasChanged()
def setSynchronized(self, isSynchronized):
""""
Set if the filename and the data are synchronized.
"""
self.__isSynchronized = isSynchronized
def isSynchronized(self):
"""Returns True if the filename and the data are synchronized.
Both contains the same data.
"""
return self.__isSynchronized
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