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widget_image.py
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widget_image.py
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"""Image class.
Represents an image in the frontend using a widget.
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2013, the IPython Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import base64
from .widget import DOMWidget, register
from IPython.utils.traitlets import Unicode, CUnicode, Bytes
from IPython.utils.warn import DeprecatedClass
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
@register('IPython.Image')
class Image(DOMWidget):
"""Displays an image as a widget.
The `value` of this widget accepts a byte string. The byte string is the raw
image data that you want the browser to display. You can explicitly define
the format of the byte string using the `format` trait (which defaults to
"png")."""
_view_name = Unicode('ImageView', sync=True)
# Define the custom state properties to sync with the front-end
format = Unicode('png', sync=True)
width = CUnicode(sync=True)
height = CUnicode(sync=True)
_b64value = Unicode(sync=True)
value = Bytes()
def _value_changed(self, name, old, new):
self._b64value = base64.b64encode(new)
# Remove in IPython 4.0
ImageWidget = DeprecatedClass(Image, 'ImageWidget')