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"""ImageWidget 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
from IPython.utils.traitlets import Unicode, CUnicode, Bytes
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class ImageWidget(DOMWidget):
_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)
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