upstream/ipython Files · IPython/html/widgets/widget_image.py

widget_selection update...

widget_selection update Fix for the fact that dictionary randomization sometimes switches the order of the arguments passed to the class on initialization. This means that, potentially, 'value' can be updated BEFORE 'values', and since the method to update 'value' checks to see whether it exists in 'values', this breaks things.

Jonathan Frederic - - Load All Authors

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             widget_image.py
        
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      """ButtonWidget class.  

      Represents a button in the frontend using a widget.  Allows user to listen for

      click events on the button and trigger backend code when the clicks are fired.

      """

      #-----------------------------------------------------------------------------

      # 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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				"""ButtonWidget class.

				Represents a button in the frontend using a widget. Allows user to listen for
				click events on the button and trigger backend code when the clicks are fired.
				"""
				#-----------------------------------------------------------------------------
				# 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)