##// END OF EJS Templates
Merge pull request #5229 from minrk/safe-get-ipdisplay...
Merge pull request #5229 from minrk/safe-get-ipdisplay get _ipython_display_ method safely

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widget_container.py
53 lines | 2.0 KiB | text/x-python | PythonLexer
"""ContainerWidget class.
Represents a container that can be used to group other widgets.
"""
#-----------------------------------------------------------------------------
# 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
#-----------------------------------------------------------------------------
from .widget import DOMWidget
from IPython.utils.traitlets import Unicode, Tuple, TraitError
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class ContainerWidget(DOMWidget):
_view_name = Unicode('ContainerView', sync=True)
# Child widgets in the container.
# Using a tuple here to force reassignment to update the list.
# When a proper notifying-list trait exists, that is what should be used here.
children = Tuple()
_children = Tuple(sync=True)
def _children_changed(self, name, old, new):
"""Validate children list.
Makes sure only one instance of any given model can exist in the
children list.
An excellent post on uniqifiers is available at
http://www.peterbe.com/plog/uniqifiers-benchmark
which provides the inspiration for using this implementation. Below
I've implemented the `f5` algorithm using Python comprehensions."""
if new is not None:
seen = {}
def add_item(i):
seen[i.model_id] = True
return i
self._children = [add_item(i) for i in new if not i.model_id in seen]
class PopupWidget(ContainerWidget):
_view_name = Unicode('PopupView', sync=True)
description = Unicode(sync=True)
button_text = Unicode(sync=True)