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widget_container.py
52 lines | 1.9 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, Bool, List, Instance
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class ContainerWidget(DOMWidget):
view_name = Unicode('ContainerView', sync=True)
# Keys, all private and managed by helper methods. Flexible box model
# classes...
children = List(Instance(DOMWidget))
_children = List(Instance(DOMWidget), sync=True)
def __init__(self, *pargs, **kwargs):
"""Constructor"""
DOMWidget.__init__(self, *pargs, **kwargs)
self.on_trait_change(self._validate, ['children'])
def _validate(self, name, old, new):
"""Validate children list.
Makes sure only one instance of any given model can exist in the
children list."""
if new is not None and isinstance(new, list):
children = []
for child in new:
if child not in children:
children.append(child)
self._children = children
class ModalWidget(ContainerWidget):
view_name = Unicode('ModalView', sync=True)
description = Unicode(sync=True)
button_text = Unicode(sync=True)