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widget_link.py
61 lines | 1.9 KiB | text/x-python | PythonLexer
"""Link and DirectionalLink classes.
Propagate changes between widgets on the javascript side
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2014, 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 Widget
from IPython.utils.traitlets import Unicode, Tuple, Any
#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------
class Link(Widget):
"""Link Widget"""
_model_name = Unicode('LinkModel', sync=True)
widgets = Tuple(sync=True, allow_none=False)
def __init__(self, widgets=(), **kwargs):
kwargs['widgets'] = widgets
super(Link, self).__init__(**kwargs)
# for compatibility with traitlet links
def unlink(self):
self.close()
def link(*args):
return Link(widgets=args)
class DirectionalLink(Widget):
"""Directional Link Widget"""
_model_name = Unicode('DirectionalLinkModel', sync=True)
targets = Any(sync=True)
source = Tuple(sync=True)
# Does not quite behave like other widgets but reproduces
# the behavior of IPython.utils.traitlets.directional_link
def __init__(self, source, targets=(), **kwargs):
kwargs['source'] = source
kwargs['targets'] = targets
super(DirectionalLink, self).__init__(**kwargs)
# for compatibility with traitlet links
def unlink(self):
self.close()
def dlink(source, *targets):
return DirectionalLink(source, targets)