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62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
"""Link and DirectionalLink classes.
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Propagate changes between widgets on the javascript side
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"""
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#-----------------------------------------------------------------------------
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# Copyright (c) 2014, the IPython Development Team.
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#
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# Distributed under the terms of the Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from .widget import Widget
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from IPython.utils.traitlets import Unicode, Tuple, Any
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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class Link(Widget):
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"""Link Widget"""
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_model_name = Unicode('LinkModel', sync=True)
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widgets = Tuple(sync=True, allow_none=False)
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def __init__(self, widgets=(), **kwargs):
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kwargs['widgets'] = widgets
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super(Link, self).__init__(**kwargs)
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# for compatibility with traitlet links
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def unlink(self):
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self.close()
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def link(*args):
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return Link(widgets=args)
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class DirectionalLink(Widget):
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"""Directional Link Widget"""
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_model_name = Unicode('DirectionalLinkModel', sync=True)
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targets = Any(sync=True)
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source = Tuple(sync=True)
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# Does not quite behave like other widgets but reproduces
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# the behavior of IPython.utils.traitlets.directional_link
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def __init__(self, source, targets=(), **kwargs):
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kwargs['source'] = source
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kwargs['targets'] = targets
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super(DirectionalLink, self).__init__(**kwargs)
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# for compatibility with traitlet links
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def unlink(self):
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self.close()
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def dlink(source, *targets):
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return DirectionalLink(source, targets)
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