51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
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# Copyright (c) Jupyter Development Team.
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# Distributed under the terms of the Modified BSD License.
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"""Contains the DOMWidget class"""
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from traitlets import Unicode
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from .widget import Widget, widget_serialization
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from .trait_types import InstanceDict, TypedTuple
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from .widget_layout import Layout
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from .widget_style import Style
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class DOMWidget(Widget):
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"""Widget that can be inserted into the DOM"""
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_model_name = Unicode('DOMWidgetModel').tag(sync=True)
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_dom_classes = TypedTuple(trait=Unicode(), help="CSS classes applied to widget DOM element").tag(sync=True)
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layout = InstanceDict(Layout).tag(sync=True, **widget_serialization)
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def add_class(self, className):
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"""
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Adds a class to the top level element of the widget.
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Doesn't add the class if it already exists.
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"""
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if className not in self._dom_classes:
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self._dom_classes = list(self._dom_classes) + [className]
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return self
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def remove_class(self, className):
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"""
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Removes a class from the top level element of the widget.
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Doesn't remove the class if it doesn't exist.
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"""
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if className in self._dom_classes:
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self._dom_classes = [c for c in self._dom_classes if c != className]
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return self
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def _repr_keys(self):
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for key in super(DOMWidget, self)._repr_keys():
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# Exclude layout if it had the default value
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if key == 'layout':
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value = getattr(self, key)
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if repr(value) == '%s()' % value.__class__.__name__:
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continue
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yield key
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# We also need to include _dom_classes in repr for reproducibility
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if self._dom_classes:
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yield '_dom_classes'
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