Source code for bokeh.models.ui.ui_element

#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2024, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
"""

"""

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# Boilerplate
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from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

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# Imports
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# Bokeh imports
from ...core.has_props import abstract
from ...core.properties import (
    Bool,
    Dict,
    Either,
    Instance,
    List,
    Nullable,
    Seq,
    String,
)
from ...model import Model
from ..css import Styles, StyleSheet

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# Globals and constants
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__all__ = (
    "UIElement",
)

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# General API
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# Dev API
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@abstract
class UIElement(Model):
    """ Base class for user interface elements.
    """

    # explicit __init__ to support Init signatures
    def __init__(self, *args, **kwargs) -> None:
        super().__init__(*args, **kwargs)

    visible = Bool(default=True, help="""
    Whether the component should be displayed on screen.
    """)

    css_classes = List(String, default=[], help="""
    A list of additional CSS classes to add to the underlying DOM element.
    """).accepts(Seq(String), lambda x: list(x))

    styles = Either(Dict(String, Nullable(String)), Instance(Styles), default={}, help="""
    Inline CSS styles applied to the underlying DOM element.
    """)

    stylesheets = List(
        Either(
            Instance(StyleSheet),
            String,
            Dict(String, Either(Dict(String, Nullable(String)), Instance(Styles)),
        ),
    ), help="""
    Additional style-sheets to use for the underlying DOM element.

    Note that all bokeh's components use shadow DOM, thus any included style
    sheets must reflect that, e.g. use ``:host`` CSS pseudo selector to access
    the root DOM element.
    """)


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# Private API
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# Code
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