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Python

# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.
"""Bool class.
Represents a boolean using a widget.
"""
from .widget_description import DescriptionStyle, DescriptionWidget
from .widget_core import CoreWidget
from .valuewidget import ValueWidget
from .widget import register, widget_serialization
from .trait_types import Color, InstanceDict
from traitlets import Unicode, Bool, CaselessStrEnum
@register
class CheckboxStyle(DescriptionStyle, CoreWidget):
"""Checkbox widget style."""
_model_name = Unicode('CheckboxStyleModel').tag(sync=True)
background = Unicode(None, allow_none=True, help="Background specifications.").tag(sync=True)
@register
class ToggleButtonStyle(DescriptionStyle, CoreWidget):
"""ToggleButton widget style."""
_model_name = Unicode('ToggleButtonStyleModel').tag(sync=True)
font_family = Unicode(None, allow_none=True, help="Toggle button text font family.").tag(sync=True)
font_size = Unicode(None, allow_none=True, help="Toggle button text font size.").tag(sync=True)
font_style = Unicode(None, allow_none=True, help="Toggle button text font style.").tag(sync=True)
font_variant = Unicode(None, allow_none=True, help="Toggle button text font variant.").tag(sync=True)
font_weight = Unicode(None, allow_none=True, help="Toggle button text font weight.").tag(sync=True)
text_color = Color(None, allow_none=True, help="Toggle button text color").tag(sync=True)
text_decoration = Unicode(None, allow_none=True, help="Toggle button text decoration.").tag(sync=True)
class _Bool(DescriptionWidget, ValueWidget, CoreWidget):
"""A base class for creating widgets that represent booleans."""
value = Bool(False, help="Bool value").tag(sync=True)
disabled = Bool(False, help="Enable or disable user changes.").tag(sync=True)
def __init__(self, value=None, **kwargs):
if value is not None:
kwargs['value'] = value
super().__init__(**kwargs)
_model_name = Unicode('BoolModel').tag(sync=True)
@register
class Checkbox(_Bool):
"""Displays a boolean `value` in the form of a checkbox.
Parameters
----------
value : {True,False}
value of the checkbox: True-checked, False-unchecked
description : str
description displayed next to the checkbox
indent : {True,False}
indent the control to align with other controls with a description. The style.description_width attribute controls this width for consistence with other controls.
"""
_view_name = Unicode('CheckboxView').tag(sync=True)
_model_name = Unicode('CheckboxModel').tag(sync=True)
indent = Bool(True, help="Indent the control to align with other controls with a description.").tag(sync=True)
style = InstanceDict(CheckboxStyle, help="Styling customizations").tag(sync=True, **widget_serialization)
@register
class ToggleButton(_Bool):
"""Displays a boolean `value` in the form of a toggle button.
Parameters
----------
value : {True,False}
value of the toggle button: True-pressed, False-unpressed
description : str
description displayed on the button
icon: str
font-awesome icon name
style: instance of DescriptionStyle
styling customizations
button_style: enum
button predefined styling
"""
_view_name = Unicode('ToggleButtonView').tag(sync=True)
_model_name = Unicode('ToggleButtonModel').tag(sync=True)
icon = Unicode('', help= "Font-awesome icon.").tag(sync=True)
button_style = CaselessStrEnum(
values=['primary', 'success', 'info', 'warning', 'danger', ''], default_value='',
help="""Use a predefined styling for the button.""").tag(sync=True)
style = InstanceDict(ToggleButtonStyle, help="Styling customizations").tag(sync=True, **widget_serialization)
@register
class Valid(_Bool):
"""Displays a boolean `value` in the form of a green check (True / valid)
or a red cross (False / invalid).
Parameters
----------
value: {True,False}
value of the Valid widget
"""
readout = Unicode('Invalid', help="Message displayed when the value is False").tag(sync=True)
_view_name = Unicode('ValidView').tag(sync=True)
_model_name = Unicode('ValidModel').tag(sync=True)