#-----------------------------------------------------------------------------
# Copyright (c) Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
''' Various kinds of slider widgets.
'''
#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Standard library imports
import numbers
from datetime import date, datetime, timezone
# Bokeh imports
from ...core.has_props import abstract
from ...core.properties import (
Bool,
Color,
Datetime,
Either,
Enum,
Float,
Instance,
Int,
Nullable,
Override,
Readonly,
Required,
Seq,
String,
Tuple,
)
from ...core.property.descriptors import UnsetValueError
from ...core.property.singletons import Undefined
from ...core.validation import error
from ...core.validation.errors import EQUAL_SLIDER_START_END
from ..formatters import TickFormatter
from .widget import Widget
#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------
__all__ = (
'AbstractSlider',
'CategoricalSlider',
'Slider',
'RangeSlider',
'DateSlider',
'DateRangeSlider',
'DatetimeRangeSlider',
)
#-----------------------------------------------------------------------------
# Dev API
#-----------------------------------------------------------------------------
[docs]
@abstract
class AbstractSlider(Widget):
""" """
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
try:
# synchronize the value of a readonly property `value_throttled`
self.lookup("value_throttled")._set(self, Undefined, self.value)
except UnsetValueError:
pass
except AttributeError:
# TODO Remove this when proper support for property overrides is
# implemented. For now this is required to make defaults' tests
# work, because we depend there on model instances to provide
# "default" values.
pass
# TODO value = Required(GenericType, help="""
# Initial or selected range.
# """)
# TODO value_throttled = Readonly(GenericType, help="""
# Initial or selected value, throttled according to report only on mouseup.
# """)
orientation = Enum("horizontal", "vertical", help="""
Orient the slider either horizontally (default) or vertically.
""")
title = Nullable(String, default="", help="""
The slider's label (supports :ref:`math text <ug_styling_mathtext>`).
""")
show_value = Bool(default=True, help="""
Whether or not show slider's value.
""")
direction = Enum("ltr", "rtl", help="""
""")
tooltips = Bool(default=True, help="""
Display the slider's current value in a tooltip.
""")
bar_color = Color(default="#e6e6e6", help="""
""")
width = Override(default=300)
@error(EQUAL_SLIDER_START_END)
def _check_missing_dimension(self):
if hasattr(self, 'start') and hasattr(self, 'end'):
if self.start == self.end:
return f"{self!s} with title {self.title!s}"
@abstract
class NumericalSlider(AbstractSlider):
""" Base class for numerical sliders. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
format = Either(String, Instance(TickFormatter), help="""
""")
#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------
[docs]
class CategoricalSlider(AbstractSlider):
""" Discrete slider allowing selection from a collection of values. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
categories = Required(Seq(String), help="""
A collection of categories to choose from.
""")
value = Required(String, help="""
Initial or selected value.
""")
value_throttled = Readonly(Required(String), help="""
Initial or throttled selected value.
""")
[docs]
class Slider(NumericalSlider):
""" Slider-based number selection widget. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
start = Required(Float, help="""
The minimum allowable value.
""")
end = Required(Float, help="""
The maximum allowable value.
""")
value = Required(Float, help="""
Initial or selected value.
""")
value_throttled = Readonly(Required(Float), help="""
Initial or selected value, throttled according to report only on mouseup.
""")
step = Float(default=1, help="""
The step between consecutive values.
""")
format = Override(default="0[.]00")
[docs]
class RangeSlider(NumericalSlider):
""" Range-slider based number range selection widget. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
value = Required(Tuple(Float, Float), help="""
Initial or selected range.
""")
value_throttled = Readonly(Required(Tuple(Float, Float)), help="""
Initial or selected value, throttled according to report only on mouseup.
""")
start = Required(Float, help="""
The minimum allowable value.
""")
end = Required(Float, help="""
The maximum allowable value.
""")
step = Float(default=1, help="""
The step between consecutive values.
""")
format = Override(default="0[.]00")
[docs]
class DateSlider(NumericalSlider):
""" Slider-based date selection widget. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
@property
def value_as_datetime(self) -> datetime | None:
''' Convenience property to retrieve the value as a datetime object.
Added in version 2.0
'''
if self.value is None:
return None
if isinstance(self.value, numbers.Number):
return datetime.fromtimestamp(self.value / 1000, tz=timezone.utc)
return self.value
@property
def value_as_date(self) -> date | None:
''' Convenience property to retrieve the value as a date object.
Added in version 2.0
'''
if self.value is None:
return None
if isinstance(self.value, numbers.Number):
dt = datetime.fromtimestamp(self.value / 1000, tz=timezone.utc)
return date(*dt.timetuple()[:3])
return self.value
value = Required(Datetime, help="""
Initial or selected value.
""")
value_throttled = Readonly(Required(Datetime), help="""
Initial or selected value, throttled to report only on mouseup.
""")
start = Required(Datetime, help="""
The minimum allowable value.
""")
end = Required(Datetime, help="""
The maximum allowable value.
""")
step = Int(default=1, help="""
The step between consecutive values, in units of days.
""")
format = Override(default="%d %b %Y")
[docs]
class DateRangeSlider(NumericalSlider):
""" Slider-based date range selection widget. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
@property
def value_as_datetime(self) -> tuple[datetime, datetime] | None:
''' Convenience property to retrieve the value tuple as a tuple of
datetime objects.
Added in version 1.1
'''
if self.value is None:
return None
v1, v2 = self.value
if isinstance(v1, numbers.Number):
d1 = datetime.fromtimestamp(v1 / 1000, tz=timezone.utc)
else:
d1 = v1
if isinstance(v2, numbers.Number):
d2 = datetime.fromtimestamp(v2 / 1000, tz=timezone.utc)
else:
d2 = v2
return d1, d2
@property
def value_as_date(self) -> tuple[date, date] | None:
''' Convenience property to retrieve the value tuple as a tuple of
date objects.
Added in version 1.1
'''
if self.value is None:
return None
v1, v2 = self.value
if isinstance(v1, numbers.Number):
dt = datetime.fromtimestamp(v1 / 1000, tz=timezone.utc)
d1 = date(*dt.timetuple()[:3])
else:
d1 = v1
if isinstance(v2, numbers.Number):
dt = datetime.fromtimestamp(v2 / 1000, tz=timezone.utc)
d2 = date(*dt.timetuple()[:3])
else:
d2 = v2
return d1, d2
value = Required(Tuple(Datetime, Datetime), help="""
Initial or selected range.
""")
value_throttled = Readonly(Required(Tuple(Datetime, Datetime)), help="""
Initial or selected value, throttled to report only on mouseup.
""")
start = Required(Datetime, help="""
The minimum allowable value.
""")
end = Required(Datetime, help="""
The maximum allowable value.
""")
step = Int(default=1, help="""
The step between consecutive values, in units of days.
""")
format = Override(default="%d %b %Y")
[docs]
class DatetimeRangeSlider(NumericalSlider):
""" Slider-based datetime range selection widget. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
@property
def value_as_datetime(self) -> tuple[datetime, datetime] | None:
''' Convenience property to retrieve the value tuple as a tuple of
datetime objects.
'''
if self.value is None:
return None
v1, v2 = self.value
if isinstance(v1, numbers.Number):
d1 = datetime.fromtimestamp(v1 / 1000, tz=timezone.utc)
else:
d1 = v1
if isinstance(v2, numbers.Number):
d2 = datetime.fromtimestamp(v2 / 1000, tz=timezone.utc)
else:
d2 = v2
return d1, d2
value = Required(Tuple(Datetime, Datetime), help="""
Initial or selected range.
""")
value_throttled = Readonly(Required(Tuple(Datetime, Datetime)), help="""
Initial or selected value, throttled to report only on mouseup.
""")
start = Required(Datetime, help="""
The minimum allowable value.
""")
end = Required(Datetime, help="""
The maximum allowable value.
""")
step = Int(default=3_600_000, help="""
The step between consecutive values, in units of milliseconds.
Default is one hour.
""")
format = Override(default="%d %b %Y %H:%M:%S")
#-----------------------------------------------------------------------------
# Private API
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
