Source code for bokeh.models.scales

#-----------------------------------------------------------------------------
# Copyright (c) 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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'''

'''

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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 Instance, Required
from .transforms import Transform

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# Globals and constants
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__all__ = (
    'CategoricalScale',
    'CompositeScale',
    'LinearScale',
    'LogScale',
    'Scale',
)

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# General API
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[docs] @abstract class Scale(Transform): ''' Base class for ``Scale`` models that represent an invertible computation to be carried out on the client-side. JavaScript implementations should implement the following methods: .. code-block compute(x: number): number { # compute and return the transform of a single value } v_compute(xs: Arrayable<number>): Arrayable<number> { # compute and return the transform of an array of values } invert(sx: number): number { # compute and return the inverse transform of a single value } v_invert(sxs: Arrayable<number>): Arrayable<number> { # compute and return the inverse transform of an array of values } ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs)
class ContinuousScale(Scale): ''' Represent a scale transformation between continuous ranges. ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs)
[docs] class LinearScale(ContinuousScale): ''' Represent a linear scale transformation between continuous ranges. ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs)
[docs] class LogScale(ContinuousScale): ''' Represent a log scale transformation between continuous ranges. ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs)
[docs] class CategoricalScale(Scale): ''' Represent a scale transformation between a categorical source range and continuous target range. ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs)
[docs] class CompositeScale(Scale): ''' Represent a composition of two scales, which useful for defining sub-coordinate systems. ''' # explicit __init__ to support Init signatures def __init__(self, *args, **kwargs) -> None: super().__init__(*args, **kwargs) source_scale = Required(Instance(Scale), help=""" The source scale. """) target_scale = Required(Instance(Scale), help=""" The target scale. """)
# TODO assert source_scale != target_scale #----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------