#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2022, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
'''
'''
#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Bokeh imports
from ...core.enums import (
AngleUnits,
CoordinateUnits,
TextAlign,
VerticalAlign,
)
from ...core.has_props import abstract
from ...core.properties import (
Angle,
AngleSpec,
Datetime,
Enum,
Float,
Include,
NullStringSpec,
NumberSpec,
Override,
Required,
TextLike,
field,
)
from ...core.property_mixins import (
FillProps,
LineProps,
ScalarFillProps,
ScalarLineProps,
ScalarTextProps,
TextProps,
)
from ...util.serialization import convert_datetime_type
from .annotation import Annotation, DataAnnotation
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# Globals and constants
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__all__ = (
"Label",
"LabelSet",
"Title",
"TextAnnotation",
)
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# General API
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[docs]@abstract
class TextAnnotation(Annotation):
''' Base class for text annotation models such as labels and titles.
'''
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
text = TextLike(default="", help="""
A text or LaTeX notation to render.
""")
text_props = Include(ScalarTextProps, help="""
The {prop} values for the text.
""")
background_props = Include(ScalarFillProps, prefix="background", help="""
The {prop} values for the text bounding box.
""")
background_fill_color = Override(default=None)
border_props = Include(ScalarLineProps, prefix="border", help="""
The {prop} values for the text bounding box.
""")
border_line_color = Override(default=None)
[docs]class Label(TextAnnotation):
''' Render a single text label as an annotation.
``Label`` will render a single text label at given ``x`` and ``y``
coordinates, which can be in either screen (pixel) space, or data (axis
range) space.
The label can also be configured with a screen space offset from ``x`` and
``y``, by using the ``x_offset`` and ``y_offset`` properties.
Additionally, the label can be rotated with the ``angle`` property.
There are also standard text, fill, and line properties to control the
appearance of the text, its background, as well as the rectangular bounding
box border.
See :ref:`ug_basic_annotations_labels` for information on plotting labels.
'''
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
x = Required(Float, help="""
The x-coordinate in screen coordinates to locate the text anchors.
Datetime values are also accepted, but note that they are immediately
converted to milliseconds-since-epoch.
""").accepts(Datetime, convert_datetime_type)
x_units = Enum(CoordinateUnits, default='data', help="""
The unit type for the x attribute. Interpreted as |data units| by
default.
""")
y = Required(Float, help="""
The y-coordinate in screen coordinates to locate the text anchors.
Datetime values are also accepted, but note that they are immediately
converted to milliseconds-since-epoch.
""").accepts(Datetime, convert_datetime_type)
y_units = Enum(CoordinateUnits, default='data', help="""
The unit type for the y attribute. Interpreted as |data units| by
default.
""")
angle = Angle(default=0, help="""
The angle to rotate the text, as measured from the horizontal.
""")
angle_units = Enum(AngleUnits, default='rad', help="""
Acceptable values for units are ``"rad"`` and ``"deg"``
""")
x_offset = Float(default=0, help="""
Offset value to apply to the x-coordinate.
This is useful, for instance, if it is desired to "float" text a fixed
distance in |screen units| from a given data position.
""")
y_offset = Float(default=0, help="""
Offset value to apply to the y-coordinate.
This is useful, for instance, if it is desired to "float" text a fixed
distance in |screen units| from a given data position.
""")
[docs]class LabelSet(DataAnnotation):
''' Render multiple text labels as annotations.
``LabelSet`` will render multiple text labels at given ``x`` and ``y``
coordinates, which can be in either screen (pixel) space, or data (axis
range) space. In this case (as opposed to the single ``Label`` model),
``x`` and ``y`` can also be the name of a column from a
:class:`~bokeh.models.sources.ColumnDataSource`, in which case the labels
will be "vectorized" using coordinate values from the specified columns.
The label can also be configured with a screen space offset from ``x`` and
``y``, by using the ``x_offset`` and ``y_offset`` properties. These offsets
may be vectorized by giving the name of a data source column.
Additionally, the label can be rotated with the ``angle`` property (which
may also be a column name.)
There are also standard text, fill, and line properties to control the
appearance of the text, its background, as well as the rectangular bounding
box border.
The data source is provided by setting the ``source`` property.
'''
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
x = NumberSpec(default=field("x"), help="""
The x-coordinates to locate the text anchors.
""")
x_units = Enum(CoordinateUnits, default='data', help="""
The unit type for the ``xs`` attribute. Interpreted as |data units| by
default.
""")
y = NumberSpec(default=field("y"), help="""
The y-coordinates to locate the text anchors.
""")
y_units = Enum(CoordinateUnits, default='data', help="""
The unit type for the ``ys`` attribute. Interpreted as |data units| by
default.
""")
text = NullStringSpec(default=field("text"), help="""
The text values to render.
""")
angle = AngleSpec(default=0, help="""
The angles to rotate the text, as measured from the horizontal.
""")
x_offset = NumberSpec(default=0, help="""
Offset values to apply to the x-coordinates.
This is useful, for instance, if it is desired to "float" text a fixed
distance in |screen units| from a given data position.
""")
y_offset = NumberSpec(default=0, help="""
Offset values to apply to the y-coordinates.
This is useful, for instance, if it is desired to "float" text a fixed
distance in |screen units| from a given data position.
""")
text_props = Include(TextProps, help="""
The {prop} values for the text.
""")
background_props = Include(FillProps, prefix="background", help="""
The {prop} values for the text bounding box.
""")
background_fill_color = Override(default=None)
border_props = Include(LineProps, prefix="border", help="""
The {prop} values for the text bounding box.
""")
border_line_color = Override(default=None)
[docs]class Title(TextAnnotation):
''' Render a single title box as an annotation.
See :ref:`ug_basic_annotations_titles` for information on plotting titles.
'''
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
vertical_align = Enum(VerticalAlign, default='bottom', help="""
Alignment of the text in its enclosing space, *across* the direction of the text.
""")
align = Enum(TextAlign, default='left', help="""
Alignment of the text in its enclosing space, *along* the direction of the text.
""")
offset = Float(default=0, help="""
Offset the text by a number of pixels (can be positive or negative). Shifts the text in
different directions based on the location of the title:
* above: shifts title right
* right: shifts title down
* below: shifts title right
* left: shifts title up
""")
standoff = Float(default=10, help="""
""")
text_font_size = Override(default="13px")
text_font_style = Override(default="bold")
text_line_height = Override(default=1.0)
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# Dev API
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#-----------------------------------------------------------------------------
# Private API
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#-----------------------------------------------------------------------------
# Code
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