Source code for bokeh.models.markers

''' Display a variety of simple scatter marker shapes whose attributes
can be associated with data columns from ``ColumnDataSources``.

The full list of markers built into Bokeh is given below:

* :class:`~bokeh.models.markers.Asterisk`
* :class:`~bokeh.models.markers.Circle`
* :class:`~bokeh.models.markers.CircleCross`
* :class:`~bokeh.models.markers.CircleX`
* :class:`~bokeh.models.markers.Cross`
* :class:`~bokeh.models.markers.Diamond`
* :class:`~bokeh.models.markers.DiamondCross`
* :class:`~bokeh.models.markers.InvertedTriangle`
* :class:`~bokeh.models.markers.Square`
* :class:`~bokeh.models.markers.SquareCross`
* :class:`~bokeh.models.markers.SquareX`
* :class:`~bokeh.models.markers.Triangle`
* :class:`~bokeh.models.markers.X`

Markers are all subclasses of ``Glyph``. Additionally, they all share the
same common interface providing fill and line properties provided by their
base class ``Marker``. Note that a few glyphs, ``Cross`` and ``X``, only
draw lines. For these the fill property values are ignored. Also note that
the ``Circle`` glyph has some additional properties such as ``radius`` that
other markers do not.

.. autoclass:: Marker
    :members:

'''
from __future__ import absolute_import

from ..core.enums import enumeration
from ..core.has_props import abstract
from ..core.properties import AngleSpec, DistanceSpec, Enum, Include, NumberSpec, ScreenDistanceSpec
from ..core.property_mixins import FillProps, LineProps

from .glyphs import Glyph

@abstract
[docs]class Marker(Glyph): ''' Base class for glyphs that are simple markers with line and fill properties, located at an (x, y) location with a specified size. .. note:: For simplicity, all markers have both line and fill properties declared, however some markers (`Asterisk`, `Cross`, `X`) only draw lines. For these markers, the fill values are simply ignored. ''' # a canonical order for positional args that can be used for any # functions derived from this class _args = ('x', 'y', 'size', 'angle') x = NumberSpec(help=""" The x-axis coordinates for the center of the markers. """) y = NumberSpec(help=""" The y-axis coordinates for the center of the markers. """) size = ScreenDistanceSpec(default=4, help=""" The size (diameter) values for the markers in screen space units. """) angle = AngleSpec(default=0.0, help=""" The angles to rotate the markers. """) line_props = Include(LineProps, use_prefix=False, help=""" The %s values for the markers. """) fill_props = Include(FillProps, use_prefix=False, help=""" The %s values for the markers. """)
[docs]class Asterisk(Marker): ''' Render asterisk '*' markers. ''' __example__ = "tests/glyphs/Asterisk.py"
[docs]class Circle(Marker): ''' Render circle markers. ''' __example__ = "tests/glyphs/Circle.py" # a canonical order for positional args that can be used for any # functions derived from this class _args = ('x', 'y') radius = DistanceSpec(None, help=""" The radius values for circle markers (in "data space" units, by default). .. note:: Circle markers are slightly unusual in that they support specifying a radius in addition to a size. Only one of ``radius`` or ``size`` should be given. .. warning:: Note that ``Circle`` glyphs are always drawn as circles on the screen, even in cases where the data space aspect ratio is not 1-1. In all cases where radius values are specified, the "distance" for the radius is measured along the dimension specified by ``radius_dimension``. If the aspect ratio is very large or small, the drawn circles may appear much larger or smaller than expected. See :bokeh-issue:`626` for more information. """) radius_dimension = Enum(enumeration('x', 'y'), help=""" What dimension to measure circle radii along. When the data space aspect ratio is not 1-1, then the size of the drawn circles depends on what direction is used to measure the "distance" of the radius. This property allows that direction to be controlled. """)
[docs]class CircleCross(Marker): ''' Render circle markers with a '+' cross through the center. ''' __example__ = "tests/glyphs/CircleCross.py"
[docs]class CircleX(Marker): ''' Render circle markers with an 'X' cross through the center. ''' __example__ = "tests/glyphs/CircleX.py"
[docs]class Cross(Marker): ''' Render '+' cross markers. ''' __example__ = "tests/glyphs/Cross.py"
[docs]class Diamond(Marker): ''' Render diamond markers. ''' __example__ = "tests/glyphs/Diamond.py"
[docs]class DiamondCross(Marker): ''' Render diamond markers with a '+' cross through the center. ''' __example__ = "tests/glyphs/DiamondCross.py"
[docs]class InvertedTriangle(Marker): ''' Render upside-down triangle markers. ''' __example__ = "tests/glyphs/InvertedTriangle.py"
[docs]class Square(Marker): ''' Render a square marker, optionally rotated. ''' __example__ = "tests/glyphs/Square.py"
[docs]class SquareCross(Marker): ''' Render square markers with a '+' cross through the center. ''' __example__ = "tests/glyphs/SquareCross.py"
[docs]class SquareX(Marker): ''' Render square markers with an 'X' cross through the center. ''' __example__ = "tests/glyphs/SquareX.py"
[docs]class Triangle(Marker): ''' Render triangle markers. ''' __example__ = "tests/glyphs/Triangle.py"
[docs]class X(Marker): ''' Render a 'X' cross markers. ''' __example__ = "tests/glyphs/X.py"