#----------------------------------------------------------------------------- # Copyright (c) 2012 - 2020, Anaconda, Inc., and Bokeh Contributors. # All rights reserved. # # The full license is in the file LICENSE.txt, distributed with this software. #----------------------------------------------------------------------------- ''' 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.Dash` * :class:`~bokeh.models.markers.Diamond` * :class:`~bokeh.models.markers.DiamondCross` * :class:`~bokeh.models.markers.Hex` * :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: ''' #----------------------------------------------------------------------------- # Boilerplate #----------------------------------------------------------------------------- import logging # isort:skip log = logging.getLogger(__name__) #----------------------------------------------------------------------------- # Imports #----------------------------------------------------------------------------- # Bokeh imports from ..core.enums import enumeration from ..core.has_props import abstract from ..core.properties import ( AngleSpec, DistanceSpec, Enum, Include, MarkerSpec, NumberSpec, ScreenDistanceSpec, ) from ..core.property_mixins import FillProps, LineProps from .glyph import FillGlyph, LineGlyph, XYGlyph #----------------------------------------------------------------------------- # Globals and constants #----------------------------------------------------------------------------- __all__ = ( 'Asterisk', 'Circle', 'CircleCross', 'CircleX', 'Cross', 'Dash', 'Diamond', 'DiamondCross', 'Hex', 'InvertedTriangle', 'Marker', 'Scatter', 'Square', 'SquareCross', 'SquareX', 'Triangle', 'X', ) #----------------------------------------------------------------------------- # General API #----------------------------------------------------------------------------- [docs]@abstract class Marker(XYGlyph, LineGlyph, FillGlyph): ''' 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. """) class Scatter(Marker): ''' Render arbitrary markers according a specification. The Scatter can draw any built-in marker type. It can be configured to draw the same marker for all values by specifying the name of a marker, e.g. .. code-block:: python glyph = Scatter(x="x", y="y", size="sizes", marker="square") plot.add_glyph(source, glyph) will render only Square markers for all points. Alternatively, the Scatter marker can be configured to use marker types specified in a data source column: .. code-block:: python # source.data['markers'] = ["circle", "square", "circle", ... ] glyph = Scatter(x="x", y="y", size="sizes", marker="markers") plot.add_glyph(source, glyph) Note that circles drawn with `Scatter` conform to the standard Marker interface, and can only vary by size (in screen units) and *not* by radius (in data units). If you need to control circles by radius in data units, you should use the Circle glyph directly. ''' # a canonical order for positional args that can be used for any # functions derived from this class _args = ('x', 'y', 'size', 'angle', 'marker') marker = MarkerSpec(default="circle", help=""" Which marker to render. This can be the name of any built in marker, e.g. "circle", or a reference to a data column containing such names. """) __example__ = "examples/reference/models/Scatter.py" [docs]class Asterisk(Marker): ''' Render asterisk '*' markers. ''' __example__ = "examples/reference/models/Asterisk.py" [docs]class Circle(Marker): ''' Render circle markers. ''' __example__ = "examples/reference/models/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', 'max', 'min'), 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. Setting this dimension to 'max' will calculate the radius on both the x and y dimensions and use the maximum of the two, 'min' selects the minimum. """) [docs]class CircleCross(Marker): ''' Render circle markers with a '+' cross through the center. ''' __example__ = "examples/reference/models/CircleCross.py" [docs]class CircleX(Marker): ''' Render circle markers with an 'X' cross through the center. ''' __example__ = "examples/reference/models/CircleX.py" [docs]class Cross(Marker): ''' Render '+' cross markers. ''' __example__ = "examples/reference/models/Cross.py" [docs]class Dash(Marker): ''' Render dash markers. Use ``angle`` to rotate and create vertically oriented short lines. ''' __example__ = "examples/reference/models/Dash.py" [docs]class Diamond(Marker): ''' Render diamond markers. ''' __example__ = "examples/reference/models/Diamond.py" [docs]class DiamondCross(Marker): ''' Render diamond markers with a '+' cross through the center. ''' __example__ = "examples/reference/models/DiamondCross.py" [docs]class Hex(Marker): ''' Render hexagon markers. ''' __example__ = "examples/reference/models/Hex.py" [docs]class InvertedTriangle(Marker): ''' Render upside-down triangle markers. ''' __example__ = "examples/reference/models/InvertedTriangle.py" [docs]class Square(Marker): ''' Render a square marker, optionally rotated. ''' __example__ = "examples/reference/models/Square.py" [docs]class SquareCross(Marker): ''' Render square markers with a '+' cross through the center. ''' __example__ = "examples/reference/models/SquareCross.py" [docs]class SquareX(Marker): ''' Render square markers with an 'X' cross through the center. ''' __example__ = "examples/reference/models/SquareX.py" [docs]class Triangle(Marker): ''' Render triangle markers. ''' __example__ = "examples/reference/models/Triangle.py" [docs]class X(Marker): ''' Render a 'X' cross markers. ''' __example__ = "examples/reference/models/X.py" #----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- marker_types = { "asterisk": Asterisk, "circle": Circle, "circle_cross": CircleCross, "circle_x": CircleX, "cross": Cross, "dash": Dash, "diamond": Diamond, "diamond_cross": DiamondCross, "hex": Hex, "inverted_triangle": InvertedTriangle, "scatter": Scatter, "square": Square, "square_cross": SquareCross, "square_x": SquareX, "triangle": Triangle, "x": X } #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------