Source code for bokeh.charts.chart

''' This is the Bokeh charts interface. It gives you a high level API to build
complex plot is a simple way.

This is the main Chart class which is able to build several plots using the low
level Bokeh API. It setups all the plot characteristics and lets you plot
different chart types, taking OrderedDict as the main input. It also supports
the generation of several outputs (file, server, notebook).

from __future__ import absolute_import

from collections import defaultdict
import warnings

import numpy as np

from bokeh.core.enums import enumeration
from import Auto, Either, Enum, String, value
from bokeh.models import CategoricalAxis, DatetimeAxis, FactorRange, glyphs, Grid, HoverTool, Legend, LegendItem, LinearAxis, markers, Plot
from bokeh.plotting import DEFAULT_TOOLS
from bokeh.plotting.helpers import _process_tools_arg, _glyph_function, _process_active_tools
from bokeh.util._plot_arg_helpers import _convert_responsive

Scale = enumeration('linear', 'categorical', 'datetime')

class ChartDefaults(object):
    def apply(self, chart):
        """Apply this defaults to a chart."""

        if not isinstance(chart, Chart):
            raise ValueError(
                "ChartsDefaults should be only used on Chart objects but it's being used on %s instead." % chart

        all_props = set(chart.properties_with_values(include_defaults=True))
        dirty_props = set(chart.properties_with_values(include_defaults=False))
        for k in list(all_props.difference(dirty_props)) + \
            if k == 'tools':
                value = getattr(self, k, True)
                if getattr(chart, '_tools', None) is None:
                    chart._tools = value
                if hasattr(self, k):
                    setattr(chart, k, getattr(self, k))

defaults = ChartDefaults()

[docs]class Chart(Plot): """ The main Chart class, the core of the ``Bokeh.charts`` interface. """ __view_model__ = "Plot" __subtype__ = "Chart" xlabel = String(None, help=""" A label for the x-axis. (default: None) """) ylabel = String(None, help=""" A label for the y-axis. (default: None) """) xscale = Either(Auto, Enum(Scale), help=""" What kind of scale to use for the x-axis. """) yscale = Either(Auto, Enum(Scale), help=""" What kind of scale to use for the y-axis. """) _defaults = defaults __deprecated_attributes__ = ( 'filename', 'server', 'notebook', 'width', 'height', 'xgrid', 'ygrid', 'legend' 'background_fill', 'border_fill', 'logo', 'tools', 'title_text_baseline', 'title_text_align', 'title_text_alpha', 'title_text_color', 'title_text_font_style', 'title_text_font_size', 'title_text_font', 'title_standoff' ) _xgrid = True _ygrid = True _legend = True @Plot.xgrid.setter def xgrid(self, value): warnings.warn("Non-functional 'xgrid' setter has been removed; use 'xgrid' keyword argument to Chart instead") @Plot.ygrid.setter def ygrid(self, value): warnings.warn("Non-functional 'ygrid' setter has been removed; use 'ygrid' keyword argument to Chart instead") @Plot.legend.setter def legend(self, value): warnings.warn("Non-functional 'legend' setter has been removed; use 'legend' keyword argument to Chart instead")
[docs] def __init__(self, *args, **kwargs): # pop tools as it is also a property that doesn't match the argument # supported types tools = kwargs.pop('tools', None) for name in ['xgrid', 'ygrid', 'legend']: if name in kwargs: kwargs["_" + name] = kwargs[name] del kwargs[name] if 'responsive' in kwargs and 'sizing_mode' in kwargs: raise ValueError("Chart initialized with both 'responsive' and 'sizing_mode' supplied, supply only one") if 'responsive' in kwargs: kwargs['sizing_mode'] = _convert_responsive(kwargs['responsive']) del kwargs['responsive'] self._active_drag = kwargs.pop('active_drag', 'auto') self._active_scroll = kwargs.pop('active_scroll', 'auto') self._active_tap = kwargs.pop('active_tap', 'auto') title_text = kwargs.pop("title", None) super(Chart, self).__init__(*args, **kwargs) self.title.text = title_text defaults.apply(self) if tools is not None: self._tools = tools # TODO (fpliger): we do this to still support deprecated document but # should go away when __deprecated_attributes__ is empty for k in self.__deprecated_attributes__: if k in kwargs: setattr(self, k, kwargs[k]) self._glyphs = [] self._built = False self._builders = [] self._renderer_map = [] self._ranges = defaultdict(list) self._labels = defaultdict(list) self._scales = defaultdict(list) self._tooltips = [] if hasattr(self, '_tools'): self.create_tools(self._tools, self._active_drag, self._active_scroll, self._active_tap)
[docs] def add_renderers(self, builder, renderers): self.renderers += renderers self._renderer_map.extend({ r._id : builder for r in renderers })
[docs] def add_builder(self, builder): self._builders.append(builder) builder.create(self)
[docs] def add_ranges(self, dim, range): self._ranges[dim].append(range)
[docs] def add_labels(self, dim, label): self._labels[dim].append(label)
[docs] def add_scales(self, dim, scale): self._scales[dim].append(scale)
[docs] def add_tooltips(self, tooltips): self._tooltips += tooltips
def _get_labels(self, dim): if not getattr(self, dim + 'label') and len(self._labels[dim]) > 0: return self._labels[dim][0] else: return getattr(self, dim + 'label')
[docs] def create_axes(self): self._xaxis = self.make_axis('x', "below", self._scales['x'][0], self._get_labels('x')) self._yaxis = self.make_axis('y', "left", self._scales['y'][0], self._get_labels('y'))
[docs] def create_grids(self, xgrid=True, ygrid=True): if xgrid: self.make_grid(0, self._xaxis.ticker) if ygrid: self.make_grid(1, self._yaxis.ticker)
[docs] def create_tools(self, tools, active_drag, active_scroll, active_tap): """Create tools if given tools=True input. Only adds tools if given boolean and does not already have tools added to self. """ if isinstance(tools, bool) and tools: tools = DEFAULT_TOOLS elif isinstance(tools, bool): # in case tools == False just exit return if len( == 0: # if no tools customization let's create the default tools tool_objs, tool_map = _process_tools_arg(self, tools) self.add_tools(*tool_objs) _process_active_tools(self.toolbar, tool_map, self._active_drag, self._active_scroll, self._active_tap)
[docs] def start_plot(self): """Add the axis, grids and tools """ self.create_axes() self.create_grids(self._xgrid, self._ygrid) if self.create_tools(self._tools, self._active_drag, self._active_scroll, self._active_tap) if len(self._tooltips) > 0: self.add_tools(HoverTool(tooltips=self._tooltips))
[docs] def add_legend(self, chart_legends): """Add the legend to your plot, and the plot to a new Document. It also add the Document to a new Session in the case of server output. Args: legends(List(Tuple(String, List(GlyphRenderer)): A list of tuples that maps text labels to the legend to corresponding renderers that should draw sample representations for those labels. """ location = None if self._legend is True: location = "top_left" else: location = self._legend items = [] for legend in chart_legends: items.append(LegendItem(label=value(legend[0]), renderers=legend[1])) if location: legend = Legend(location=location, items=items) self.add_layout(legend)
[docs] def make_axis(self, dim, location, scale, label): """Create linear, date or categorical axis depending on the location, scale and with the proper labels. Args: location(str): the space localization of the axis. It can be ``left``, ``right``, ``above`` or ``below``. scale (str): the scale on the axis. It can be ``linear``, ``datetime`` or ``categorical``. label (str): the label on the axis. Return: Axis: Axis instance """ # ToDo: revisit how to handle multiple ranges # set the last range to the chart's range if len(self._ranges[dim]) == 0: raise ValueError('Ranges must be added to derive axis type.') data_range = self._ranges[dim][-1] setattr(self, dim + '_range', data_range) if scale == "auto": if isinstance(data_range, FactorRange): scale = 'categorical' else: scale = 'linear' if scale == "linear": axis = LinearAxis(axis_label=label) elif scale == "datetime": axis = DatetimeAxis(axis_label=label) elif scale == "categorical": axis = CategoricalAxis( major_label_orientation=np.pi / 4, axis_label=label ) else: axis = LinearAxis(axis_label=label) self.add_layout(axis, location) return axis
[docs] def make_grid(self, dimension, ticker): """Create the grid just passing the axis and dimension. Args: dimension(int): the dimension of the axis, ie. xaxis=0, yaxis=1. ticker (obj): the axis.ticker object Return: Grid: A Grid instance """ grid = Grid(dimension=dimension, ticker=ticker) self.add_layout(grid) return grid
annular_wedge = _glyph_function(glyphs.AnnularWedge) annulus = _glyph_function(glyphs.Annulus) arc = _glyph_function(glyphs.Arc) asterisk = _glyph_function(markers.Asterisk) bezier = _glyph_function(glyphs.Bezier) circle = _glyph_function(markers.Circle) circle_cross = _glyph_function(markers.CircleCross) circle_x = _glyph_function(markers.CircleX) cross = _glyph_function(markers.Cross) diamond = _glyph_function(markers.Diamond) diamond_cross = _glyph_function(markers.DiamondCross) ellipse = _glyph_function(glyphs.Ellipse) hbar = _glyph_function(glyphs.HBar) image = _glyph_function(glyphs.Image) image_rgba = _glyph_function(glyphs.ImageRGBA) image_url = _glyph_function(glyphs.ImageURL) inverted_triangle = _glyph_function(markers.InvertedTriangle) line = _glyph_function(glyphs.Line) multi_line = _glyph_function(glyphs.MultiLine) oval = _glyph_function(glyphs.Oval) patch = _glyph_function(glyphs.Patch) patches = _glyph_function(glyphs.Patches) quad = _glyph_function(glyphs.Quad) quadratic = _glyph_function(glyphs.Quadratic) ray = _glyph_function(glyphs.Ray) rect = _glyph_function(glyphs.Rect) segment = _glyph_function(glyphs.Segment) square = _glyph_function(markers.Square) square_cross = _glyph_function(markers.SquareCross) square_x = _glyph_function(markers.SquareX) text = _glyph_function(glyphs.Text) triangle = _glyph_function(markers.Triangle) vbar = _glyph_function(glyphs.VBar) wedge = _glyph_function(glyphs.Wedge) x = _glyph_function(markers.X)