checkbox_example.py

import numpy as np

from bokeh.layouts import row
from bokeh.models.widgets import CheckboxGroup
from bokeh.plotting import figure, show

from bokeh.core.json_encoder import serialize_json
from bokeh.document import Document
from bokeh.util.serialization import make_id


def _plot_to_json(plot):
    """Convert plot to JSON objects necessary for rendering with `bokehJS`.

    Parameters
    ----------
    plot : bokeh.plotting.figure.Figure
        Bokeh plot object to be rendered.

    Returns
    -------
    (str, str)
        Returns (docs_json, render_items) json for the desired plot.
    """
    render_items = [{'docid': plot._id, 'elementid': make_id()}]

    doc = Document()
    doc.add_root(plot)
    docs_json_inner = doc.to_json()
    docs_json = {render_items[0]['docid']: docs_json_inner}

    docs_json = serialize_json(docs_json)
    render_items = serialize_json(render_items)

    return docs_json, render_items


class CheckboxWithLegendGroup(CheckboxGroup):
    __implementation__ = """
import {empty, input, label, div} from "core/dom"
import * as p from "core/properties"

import {Widget, WidgetView} from "models/widgets/widget"

export class CheckboxWithLegendGroupView extends WidgetView
  render: () ->
    super()
    empty(@el)

    active = @model.active
    for text, i in @model.labels
      inputEl = input({type: "checkbox", value: "#{i}"})
      inputEl.addEventListener("change", () => @change_input())

      if @model.disabled then inputEl.disabled = true
      if i in active then inputEl.checked = true

      labelEl = label({}, inputEl, "▌ " + text)
      if @model.inline
        labelEl.classList.add("bk-bs-checkbox-inline")
        @el.appendChild(labelEl)
      else
        divEl = div({class: "bk-bs-checkbox"}, labelEl)
        @el.appendChild(divEl)

    return @

export class CheckboxWithLegendGroup extends Widget
  type: "CheckboxWithLegendGroup"
  default_view: CheckboxWithLegendGroupView

  @define {
      active:   [ p.Array, []    ]
      labels:   [ p.Array, []    ]
      inline:   [ p.Bool,  false ]
      callback: [ p.Instance ]
    }
"""

plot = figure()
plot.scatter(x=np.random.random(5), y=np.random.random(5))  
toggle = CheckboxWithLegendGroup(labels=['a', 'b', 'c'])

show(row(plot, toggle))