散景：无法更新悬停工具提示的格式

Question

I'm trying to update the format of an already defined hover tooltip, but I do not observe any change. The change I do in the example below is changing the x-axis between number and time scale ('00:00:00'). The x-axis is updated as expected. Using Bokeh version 0.12.16, mac OS X, Safari browser.

Any hints with respect to what I'm doing wrong is appreciated.

from bokeh.plotting import figure, ColumnDataSource
from bokeh.models import HoverTool, NumeralTickFormatter, AdaptiveTicker
from bokeh.models.widgets import RadioGroup
from bokeh.layouts import row, widgetbox
from bokeh.io import curdoc


def update_axis_format(new):
    if new == 0:
        format_num = '0'
        mantissas= [1,2,5]
    else:
        format_num = '00:00:00'
        mantissas=[3.6, 7.2, 18]

    p.xaxis[0].formatter = NumeralTickFormatter(format = format_num)
    p.xaxis.ticker = AdaptiveTicker(base = 10, mantissas = mantissas)
    p.xgrid.ticker = AdaptiveTicker(base = 10, mantissas = mantissas)
    p.tools[0].tooltips[2] = ("x", "@x{{{}}}".format(format_num))


source = ColumnDataSource(data=dict(
    x=[10, 2000, 10000, 40000, 50000],
    y=[2, 5, 8, 2, 7],
    desc=['A', 'b', 'C', 'd', 'E'],
))

hover = HoverTool(tooltips=[
    ("index", "$index"),
    ("desc", "@desc"),
    ("x", "@x")
])

p = figure(plot_width=400, plot_height=400, tools=[hover],
           title="Mouse over the dots")

p.circle('x', 'y', size=20, source=source)

xaxis_format = RadioGroup(
        labels=["x-axis as number", "x-axis as time"], active=0)

xaxis_format.on_click(update_axis_format)

widget = widgetbox(xaxis_format)

curdoc().add_root(row(widget,p))

Answer 1

The BokehJS code is not sensitive to "internal" (ie in place) changes to tooltips . You need to replace the tooltips value entirely. Eg this simplified code works as expected:

def update_axis_format(new):
    if new == 0:
        format_num = '0'
        mantissas= [1,2,5]
    else:
        format_num = '00:00:00'
        mantissas=[3.6, 7.2, 18]

    p.xaxis[0].formatter = NumeralTickFormatter(format = format_num)
    p.xaxis.ticker = AdaptiveTicker(base = 10, mantissas = mantissas)
    p.xgrid.ticker = AdaptiveTicker(base = 10, mantissas = mantissas)

    # replace all of tooltips, not just part
    p.tools[0].tooltips = [("x", "@x{{{}}}".format(format_num))]

hover = HoverTool(tooltips=[("x", "@x")])