How do I link the CrossHairTool in bokeh over several plots?

Question

When moving the crosshair (dimensions=width) in one plot I want to see the same position in the other plot(s). My plots share the same x-axis.

Here is the plot setup

Answer 1

As of bokeh v2.2.1 the solution is simplified. I am not sure whether it was already possible like this in previous versions. Here an example for sharing crosshair for both dimensions between 9 plots in a gridplot in bokeh v2.2.1:

import numpy as np
from bokeh.plotting import figure, show
from bokeh.layouts import gridplot
from bokeh.models import CrosshairTool

plots = [figure() for i in range(6)]
[plot.line(np.arange(10), np.random.random(10)) for plot in plots]
crosshair = CrosshairTool(dimensions="both")
for plot in plots:
    plot.add_tools(crosshair)

show(gridplot(children=[plot for plot in plots], ncols=3))