hover_color only works for the last GlyphRenderer

ALL software version info (bokeh, python, notebook, OS, browser, any other relevant packages)

Bokeh 0.12.13, Python 3.5, notebook 5.2.1, windows 10, Chrome

Complete, minimal, self-contained example code that reproduces the issue

from bokeh.models import ColumnDataSource
from bokeh.plotting import figure
from bokeh.io import show, output_notebook
output_notebook()

source = ColumnDataSource(data=dict(x=[1, 2, 3], y0=[1, 2, 3], y1=[-1, -2, -3]))
fig = figure(tools="hover", plot_width=500, plot_height=300, title=None)
c1 = fig.circle('x', 'y0', size=10, hover_color="firebrick", source=source)
c2 = fig.circle('x', 'y1', size=10, hover_color="firebrick", source=source)
show(fig)

Screenshots or screencasts of the bug in action

when mouse is over c1:

when mouse is over c2:

[clairetang6]

This issue is caused by the hover tool overwriting a data source’s inspected property each time a renderer is hit test against. I think the solution would be to have inspected be a dict of selections with renderers are keys instead of a single selection. (EDIT [March 11, 2018]: I no longer think this. inspected can be a single selection with the same semantics as selected. There is a single inspection for a whole data source. If a point is hovered and the inspection is set, then all data in that row is “inspected”.)

@ruoyu0088, as a workaround, you can use different sources for each of the renderers:

from bokeh.models import ColumnDataSource
from bokeh.plotting import figure
from bokeh.io import show

source1 = ColumnDataSource(data=dict(x=[1, 2, 3], y0=[1, 2, 3]))
source2 = ColumnDataSource(data=dict(x=[1, 2, 3], y1=[-1, -2, -3]))

fig = figure(tools="hover", plot_width=500, plot_height=300, title=None)
c1 = fig.circle('x', 'y0', size=10, hover_color="firebrick", source=source1)
c2 = fig.circle('x', 'y1', size=10, hover_color="firebrick", source=source2)
show(fig)

[maaxxwell1]

I have recently come across this issue as well as I am working with dashboards which slice data contained in one big pandas data frame, and have been invited to comment on this thread - see details of my experience here:

https://discourse.bokeh.org/t/bokeh-linked-scatter-charts-with-cdsview-source-data-hover-color-only-works-on-the-last-glyph-in-figure/7603

Please let us know as and when a fix for this is in the pipeline. Many thanks