Glyph Decorations and Multiline

[Cosmidark]

Bokeh Version: 3.5.2
Python Version: 3.12.4
OS: Rocky Linux 9

I’m trying to use GraphRenderer to create a dynamically updated directed graph. Unfortunately, it doesn’t seem to respect decorations.

I think what I’ve narrowed down is that MultiLine doesn’t respect decorations as I can replicate the issue by creating a plot and doing the following:

ms = {'xs': [[1, 2, 3], [2, 3, 4]], 'ys': [[6, 7, 2], [4, 5, 7]], 'color': ['red','green']}
m = plot.multi_line(source=ms, color='color')
m.add_decoration(TeeHead(size=10), "end")

I’m not sure if this is on purpose, if I’m not using it correctly or if it’s just a bug.

[Cosmidark]

I will close this as I found a similar topic here:

Adding decoration to MultiLine

Hi, Thanks for the quick response! I wrote the code based on the example: from bokeh.models import VeeHead ml = p.multi_line(xs='xs', ys='ys', color='black', source=dataSource) ml.add_decoration(VeeHead(size=10), "end") The good thing is the code does not throw any exception, but it does not draw arrow heads. So, I am guessing the functionality exists but its not implemented yet. Lets hope it will be in near future! Anyways for the time being, I can just use more multi_line to draw my arrow …