I'm having a look at the dashboard example in the datashader package. In
the code of dashboard.py at around line 290 there's a method
update_hover which seems to properly take care of adding a hover layer.
When I load the nyc taxi example like this:
python dasboard.py -c nyc_taxi.yml
the hover tool is shown in the tool list on the right hand side. I can
uncheck and check the checkbox inside it, but there is nothing showing
up, when I move my mouse over any datapoint.
Am I missing something about how the hover_tool is supposed to work?
It works fine for me, when I run hover_layer.ipynb from the bokeh
examples in the same virtual environment.