attach Quad to top of figure in Bokeh

Question

As Bokeh does not support tooltips for BoxAnnotations, my workaround is to add a Quad to the figure and attach a HoverTool to the Quad. How could I make the quad always span from the top to the bottom of the figure, regardless of the zooming?

Answer 1

The default DataRange1d ranges have a renderers property that you can set to explicitly list the renderers that should be auto-ranged over. In this case you can set it to leave out the quad:

from bokeh.models import BoxAnnotation
from bokeh.plotting import figure, show

p = figure()

r = p.circle([1,2,3], [2,5,3])

p.quad(left=1.5, right=2.5, top=10e8, bottom=-10e8, alpha=0.2)

# add in all the renderers except the quad
p.y_range.renderers = [r]

show(p)