BoxAnnotation should work with ColumnDataSource

Hi,

I found that a BoxAnnotation cannot currently fetch its parameters (like top, bottom) from a attached ColmunDataSource (via source argument). Other Annotations (like Arrow) can already do this. I would appreciate to see this implemented.

For instance, I’d like to do this: fig.add_layout(BoxAnnotation(left='starttime', right='enddtime', bottom='startvalue', source=data, fill_color='green', fill_alpha=0.3))

Daniel.

[bryevdv]

Closing inactive discussion. There does not seem to be enough interest to warrant adding complexity, and there are workarounds.

[mattpap]

@tomasero, can you motivate why do you specifically need BoxAnnotation or alternatively what’s missing from equivalent glyphs? In bokeh, glyphs are meant for dealing with data (including streaming), whereas annotations are for singular data points or unrelated to data altogether. Data support in annotations is more of a historical artifact than a well thought out feature.