Setting id and class with the haskell diagrams package

Question

I am working with the diagrams package for haskell, and I am using the SVG backend. I embed the SVG markup directly into an HTML document, so that the graph as a part of a web page. I have built a pretty cool looking bar graph, and I would like to add some basic interactivity to it. For example, when you hover over a bar, I'd like to make the color lighter. Or maybe something would pop up as well. The way that I would like to accomplish this is by setting the class attributes of some of the SVG nodes. Is this possible with the diagrams package? I know that it can target multiple backends and that that class attribute likely has no meaningful counterpart in most of them, but I was wondering if there is nevertheless a way to sneak in backend-specific information. Thanks for any insights that anyone can provide.

Answer 1

This cannot be done currently in diagrams, although it is something we would like to have in the future. You can get part of the way there using the diagrams-canvas backend, but that only displays on a local host and cannot be embedded into a web page. The only thing I can suggest is to pretty print the svg with the -p command line option and edit the svg by hand.