How to get the selected rect from multiple rects?

[flealq]

Hi

I wonder if there’s a way to find which rect has been selected or in edit stat.

as above, the relayoutData are all the same no matter which rect is under edit. So how could get the chosen one?

PS. I found “shapelayer” in html is changing while altering different rect, but still don’t know how to get it.

[flealq]

while. I think there may have no simple/direct way to do that now. Several posts that I found for this:

1. Feature request 644 on dash github. It seems plotly.js could handle it, but I do not know how to…

2. https://community.plotly.com/t/events-for-shapes/9601

while I’d thought about that yesterday, here I found it may work. Great thanks to him!

Actually, my app is for object detection. And I want to choose or modify certain (but multiple) rects to see the result interactively.

It’s still quite strange why dash couldn’t handle this.