If anyone is looking for a Vaadin14+ solution, we’ve build it natively with Vaadin 14 components and the drag and drop api, it was rather simple.
I am looking a solution like this for Vaadin14. Can you send me yours?
Sure, please send a short mail with your mail address over our contact form: https://www.mateforevents.com/en/contact; I’m going to fish it out from there :)