Hi Fabian,
To achieve your requirement, please cancel the drop event by setting args.cancel=true and then add a new nodes and connectors. Please refer to the code example below.
Code example:
DiagramContent.OnClientDrop = "nodeondrop";
function nodeondrop(args) {
args.cancel = true;
//add a new node
diagram.add({ name: "firstNode", width: 100, height: 100, offsetX: args.element.offsetX, offsetY: args.element.offsetY });
}
Regards,
Shyam G