NodeEditor : Prevent multiple link connections to an input attribute

[EssenOH]

Is your feature request related to a problem? Please describe. For the node connection cases with link, current DPG allows input connection from multiple nodes.

Describe the solution you'd like the node connections, it should support 1:N attribute connections, but it should not allow N:1 connections. if a node wants to get multiple inputs, each attribute should be a dedicated attribute and it should allow connecting with only single link.

[v-ein]

If I remember correctly, DPG itself doesn't add links, it only notifies your program that the user dragged a link onto an attribute - by calling a callback provided by you. Can't you just ignore excessive link calls in your callback? That is, instead of creating the link right away, first check whether the attribute has already got another link.

[EssenOH]

Gotcha!... thanks for your quick insight I fixed it with adding a check routine whether the input attribute is already occupied or not.