Draw edge to nested node from other hierarchy level

I’m submitting a…

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[X] Feature request
[ ] Documentation issue or request
[] Other... Please describe:

Is there a way to draw edges to nested nodes as in the elk docs?

Current behavior

Providing the nested node as edge target does not work - the edge will not show.

Expected behavior

Would be best to just provide the id of the node and edges are automatically also drawn towards nested elements.

Example

nodes={[
  {
    id: '1',
    text: '1'
  },
  {
    id: '2',
    text: '2'
  },
  {
    id: '2.1',
    text: '2.1',
    parent: '2'
  },
  {
    id: '3',
    text: '3'
  }
]}
edges={[
  {
    id: '1-2',
    from: '1',
    to: '2.1'
  },
  {
    id: '2-3',
    from: '2',
    to: '3'
  }
]}

What is the motivation / use case for changing the behavior?

I would like to display nested nodes within one node and nodes from the “outside” should directly impact these nested nodes. Therefore, I need to display a direct edge towards the nested nodes.

Since we provide a parents (and no children) property, maybe we should resolve this by using the id of the nested node directly. ELKs approach is to traverse by the parents until the child is reached like edge source -> outside.inside.n1, but i think their approach is not feasible for us, no?

@amcdnl could you share some thoughts on this? If you think this is a good “first ticket”, i will try to implement it.

[ASchwad]

Created these issues: #31 #32

[ASchwad]

@amcdnl thank you so much! 🎉 I did not notice so far, that edges have a parent property as well.

So I will extract the other two problems into separate issues and create a storybook story for my example from above - then we can close this issue.