'father', 'son' and 'grandson'

GoXam
1

I’ve built a simple diagram with a sub-graph within a subgraph. The hierarchy is of 3 levels: ‘father’, ‘son’ and ‘grandson’.
When I drag the ‘father’ - only the ‘son’ moves with it, and when I drag the ‘son’ - the ‘grandson’ moves.
What do I need to do for the ‘grandson’ to move when dragging the ‘father’?

2

Really? That is not the normal behavior. You can try this, for example, in the Grouping sample of the GoWpfDemo.