like? Parameter for Copy/Paste architecture issue

[danielscottjames]

The problem is if you copy a node, delete that node, and try to paste. The like? parameter will reference a node that has been deleted from the core model.

The best solution I can think of is the drawableGraph emits a copied event. And the graphEditor holds on to the copied core elements.

Currently this fails quietly.

[cj-dimaano]

Right now, they way cut and copy work, is main tells the editor to save the current selection. I'm thinking we could do something similar with the graph controller--tell it to save the current selection, so that deleted elements don't get garbage collected if they're in the "clipboard".