I have an Eclass that has an Ereference with containment to a list of a different Eclass. Similar to the Thread/Threaditems mindmap example.

Rather than having the creation of the child class from the palette, I would like to manage the add/delete of the children
in the property sheet of the parent class.

I would like to not have the children drawn inside the parent diagram. (there might be too many instances to show the information).

I did make a change to the getPropertyDescriptors of the parent provider class to show the children item descriptors in the parent property sheet

Is there a way I can add either a menu action or a button to the property sheet to add a child?

Or another option I thought of was to create a Dialog. and have a button in the property sheet. (I don't know yet how to do this either).

In particular I want one that has the choices, up/down add/remove. Similar to the one that is generated for you when you have a eclass with an ereference to a list of objects already created. But this still would not create a new instance.

Any suggesstions would be appreciated.
Thanks