If set, this delegate is called before popping up the window. This gives you a chance to prepare your dynamic data structures for the element(s) selected.
For example, if your MenuPopupButton is attached to a GenericListViewItem, you can call GenericListViewItem.currentIndexLoaded in here and set it to a variable in the object you called createContextMenuFromAnnotatedCode to apply the operation to the right object.
(The api could probably be simpler...)
See Implementation
If set, this delegate is called before popping up the window. This gives you a chance to prepare your dynamic data structures for the element(s) selected.
For example, if your MenuPopupButton is attached to a GenericListViewItem, you can call GenericListViewItem.currentIndexLoaded in here and set it to a variable in the object you called createContextMenuFromAnnotatedCode to apply the operation to the right object.
(The api could probably be simpler...)