Allows the class to retarget the drop action.
- macOS 10.6+
The requested drop index.
The requested drop operation. The possible values are described in
Browser Drop Operation
For example, To specify a drop on the second item, one would specify index as
1, and operation as
IKImage. To specify a drop after the last item, one would specify index as the number of items and operation as
Passing a value of
IKImage as the operation causes the entire browser view to be highlighted rather than a specific item. This is useful if the data displayed by the receiver does not allow the user to drop items at a specific item location