called during drag-n-drop, when some item of the component should be marked as an active drop target
context | object | a drag-n-drop context |
ev | Event | a native HTML event |
boolean | returning false will prevent a drag operation |
The method isn't purposed for direct call! It is an extension point.
You can override it with your own logic, but check drag-n-drop related events first, as they provide a much more convenient way of drag-n-drop handling.
The drag-and-drop context can have the following properties: