Informs the receiver that the mouse cursor has moved into a cursor rectangle.
- macOS 10.5+
An object encapsulating information about the cursor-update event (
Override this method to set the cursor image. The default implementation uses cursor rectangles, if cursor rectangles are currently valid. If they are not, it calls
super to send the message up the responder chain.
If the responder implements this method, but decides not to handle a particular event, it should invoke the superclass implementation of this method.