Begins tracking mouse events within the receiver.
- macOS 10.0+
The initial location of the cursor.
NSControlobject managing the receiver.
true if the receiver is set to respond continuously or set to respond when the mouse is dragged, otherwise
NSCell implementation of
track invokes this method when tracking begins. Subclasses can override this method to implement special mouse-tracking behavior at the beginning of mouse tracking—for example, displaying a special cursor.