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trackingNumber

The identifier of a mouse-tracking event.

Declaration

var trackingNumber: Int { get }

Discussion

This property contains either an NSTrackingArea object or an NSView.TrackingRectTag constant, depending on how AppKit generated the event. Valid mouse-tracking event types are NSMouseEntered, NSMouseExited, and NSCursorUpdate. For other types of events, accessing this property raises internalInconsistencyException.

See Also

Related Documentation

Getting tracking area information