buttonMask
A bit mask identifying the buttons pressed for a tablet event.
Declaration
var buttonMask: NSEvent.ButtonMask { get }Discussion
Use one or more of the button-mask constants described in Getting Unicode Values to determine which of the pointing device’s buttons are pressed. This property is valid only for mouse events with a subtype of NSTabletPointEventSubtype and for events of type NSTabletPoint; otherwise, the property is set to 0.