Set to true to cancel the operation
OptionalCancelOptional reason for cancellation (for logging/debugging)
ReadonlyCurrentThe currently focused node (if any)
ReadonlyKeyThe key that was pressed
ReadonlyKeyboardThe keyboard event
ReadonlyTargetThe node that will be focused
ReadonlyTimestampTimestamp when event was raised
ReadonlyTreeThe tree component that raised the event
Fired before keyboard navigation - can be canceled