| 主权项 |
1. A user-interface for a data processing system, the user-interface comprising a joystick configured for manually controlling input to the data processing system, the joystick comprising:
a single tilt sensor having associated therewith a reference axis and a reference plane orthogonal to the reference axis, the tilt sensor being enabled for assuming tilted positions by being inclined away from the reference axis in corresponding directions, the corresponding directions lying in the reference plane, and a sensor configured for sensing at succeeding sampling moments the direction corresponding to succeeding tilted positions of the tilt sensor, a difference determination device configured for determining a difference in direction between a first direction sensed at a first sampling moment and a second direction sensed at a second sampling moment after the first moment, a parameter modifier configured for modifying a parameter value of a parameter of the data processing system by adding or subtracting a difference value, the difference value depending upon the difference in direction; and wherein the user-interface is switchable between a pointing-mode configured to move a pointer to a set of display coordinates in response to movement of the single tilt sensor, and a rotational-mode configured to increment or decrement a non-display coordinate parameter of the data processing system in response to movement of the single tilt sensor. |
