| 摘要 |
A computing device comprising a touch sensitive screen configured to display a graphical representation of a user interface wherein the user interface includes an orbital touch control. The orbital touch control is configured to move in an angular direction and in a radial direction relative to a reference point in response to user interaction with the orbital touch control, in response control signals for controlling parameters are generated. The control signals include an indication of values of first and second parameters, the value of the first parameter being dependent on an angular touch position of the orbital touch control relative to the reference point and the value of a second parameter being dependent on a radial touch position of the orbital touch control relative to the reference point. |
