Multifunction roller device and method for a control device for computer

Roll (105) for a control device for computers with: a roller wheel (300) having a ribbed surface (370); marked by a pivot arm (380) which is adapted to pivot in a first direction to engage the ribbed surface (370), and to pivot in a second direction to move from the ribbed surface (370) off; and with a driven power means (385) which is adapted to pivot the pivot arm (380), and wherein when said pivot arm (380) with the corrugated surface (370) is in contact, the roller wheel (300) is designed so that it is engaged by the pivot arm (380) and the corrugated surface (370) when the roller ( 105) is rotated, and wherein when the pivot arm (380) (of the corrugated surface 370) is moved away, the roller wheel (300) having an outer portion (350) which is formed of metal, due to its relatively large mass and / or be relatively large moment of inertia is adapted, following a user pushing force is applied to the roller wheel (300) to continue the rotation.