Patent ID: 7321357

Claim:
An input device comprising: a roller wheel configured to be rotated by a user; an encoder configured to encode rotations of the roller wheel; a first sensor coupled to the roller wheel, wherein the first sensor is configured to control the encoder to scroll a graphical object along a first axis if the first sensor is in a first state, and the first sensor is configured to control the encoder to scroll the graphical object along a second axis if the first sensor is in a second state; and a second sensor configured to change an operational characteristic of the input device from a first characteristic to a second characteristic if the second sensor is activated by the user pressing on the roller wheel, wherein the second sensor has a first state and a second state, and wherein the first mentioned sensor is configured to enter its second state if the roller wheel is pressed down a first distance by the user, and the second sensor is configured to enter its second state if the roller wheel is pressed down a second distance greater than the first distance.