User interface for a mobile device

1. A method for controlling a user interface of a mobile device configured to support multiple tasks, the method comprising:

detecting a lateral movement of the mobile device, the lateral movement being parallel to a display unit of the mobile device;

seamlessly switching a displayed active task window according to the detected lateral movement of the mobile device, from a first active task window to a second active task window,

wherein the second active task window corresponds to one active task window provided in a direction of the detected lateral movement of the mobile device, among one or more active task windows adjacent to the first active task window in a two-dimensional virtual arrangement having a plurality of virtually arranged active task windows, and

wherein the two-dimensional virtual arrangement is maintained even though the direction of the detected lateral movement points to the vertical direction and even though the direction of the detected lateral movement points to the horizontal direction while switching the displayed active task window from the first active task window to the second active task window according to the detected lateral movement; and

seamlessly switching the displayed active task window from the second active task window to the first active task window upon detecting another lateral movement whose direction is opposite to the detected lateral movement.

2. The method according to claim 1 , further comprising:

detecting a pitching gesture; and

zooming in or out some or all of the plurality of virtually arranged active task windows according to the pitching gesture.

3. The method according to claim 1 , further comprising:

closing all of the plurality of virtually arranged active task windows in response to a certain movement of the mobile device as applied by a designated gesture of the user.

4. The method according to claim 3 , wherein the designated gesture includes shaking the mobile device at least once.

5. A mobile device for controlling a user interface, the mobile device configured to support multiple tasks and comprising:

a display unit;

a detector configured to detect a lateral movement of the mobile device, the lateral movement being parallel to the display unit; and

a controller, by controlling the display unit, configured to

seamlessly switch a displayed active task window, according to the detected lateral movement of the mobile device from a first active task window to a second active task window,

wherein the second active task window corresponds to one active task window provided in a direction of the detected lateral movement of the mobile device, among one or more active task windows adjacent to the first active task window in a two-dimensional virtual arrangement having a plurality of virtually arranged active task windows, and

wherein the two-dimensional virtual arrangement is maintained even though the direction of the detected lateral movement points to the vertical direction and even though the direction of the detected lateral movement points to the horizontal direction while switching the displayed active task window from the first active task window to the second active task window according to the detected lateral movement,

seamlessly switch the displayed active task window from the second active task window to the first active task window upon detecting another lateral movement whose direction is opposite to the detected lateral movement.

6. The method according to claim 1 , further comprising:

determining whether a gesture by the user for activating a gesturing mode of the mobile device is made,

wherein the seamlessly switching of the displayed active task window comprises:

seamlessly switching the displayed active task window to the different active task window according to the detected lateral movement of the mobile device when the mobile device is in the gesturing mode.

7. The mobile device according to claim 5 ,

wherein the controller determines whether a gesture by the user for activating a gesturing mode of the mobile device is made, and seamlessly switches the displayed active task window to the different active task window according to the detected lateral movement of the mobile device when the mobile device is in the gesturing mode.