User interface with stacked application management

1. A method for controlling a handheld computing device, comprising:

establishing a first application stack corresponding to one or more applications logically associated with a first display area of a touch-sensitive display of the handheld computing device, the touch sensitive display comprising the first display area and a second display area, wherein the first application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the first display area and further providing a relative order of displayed screens of the one or more applications logically associated with the first display area;

establishing a second application stack corresponding to one or more applications logically associated with the second display area of the touch-sensitive display of the handheld computing device, wherein the second application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the second display area and further provides a relative order of displayed screens of the one or more applications logically associated with the second display area, wherein the touch-sensitive display is foldable about a hinge, wherein the first display area is on a first side of the hinge, and wherein the second display area is on a second side of the hinge;

receiving a gesture input through the touch-sensitive display of the handheld computing device;

moving a first application belonging to the first application stack to the second application stack in response to receiving the gesture input such that the first application is logically associated with the second display area; and

reordering the displayed screens of the one or more applications of the second application stack such that displayed screens of the moved first application are at a top position in the second application stack.

2. The method according to claim 1 , wherein the first application comprises an actively displayed screen of the first display area prior to said moving and an actively displayed screen of the second display area after said moving, wherein an underlying screen is revealed in the first display after said moving, wherein the underlying screen comprises an application screen corresponding to a second application logically associated with the first display area such that the second application belongs to the first application stack.

3. The method according to claim 2 , wherein, after said moving, the first application obscures a second screen in the second display that comprises an actively displayed screen of the second display area prior to said moving, wherein the second screen comprises one of a desktop screen or an application screen corresponding to a second application of a second application stack.

4. The method according to claim 1 , wherein said moving further comprises expanding the first application to be the actively displayed screen of both the first display area and the second display area and wherein the first application belongs to the first application stack and the second application stack.

5. The method according to claim 1 , wherein the gesture input comprises a pin and drag gesture.

6. The method according to claim 1 , wherein the first application is revealed in the second display area after said moving.

7. The method according to claim 1 , wherein the first application is hidden in the second display area after said moving.

8. A handheld device comprising:

a touch-sensitive display comprising a first display area and a second display area, wherein the touch-sensitive display is foldable about a hinge between the first display area and the second display area;

a processor; and

a memory coupled with and readable by the processor and storing therein a set of instructions which, when executed by the processor, causes the processor to:

establish a first application stack corresponding to one or more applications logically associated with the first display area, wherein the first application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the first display area and further providing a relative order of displayed screens of the one or more applications logically associated with the first display area;

establish a second application stack corresponding to one or more applications logically associated with the second display area, wherein the second application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the second display area and further provides a relative order of displayed screens of the one or more applications logically associated with the second display area, wherein the first display area is on a first side of the hinge, and wherein the second display area is on a second side of the hinge;

receive a gesture input through the touch-sensitive display;

move a first application belonging to the first application stack to the second application stack in response to receiving the gesture input such that the first application is logically associated with the second display area; and

reorder the displayed screens of the one or more applications of the second application stack such that displayed screens of the moved first application are at a top position in the second application stack.

9. The handheld device according to claim 8 , wherein the first application comprises an actively displayed screen of the first display area prior to said moving and an actively displayed screen of the second display area after said moving, wherein an underlying screen is revealed in the first display after said moving, wherein the underlying screen comprises an application screen corresponding to a second application logically associated with the first display area such that the second application belongs to the first application stack.

10. The handheld device according to claim 9 , wherein, after said moving, the first application obscures a second screen in the second display that comprises an actively displayed screen of the second display area prior to said moving, wherein the second screen comprises one of a desktop screen or an application screen corresponding to a second application of a second application stack.

11. The handheld device according to claim 8 , wherein said moving further comprises expanding the first application to be the actively displayed screen of both the first display area and the second display area and wherein the first application belongs to the first application stack and the second application stack.

12. The handheld device according to claim 8 , wherein the gesture input comprises a pin and drag gesture.

13. The handheld device according to claim 8 , wherein the first application is revealed in the second display area after said moving.

14. The handheld device according to claim 8 , wherein the first application is hidden in the second display area after said moving.

15. A non-transitory, computer-readable medium comprising a set of instructions stored therein which, when executed by a processor, causes the processor to:

establish a first application stack corresponding to one or more applications logically associated with a first display area of a touch-sensitive display of the handheld computing device, the touch-sensitive display comprising the first display area and a second display area, wherein the first application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the first display area and further providing a relative order of displayed screens of the one or more applications logically associated with the first display area;

establish a second application stack corresponding to one or more applications logically associated with the second display area of the touch-sensitive display of the handheld computing device, wherein the second application stack comprises a data structure providing a logical representation of the one or more applications logically associated with the second display area and further provides a relative order of displayed screens of the one or more applications logically associated with the second display area, wherein the touch-sensitive display is foldable about a hinge, wherein the first display area is on a first side of the hinge, and wherein the second display area is on a second side of the hinge;

receive a gesture input through the touch-sensitive display;

move a first application belonging to the first application stack to the second application stack in response to receiving the gesture input such that the first application is logically associated with the second display area; and

reorder the displayed screens of the one or more applications of the second application stack such that displayed screens of the moved first application are at a top position in the second application stack.

16. The non-transitory, computer-readable medium according to claim 15 , wherein the first application comprises an actively displayed screen of the first display area prior to said moving and an actively displayed screen of the second display area after said moving, wherein an underlying screen is revealed in the first display after said moving, wherein the underlying screen comprises one of a desktop screen and an application screen corresponding to a second application logically associated with the first display area such that the second application belongs to the first application stack.

17. The non-transitory, computer-readable medium according to claim 16 , wherein, after said moving, the first application obscures a second screen in the second display that comprises an actively displayed screen of the second display area prior to said moving, wherein the second screen comprises one of a desktop screen or an application screen corresponding to a second application of a second application stack.

18. The non-transitory, computer-readable medium according to claim 15 , wherein said moving further comprises expanding the first application to be the actively displayed screen of both the first display area and the second display area and wherein the first application belongs to the first application stack and the second application stack.