Method and apparatus for displaying user interface through sub device that is connectable with portable electronic device

1. A display method using a sub device connectable with a portable electronic device, the display method comprising:

executing by the portable electronic device, an application to display a working region of the application on a display of the portable electronic device;

detecting, by the portable electronic device, a first user input for displaying a popup menu being provided by the executing application on the sub device;

generating, by the portable electronic device, configuration information corresponding to the popup menu according to at least one of a display shape, a display size, or a display resolution of the sub device;

transmitting, by the portable electronic device, the configuration information corresponding to the popup menu to the sub device;

receiving, from the sub device, user input data corresponding to a second user input detected on the popup menu that is displayed on the sub device; and

controlling execution of the application on the display of the portable electronic device in response to the received user input data,

wherein the application is an image editing application, and

wherein the popup menu comprises at least one of a brush setting menu generated by the image editing application that is being executed on the portable electronic device.

2. The display method of claim 1 , further comprising obtaining screen information corresponding to the display shape, the display size, and the display resolution of the sub device, from at least one of the sub device or a network entity.

3. The display method of claim 1 , wherein the user input data comprises coordinate information indicating a position where the user input is detected on the popup menu or indicates a command corresponding to the user input.

4. The display method of claim 1 , further comprising:

receiving an interaction request for use of the sub device as a sub user interface from the sub device; and

notifying the sub device of an interaction permission.

5. The display method of claim 1 , further comprising:

if the application supports a sub user interface mode, determining whether the sub device is available as the sub user interface; and

sending the interaction request to the sub device.

6. A method for displaying a popup menu, which is displayable on a portable electronic device, on a sub device, the method comprising:

receiving, from the portable electronic device, configuration information corresponding to a popup menu provided by an application that is being executed on the portable electronic device;

displaying the popup menu on a display screen of the sub device based on the configuration information;

detecting a user input on the popup menu displayed on a display screen of the sub device; and

transmitting user input data corresponding to the detected user input to the portable electronic device,

wherein the configuration information is configured by the portable electronic device according to at least one of a display shape, a display size, or a display resolution of the sub device before transmitting to the sub device, and

wherein the application is an image editing application, and the popup menu comprises at least one of a brush setting menu generated by the image editing application that is being executed on the portable electronic device.

7. The method of claim 6 , further comprising transmitting information corresponding to the display shape, the display size, and the display resolution of the sub device to the portable electronic device.

8. The method of claim 6 , wherein the user input data comprises coordinate information indicating a position where the user input is detected on the popup menu or indicates a command corresponding to the user input.

9. The method of claim 6 , further comprising:

sending an interaction request for preferential use of the sub device as a sub user interface of the portable electronic device in the sub device to the portable electronic device; and

receiving an interaction permission from the portable electronic device.

10. The method of claim 6 , further comprising receiving an interaction request for use of the sub device as a sub user interface of the portable electronic device from the portable electronic device.

11. A portable electronic device for displaying a popup menu through a sub device, the portable electronic device comprising:

a display screen configured to display information generated by an application that is being executed;

at least one processor configured to:

execute an application to display a working region of the application on a display of the portable electronic device,

detect a first user input for displaying a popup menu being provided by the executed application on the sub device,

generate configuration information corresponding to the popup menu according to at least one of a display shape, a display size, or a display resolution of the sub device, and

control execution of the application on the display of the portable electronic device in response to a second user input detected on the popup menu; and

a transceiver configured to:

transmit the configuration information to the sub device, and

receive user input data from the sub device corresponding to the second user input detected on the popup menu that is displayed on the sub device,

wherein the application is an image editing application, and the popup menu comprises at least one of a brush setting menu generated by the image editing application that is being executed on the portable electronic device.

12. The portable electronic device of claim 11 , wherein the user input data comprises coordinate information indicating a position where the user input is detected on the popup menu or indicates a command corresponding to the user input.

13. The portable electronic device of claim 11 , wherein the at least one processor is further configured to obtain screen information corresponding to the display shape, the display size, and the display resolution of the sub device, from at least one of the sub device or a network entity.

14. A sub device for displaying a popup menu that is displayable on a portable electronic device, the sub device comprising:

a display screen;

a transceiver configured to:

receive, from the portable electronic device, configuration information corresponding to a popup menu provided in an application that is being executed on the portable electronic device, and

transmit user input data corresponding to a user input detected on the popup menu displayed on the display screen of the sub device to the portable electronic device; and

at least one processor configured to:

display the popup menu on the display screen based on the configuration information, and

generate the user input data corresponding to the detected user input if detecting the user input on the popup menu displayed on the display screen,

wherein the user interface configuration information is configured by the portable electronic device according to at least one of a display shape, a display size, or a display resolution of the sub device before transmitting to the sub device, and

wherein the application is an image editing application, and the popup menu comprises at least one of a brush setting menu generated by the image editing application that is being executed on the portable electronic device.

15. The sub device of claim 14 , wherein the user input data comprises coordinate information indicating a position where the user input is detected on the popup menu or indicates a command corresponding to the user input.

16. The sub device of claim 14 , wherein the transceiver is further configured to transmit information corresponding to the display shape, the display size, and the display resolution of the sub device to the portable electronic device.