Patent ID: 8683345

Claim:
A method for displaying a graphic user interface at a control apparatus connected to a local network, the method comprising: displaying a place selection menu for selecting a place in which at least one multimedia device is located; displaying, upon selection of the place from the place selection menu, a player selection menu including a player list of at least one player located in the selected place; displaying, upon selection of the player from the player list of the player selection menu, a source selection menu including a source list of at least one a source capable of outputting contents to the selected player while displaying at least one locking menu for setting a locking function corresponding to each of the selected player from the player selection menu and the at least one source from the source list; displaying a list of contents available from a source selected from the source list of the source selection menu; and controlling connection between the selected source and the selected player, upon selection of the list of contents, wherein the locking function includes a control locking function for disabling at least one of the player and the source from being controlled, wherein when the control locking function of a player from among the at least one player in the player list is already locked by another control apparatus when the player selection menu is displayed, the player whose control locking function is locked is displayed as being unavailable for selection in the player list, and wherein when the control locking function of a source from among the at least one source in the source list is already locked by another control apparatus when the source selection menu is displayed, the source whose control locking function is locked is displayed as being unavailable for unlock of the control locking function in the locking menu.