Touch screen device capable of executing event based on gesture combination and operating method thereof

A method of operating a touch screen device capable of executing an event based on a gesture combination, the method comprising:

• maintaining a command database storing a plurality of predetermined gesture combinations, each of the gesture combinations including two or more gestures sequentially combined and a command corresponding to each of the plurality of predetermined gesture combinations;
• when two or more touch inputs are sequentially input to the touch screen at an interval within a predetermined time and an additional touch input is not input within the predetermined time after the two or more touch inputs are input, confirming a first gesture combination according to the two or more touch inputs based on a gesture corresponding to each of the two or more touch inputs;
• extracting a first command stored in correspondence with the first gesture combination from the command database;
• executing an event according to the extracted first command;
• tracking a trace of each touch input, generating free lines according to the trace of each touch input, and displaying the generated free lines on the touch screen whenever the two or more touch inputs are sequentially input to the touch screen at the interval within the predetermined time;
• and
• when the additional touch input is not input within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, informing execution of the event according to the first command by removing the free lines displayed on the touch screen,
• wherein the confirming of the first gesture combination includes:
• whenever the two or more touch inputs are sequentially input to the touch screen at the interval within the predetermined time, tracking the trace of each touch input, generating gesture information corresponding to each touch input based on the trace of each touch input, and then sequentially storing the gesture information corresponding to each touch input in a memory queue;
• and
• when the gesture information corresponding to each of the two or more touch inputs is stored in the memory queue, combining the gesture information corresponding to each of the two or more touch inputs stored in the memory queue in an order of the storage in the memory queue and generating the first gesture combination according to the two or more touch inputs,
• wherein the confirming of the first gesture combination further includes, whenever a first cancel touch input corresponding to predetermined first cancel gesture information is input for executing a cancel command for the touch input at the interval within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, deleting the gesture information corresponding to each of the two or more touch inputs stored in the memory queue one by one in an order opposite to the order, in which the gesture information corresponding to each of the two or more touch inputs is stored in the memory queue, and
• wherein the confirming of the first gesture combination further includes, when a second cancel touch input corresponding to predetermined second cancel gesture information is input for executing an input cancel command for the entire two or more touch inputs within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, deleting all of the gesture information corresponding to the two or more touch inputs stored in the memory queue.

A computer readable recording medium in which a program for executing a method of operating a touch screen device capable of executing an event based on a gesture combination is recorded, the method comprising:

• maintaining a command database storing a plurality of predetermined gesture combinations, each of the gesture combinations including two or more gestures sequentially combined and a command corresponding to each of the plurality of predetermined gesture combinations;
• when two or more touch inputs are sequentially input to the touch screen at an interval within a predetermined time and an additional touch input is not input within the predetermined time after the two or more touch inputs are input, confirming a first gesture combination according to the two or more touch inputs based on a gesture corresponding to each of the two or more touch inputs;
• extracting a first command stored in correspondence with the first gesture combination from the command database;
• executing an event according to the extracted first command;
• tracking a trace of each touch input, generating free lines according to the trace of each touch input, and displaying the generated free lines on the touch screen whenever the two or more touch inputs are sequentially input to the touch screen at the interval within the predetermined time;
• and
• when the additional touch input is not input within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, informing execution of the event according to the first command by removing the free lines displayed on the touch screen,
• wherein the confirming of the first gesture combination includes:
• whenever the two or more touch inputs are sequentially input to the touch screen at the interval within the predetermined time, tracking the trace of each touch input, generating gesture information corresponding to each touch input based on the trace of each touch input, and then sequentially storing the gesture information corresponding to each touch input in a memory queue;
• and
• when the gesture information corresponding to each of the two or more touch inputs is stored in the memory queue, combining the gesture information corresponding to each of the two or more touch inputs stored in the memory queue in an order of the storage in the memory queue and generating the first gesture combination according to the two or more touch inputs,
• wherein the confirming of the first gesture combination further includes, whenever a first cancel touch input corresponding to predetermined first cancel gesture information is input for executing a cancel command for the touch input at the interval within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, deleting the gesture information corresponding to each of the two or more touch inputs stored in the memory queue one by one in an order opposite to the order, in which the gesture information corresponding to each of the two or more touch inputs is stored in the memory queue, and
• wherein the confirming of the first gesture combination further includes, when a second cancel touch input corresponding to predetermined second cancel gesture information is input for executing an input cancel command for the entire two or more touch inputs within the predetermined time after the two or more touch inputs are sequentially input to the touch screen, deleting all of the gesture information corresponding to the two or more touch inputs stored in the memory queue.