Touch panel device, touch panel device control method, program, and storage medium storing the program

A method for controlling a touch panel device configured to allow a user to perform a multi-touch operation, the touch panel device including a touch panel configured to output signals corresponding to positions touched by operating members, the method comprising:

• an operation position obtaining step of obtaining, as operation positions of the operating members, positions on the touch panel that are touched by the operating members, the positions on the touch panel being determined based on the signals outputted from the touch panel;
• an intersection determination step of, when input is given by the multi-touch operation, determining whether a first path and a second path intersect each other, the first path being a path of the operating position of one operating member of the operating members, the second path being a path of the operation position of another operating member of the operating members;
• and
• a correction step of, when a determination that the first path and the second path intersect each other is made, substituting the operation position of the one operating member obtained by the operation position obtaining step for the operation position of the other operating member, and substituting the operation position of the other operating member obtained by the operation position obtaining step for the operation position of the one operating member.