| 摘要 |
PROBLEM TO BE SOLVED: To facilitate not only an addition operation but a subtraction operation in operations for inputting numerical values corresponding to display items in a numerical value input device.SOLUTION: An employee of a restaurant who operates an order input device (smartphone) touches (contacts) a menu button displayed on a touch panel of the order input device with a finger, etc. The order input device monitors whether or not the menu button is continuously contacted for predetermined time when touch by the finger of the employee (contact body) is detected, when it is determined that the menu button is in a state of being contacted for the predetermined time, stores a position where the finger contacts on the touch panel. The employee moves (swipes) the contacting finger in a left direction toward a picture by a predetermined amount as holding a contact state between the touch panel and the finger. The order input device displays a numerical value by subtracting an amount of 1 from a numerical value being displayed on the menu button when travel amount of the finger contacting the menu button is equal to or more than a predetermined threshold.SELECTED DRAWING: Figure 4 |
