| 摘要 |
Computer-readable media, computerized methods, and computer systems for intuitively invoking a presentation action (e.g., rendering a menu) by applying a drag-operation at a top-level control button rendered at a touchscreen display are provided. Initially, aspects of a user-initiated input applied at the top-level control button are detected. These aspects may include an actuation location and a distance of a drag-movement therefrom. If a distance of the drag-movement at the touchscreen display is greater than a threshold distance in a particular radial direction from the actuation location, the user-initiated input is considered a drag-operation. Typically, a set of trigger boundaries are constructed based on system metrics to assist in disambiguating the drag-operation from a tap-type operation. If a drag-operation is identified, the presentation action is invoked; otherwise, a principle action associated with the top-level control button (e.g., manipulating content of an application) may be invoked. |
