| 摘要 |
A computer program executable on a portable electronic device having a touch screen sensor is provided. The computer program may include an input mode switching module configured to receive a mode switch user input to switch between a direct input mode and a relative gesture recognition mode. The computer program may further include a gesture-based control module configured, in the relative gesture recognition mode, to recognize a contact point on the touch screen sensor between a digit of a user and a surface of the touch screen sensor in a defined region in which the graphical user interface elements are unselectable, and to identify a detected gesture based on user touch input originating from the contact point, and to send a message to an application program to adjust an operation of the portable electronic device based on the detected gesture. |
