Touch screen device, method, and graphical user interface for determining commands by applying heuristics

A computer-implemented method, comprising:

• at a computing device with a touch screen display,
• detecting one or more finger contacts with the touch screen display;
• applying one or more heuristics to the one or more finger contacts to determine a command for the device;
• and
• processing the command;
• wherein the one or more heuristics comprise:
• a vertical screen scrolling heuristic for determining that the one or more finger contacts correspond to a one-dimensional vertical screen scrolling command rather than a two-dimensional screen translation command based on an angle of initial movement of a finger contact with respect to the touch screen display;
• a two-dimensional screen translation heuristic for determining that the one or more finger contacts correspond to the two-dimensional screen translation command rather than the one-dimensional vertical screen scrolling command based on the angle of initial movement of the finger contact with respect to the touch screen display;
• and
• a next item heuristic for determining that the one or more finger contacts correspond to a command to transition from displaying a respective item in a set of items to displaying a next item in the set of items.

A computer readable storage medium having stored therein instructions, which when executed by a device with a touch screen display, cause the device to:

• detect one or more finger contacts with the touch screen display;
• apply one or more heuristics to the one or more finger contacts to determine a command for the device;
• and
• process the command;
• wherein the one or more heuristics comprise:
• a vertical screen scrolling heuristic for determining that the one or more finger contacts correspond to a one-dimensional vertical screen scrolling command rather than a two-dimensional screen translation command based on an angle of initial movement of a finger contact with respect to the touch screen display;
• a two-dimensional screen translation heuristic for determining that the one or more finger contacts correspond to the two-dimensional screen translation command rather than the one-dimensional vertical screen scrolling command based on the angle of initial movement of the finger contact with respect to the touch screen display;
• and
• a next item heuristic for determining that the one or more finger contacts correspond to a command to transition from displaying a respective item in a set of items to displaying a next item in the set of items.