Abstract: At least certain embodiments of the present disclosure include an environment with user interface software interacting with a software application. A method for operating through an application programming interface (API) in this environment includes transferring a scroll hysteresis call to determine whether a user input invokes a scroll. The method further includes setting a hysteresis value for determining whether a user input invokes a scroll.

Abstract: A portable device with a touch screen display detects a finger-in-contact or finger-in-range event at a first position on the touch screen display and a finger-out-of-range event at a second position on the touch screen display and then determines a distance between the first position and the second position. Next, the portable device identifies a user interface object associated with the first position, which includes a slide bar and a slide object, and moves the slide object along the slide bar in accordance with the distance between the first position and the second position.

Abstract: A computer-implemented method for use in conjunction with a computing device with a touch screen display comprises: 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. The one or more heuristics comprise: a heuristic for determining that the one or more finger contacts correspond to a one-dimensional vertical screen scrolling command, a heuristic for determining that the one or more finger contacts correspond to a two-dimensional screen translation command, and a 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.

Abstract: A portable electronic device with a touch-sensitive display is disclosed. One aspect of the invention involves a computer-implemented method in which the portable electronic device: displays an application on the touch-sensitive display; and when the application is in a predefined mode, performs a predefined operation in response to each gesture of a set of multiple distinct gestures on the touch-sensitive display. Another aspect of the invention involves a computer-implemented method in which the portable electronic device: displays a first application; when the first application is in a first mode, performs a first operation upon detecting a first gesture on the touch-sensitive display; and performs the first operation upon detecting a second gesture on the touch-sensitive display, wherein the second gesture is different from the first gesture.

Abstract: In one aspect of the invention, a computer-implemented method is disclosed for use in conjunction with a portable electronic device with a touch screen display. A list of items comprising missed telephone calls is displayed. Upon detecting user selection of an item in the list, contact information is displayed for a respective caller corresponding to the user selected item. The displayed contact information includes a plurality of contact objects that include a first contact object, comprising a telephone number object having a first telephone number associated with the missed telephone call, and a second contact object. Upon detecting user selection of the second contact object, a communication with the respective caller is initiated via a modality corresponding to the second contact object.

Abstract: A portable electronic device for instant messaging is disclosed. One aspect of the invention involves a graphical user interface (GUI) on a portable electronic device with a touch screen display. The GUI has a set of messages exchanged between a user of the device and another person. The set of messages are displayed in a chronological order. In response to detecting a scrolling gesture comprising a substantially vertical movement of a user contact with the touch screen display, the display of messages are scrolled in accordance with a direction of the scrolling gesture. The detecting of the scrolling gesture is substantially independent of a horizontal position of the user contact with the touch screen display.

Abstract: A plurality of icons are displayed on a touch-sensitive display. A respective icon in the plurality of icons corresponds to at least one symbol. An actual contact by a user with the touch-sensitive display is detected. An estimated contact that corresponds to the respective icon and at least the one symbol in accordance with the actual contact and a pre-determined offset is determined. A magnitude of the pre-determined offset corresponds to a difference between the actual contact and the estimated contact. One or more corrections for one or more errors in one or more selected symbols are received. The offset for at least the respective icon is modified in accordance with the one or more received corrections.

Abstract: A plurality of icons are displayed on a touch-sensitive display. A respective icon in at least a subset of the plurality of icons corresponds to two or more symbols. A contact by a user with the touch-sensitive display that corresponds to the respective icon is detected. A respective symbol in the two or more symbols to which the contact further corresponds is determined. The displayed respective icon is modified to indicate that the contact corresponds to the respective symbol.