Content navigation and zooming on a mobile device

摘要

The contents displayed on the touch screen of a mobile device are modified based in user input, in the form of touch input. In one mode, a content view, contents of a document are displayed to a user at various zoom levels. The user can zoom-out by indicating in one embodiment a pinching touch motion. The user can also switch to another viewing mode, a structure view, where structure of the document is displayed to the user, potentially at various zoom levels. The user can zoom-out in the structure view also by providing a pinching touch motion. The user can switch to the content view by selecting text in the structure view, which then presents the contents of the document at the corresponding location.

主权项

1. A method for an application program to modify information displayed on a device, comprising:
displaying on the device by the application program at least a first portion of a document at a first content zoom level; receiving on the device a first input from a user; responsive to receiving the first input, retrieving from a memory in the device document-related structure data associated with the document, the document-related structure data being derived from text within the document corresponding to at least one of a heading, a title or a table of contents; displaying on the device by the application program an outline having a primary level of information based on at least a first portion of the document-related structure data corresponding to the first content zoom level, the outline replacing the display of at least the first portion of the document; receiving on the device a second input from the user comprising a request to display a secondary level of information based on at least a second portion of the document-related structure data; and displaying on the device the secondary level of information within the displayed outline based on the request to display the secondary level of information.