US Patent 8661363 Application programming interfaces for scrolling operations

A method performed at an electronic device that has one or more processors, memory, and a touch-sensitive display includes transferring a set bounce call to provide a bounce operation. Transferring the set bounce call causes a bounce of a scrolled content region in an opposite direction of a scroll. The scrolled region includes an information object that bounces in the opposite direction of the scroll when the information object reaches or intersects a terminus, and the scrolled content region has a first velocity before the bounce and a second velocity, distinct from the first velocity, after the bounce.