Patent US 9,720,594

A device with a touch-sensitive surface detects a touch on the touch-sensitive surface, determines that the touch is cancelled, and in accordance with a determination that the touch is cancelled, sends a touch cancel event to at least one of the one or more applications. Also disclosed is a device configured to determine that a respective touch has been cancelled by the device. If the respective touch has been cancelled, the device ignores the respective touch. If the respective touch has not been cancelled, the device processes the respective touch. In addition, a device configured to detect one or more touches and process at least a subset of the touches with at least one application is described. While processing at least a subset of the touches, the device receives a touch cancel event, and, in response to receiving the touch cancel event, ignores the touches.