An electronic device, in response to detecting a touch input on a touch-sensitive surface, determines an intensity of the touch input. In accordance with the intensity of the touch input on the touch-sensitive surface and one or more preselected intensity thresholds, the device determines an intensity stage of the touch input and one or more intensity-based progress values of the touch input, based on an intensity range associated with the determined intensity stage. The device sends touch information to a first software application stored by the electronic device, including the one or more intensity-based progress values of the touch input and information identifying the intensity stage of the touch input, and processes the touch input based on the one or more intensity-based progress values of the touch input and the intensity stage of the touch input.