1. A system comprising: a processing subsystem; and an input device configured to communicate with the processing subsystem and comprising at least one sensing facility and a control facility, the at least one sensing facility configured to detect a first type of user input and a second type of user input, and the control facility communicatively coupled to the sensing facility and configured to provide a first control signal in response to detection of the first type of user input, and provide a second control signal in response to detection of the second type of user input; wherein the processing subsystem is configured to execute a function associated with the sensing facility in response to the second control signal; and provide a preview event for the function in response to the first control signal.