Editing WoW:SecureStateDriver (section)

==API==
There are two functions provided by the Secure State Driver API: RegisterUnitWatch is the unit-frame special case, and RegisterStateDriver is the generic implementation.

'''RegisterStateDriver'''(frame, stateid, conditional)
: Is the generic state driver -- you can register to be notified when an arbitrary macro conditional evaluates to a different values. Updates are delivered via attributes; handle OnAttributeChanged or use [[SecureHandlerStateTemplate]] with a corresponding snippet to respond from a restricted environment.
:; frame : Frame-derived widget - notifications will be delivered to this frame.
:; stateid : String - an arbitrary identifier string for this conditional (coerced into lower case), or "visibility". The latter is a special state -- rather than delivering an update through attribute changes, it shows and hides the frame when the conditional evaluates to "show" or "hide" respectively.
:; conditional : String - macro conditional parsable by {{api|SecureCmdOptionParse}}. The value this conditional evaluates to will be set as the value of the "state-''stateid''" attribute on the frame.

'''RegisterUnitWatch'''(frame, asState)
: Assists in controlling unit frames -- can either show/hide the frame based on whether its unit exists; or deliver that information via a state attribute.
:; frame : Frame-derived widget - The frame to be shown/hidden/notified when its unit exists / does not exist.
:; asState : Boolean - if true, the "state-unitexists" attribute will be set to a boolean value denoting whether the unit exists; if false, the frame will be shown if its unit exists, and hidden if it does not.