UIHANDLER OnShow

Fires when a widget appears.
 (self)
== Arguments ==
; self : - The appearing widget.
== Description ==
* The OnShow event is called when a hidden frame is about to become visible on screen.
* Normally requires the frame to have previously been hidden; i.e. repeated calls to () are ignored.
* However, if a frame is defined in XML then OnShow also fires after unless hidden at the time.
== See also ==
*