Element: signal.raise ( )
Element: signal.raise ( )numeric func
A function to raise a signal, thereby invoking callbacks for all listeners to the signal.
The number of callbacks executed is returned when successful; -1 is returned on error.
The code of the function cannot be redefined.
<signal>.raise (<object>,<data>)
e.g.
mysig.raise(myobj,'text value')
Where myobj is a generic identifier associated with the raising of the signal, and 'text value' is a generic parameter. Both these, together with the signal name, are then passed to the callbacks of all objects listening for this signal.
The invocation of such a listener callback would take the following form:
<listener>.<callback>(mysig,myobj,'text value')
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