RegParTrace()
Register a function depending on a parameter.
Usage
RegParTrace( path, par,
func, args )Parameters
- path (string)
- Data base path of the node containing the parameter.
- par (string)
- Parameter name.
- func (function)
- Name of the function to be registered.
- args (tuple)
- Tuple of function arguments.
Return Value
None
Errors
- The function must already be defined.
- The parameter must exist in the data base.
- All of the arguments (path, par, func, args) must not be None.
Description
This routine registers a function in order to call it later based on a parameter. The function
will be called when the parameter value changes in
the data base. The function name is given by
func and the function's
arguments are given by args.
The parameter path in the data base and it's name
are given by path and
par, respectively. For
example,
nodeEbc= nodeTmp + RS + item.name
RegParTrace( path = nodeEbc, par = 'active',
func = newItem.toggleState, args = None )