MATLAB Object-Oriented Programming

3. A message is broadcast.


4. The callback function is executed.


5. A listener awaiting the message
   executes its callback.


6. The SetObservable attribute of Properties
   is set to Tr ue, so setting the property
   automatically triggers a PostSet event.
   Note that methods and events did not have
   to be declared in myfunceval.


7. New limits are assigned. myfunceval

Properties (SetObservable)

Lm

Listener

Properties

EventName = ‘PostSet’

FunctionHandle = @listenLm

myfuncview

Methods

listenLm

PostSet

obj.Lm = [-3 5];

Sequence During the Lm Property Assignment

The fcneval class defines a set function for the Lm property. When a value is assigned to
this property during object construction or property reassignment, the following
sequence occurs:

(^1) An attempt is made to assign argument value to Lm property.
(^2) The set.Lm method executes to check whether the value is in appropriate range — if
yes, it makes assignment, if no, it generates an error.
(^3) If the value of Lm is set successfully, MATLAB triggers a PostSet event.
(^4) All listeners execute their callbacks, but the order is nondeterministic.
Techniques for Using Events and Listeners