How to pass a superclass method as a calback?

Does anybody know how to pass a superclass function as a calback?

For example a button callback:

    btn = uicontrol('Style', 'pushbutton', 'String', 'Example',...
        'Position', [20 20 50 20],...
        'Callback', @(~, ~)methodFromSuperclass@superclass(obj));

But this one gives an error:

"@" Within a method, a superclass method of the same name is called by saying method@superclass.  The left operand of "@" must be the method name.

Thanks, Mario

Answer 1

[Mario Koddenbrock]

Okay I found the solution:

    btn = uicontrol('Style', 'pushbutton', 'String', 'Example',...
        'Position', [20 20 50 20],...
        'Callback', @(~, ~)obj.methodFromSuperclass());

if the methodFromSuperclass is not used in the subclass.

[Guillaume]

Yes, the @ syntax is only used

• in the constructor when you want to call the superclass constructor
• in a class method when you want to invoke a superclass method that has been overriden in the class.

It is never used by a user of the class. The whole point of inheritance is that all methods from all superclasses appear as normal methods of the derived class, so from a user point of view, either

obj.inheritedmethod()  %dot notation

or

inheritedmethod(obj)   %functional notation

works.