MATLAB: How to pass a superclass method as a calback

callbackclassinheritancesuperclass

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

Best Answer

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.

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MATLAB: Listener callback execution error

Since handleEvnt is a method of the class RespondToToggle its first argument will be an object of type RespondToToggle. In addition, it will receive two arguments from the event, the object that triggers the event, and the event argument. Thus, the signature of the event handler should be:

function handleEvnt(obj, toggle_button_obj, ~) %obj could be replaced by ~

sidenote: for a proper OOP design State should have private write access.

MATLAB: Super class get callers name

Found it. Just call this:

 me = class(obj);

this gives the name of the created subclass. I call it in the constructor of the superclass:

 function obj = mySuperClass() %constructor
   me = class(obj);
   obj.name = me;
 end

Best Answer

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