MATLAB: Notify event in a class

addlistenerclassnotifyoop

Hi guys,
I'm having some problems with event in classes. I have a class class like this:
classdef ClassA < handle
    properties
        prop
    end
    events
        EventA
    end
    methods
        function o = ClassA
            addlistener(o,'EventA',@o.callbackfun);
            
            o.prop = ClassB;
        end
        function callbackfun(o,~,~)
            % do something
        end
    end
end
and the ClassB like:
classdef ClassB < handle
    properties
        button
    end
    methods
        function o = ClassB
            fig = figure;
            o.button = uicontrol(fig,'Style','pushbutton','Callback',@(~,~,~) notify(ClassA,'EventA'));
        end
    end
end
And then, when I click the button, it opens a new figure. Like it was calling ClassA again. What I am doing wrong?
Thanks,

Best Answer

You are very close to having it working! In your Notify callback, you make a call to the constructor ClassA rather than a specifieid object of type ClassA. So you would give the argument to the ClassB constructor to pass an object of type ClassA and then reference that object instead of the class constructor:
classdef ClassB < handle
    properties
        button
    end
    methods
        function o = ClassB(classAObj)
            fig = figure;
            o.button = uicontrol(fig,'Style','pushbutton','Callback',@(~,~,~) notify(classAObj,'EventA'));
        end
    end
end
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