Customize display of an enumeration class

I'd like to customize the display of an enumeration class using matlab.mixin.CustomDisplay .

If I have a regular (non-enumeration) class such as the following:

classdef test < handle & matlab.mixin.CustomDisplay
    properties
       value
    end
    methods
        function obj = test(value)
           obj.value = value;
        end
    end
    methods (Access = protected)
    function displayScalarObject(obj)
        disp(['hello ', num2str(obj.value)])
    end
    end
end

then everything works fine - for example,

>> a = test(1)
a = 
hello 1

But if I have an enumeration class such as the following (note the addition of the enumeration block):

classdef test < handle & matlab.mixin.CustomDisplay
    properties
       value
    end
    methods
        function obj = test(value)
           obj.value = value;
        end
    end
    methods (Access = protected)
    function displayScalarObject(obj)
        disp(['hello ', num2str(obj.value)])
    end
    end
    enumeration
        enum1(1)
    end
end

then the display is not customized - for example,

>> a = test.enum1
a = 
    enum1

Using the debugger, I can see that my displayScalarObject method is never called. Implementing other methods of matlab.mixin.CustomDisplay such as displayNonScalarObject and so on doesn't seem to help - these never get called either.

What's going on? Do disp and display work differently for enumeration classes, in such a way that anything that's overridden by matlab.mixin.CustomDisplay just gets ignored?

Is there a way to get a customized display with matlab.mixin.CustomDisplay , but using an enumeration class?

PS I am able to directly overload disp and/or display on an enumeration class that does not inherit from matlab.mixin.CustomDisplay , and this works fine. But I'm looking to use matlab.mixin.CustomDisplay if possible.

Answer 1

[Neha Talnikar]

I tried your code and run into the same issue. It seems that this cannot be done.

However, you can override the “disp” and/or “display” in an enumeration class and implement the required code in it.