Autocomplete triggers PreGet and PostGet events

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Christian Vetter 2020-4-15

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https://ww2.mathworks.cn/matlabcentral/answers/518155-autocomplete-triggers-preget-and-postget-events

编辑： Christian Vetter 2020-4-15

Hi everyone,

I just observed a very strange behavior, which I do not understand. If I implement a PreGet or PostGet listener, an event is triggered every time I want to use the autocompletion via the tab key. Here is a minimum example

classdef minimal < handle
    properties (GetObservable)
        prop
    end
    
    methods
        function obj = minimal()   
            obj.prop = randn(1);
            addlistener(obj,'prop','PreGet',@obj.handlePreGet);
        end
        
        function handlePreGet(~, ~, ~)
            disp('PreGet')
        end
        
           
    end
end

And here is my output by just pressing <tab> a few times

>> B = minimal
B = 
PreGet
  minimal with properties:
    prop: 0.2696
PreGet
PreGet
PreGet
PreGet
PreGet
PreGet
>> B.

Can anyone explain to me why this is happening and if it can be avoided?

Thanks a lot!

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