MATLAB Answers

App Designer class properties visibility

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Cristian Berceanu
Cristian Berceanu on 12 Sep 2019
Answered: Cristian Berceanu on 18 Sep 2019
Hi all,
I am just learning about classes in Matlab. This morning I had a custom class defined and when using an object of that class in App Designer I would get an interactive list of the objects properties after writing the '.' after the object name. Pretty much like you do for any control on the GUI (example):
However, for some reason, I stopped getting this list for my custom class. Not knowing the reason, I stripped the class down until the bear minimum, thinking it might be a parse problem in the class. But still no success. So eventually I tried the auto generated class template of Matlab and created a basic class called Class1 and tried to use this one in App Designer, but still, I get no interactive list of Properties. My class looks like this:
classdef Class1
properties (Access = public)
Property1
end
methods
function obj = Class1(inputArg1,inputArg2)
obj.Property1 = inputArg1 + inputArg2;
end
function outputArg = method1(obj,inputArg)
outputArg = obj.Property1 + inputArg;
end
end
end
And my app designer code looks like this (just a basic figure, with nothing added:
% Callbacks that handle component events
methods (Access = private)
% Code that executes after component creation
function startupFcn(app)
Module = Class1(1,2);
Module.
end
end
So at this point, I would expect after the '.' the list showing me 'Property1' to pop up, but it does not appear.
Any ideas? Thanks.

Answers (1)

Cristian Berceanu
Cristian Berceanu on 18 Sep 2019
I found it seems myself the answer to this question, I'll just post it here, in case others run in the same trouble. In order for the drop-down list of properties and methods to be available in Code View, you must fist declare the Module as a property of the app and indicate its class like this:
properties (Access = public)
Module Class1;
end
Then you can further use it in the code and access its public properties and methods:
Untitled.png
Best regards,
Cristian

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