import struct as property in App Designer

I'd like to load a struct as a .mat file into my app, input values and then save changes. I'd like to import it as a property. I can do it using:

properties (Access = private)
    myStruct
end

And then loading it on startup:

function startupFcn(app)
    myStruct = load('DemoStruct.mat');
end

This works and I am able to edit and save the struct, but I don't get the option of autocomplete when using app.myStruct. as a way to access the fields in the struct. Is there any way to do this? The only way I can get it to work is by manually typing and this is a pain when there are many fields and indexes at play.

Answer 1

[Prajith Chilummula]

The autocompletion completion uses static analysis, so the variables won’t be completed unless defined in the workspace. During editing, the field names of a struct are not known as they are unavailable in the workspace. Therefore you cannot access the members of the struc variables. But autocomplete can be used while debugging the program. A static code analysis might be misleading also, because fields can be created dynamically also.

[ChiPhi85]

Is there no way to load the struct into the workspace from the app?

Answer 2

[Stefan]

You could create a class instead of a dynamic struct. For all static properties you will get auto completion.

classdef myStructClass
   properties
      StaticProperty1
      StaticProperty2
      DynamicProperties
   end
   
   methods
       
   end
end

If you still need some dynamic Properties, you could create a Struct inside the DynamicProperties or similar

properties (Access = private)
    myStruct myStructClass;
end
    
methods   
    function startupFcn(app)
        x = load('DemoStruct.mat')    
        myStruct = x.myStruct
        
        myStruct.StaticProperty1 = 1; %Auto completion
        myStruct.DynamicProperties.I_Need_This_Dynamically = 1; %No Auto completion
    end
end