Can I refer callbacks from a socket class to the parent app in AppDesigner?

Right now I have an app that is meant to recieve external data from a socket and use it within the app. The thing is, I can't implement the entire socket interface myself within the app; instead I am using a WebSocket class library. I have a subclass implementing the socket class that looks something like this:

classdef myClient < WebSocketClient
    methods
        function obj = myClient(savepath, varargin)
            %Constructor
            obj@WebSocketClient(varargin{:});
        end
    end
    
    methods (Access = protected)
        function onOpen(obj,message)
            fprintf('%s\n',message);            
        end
        
        function onTextMessage(obj,message)
            % from here, I want to send the recieved message as well as this object to my app
        end
    end
end

I also have a MATLAB app with an instantiation of myClient. What I want is for the MATLAB app to be notified/have one of its own functions called when the onTextMessage callback is triggered. How would this be possible?

Answer 1

[Nihal]

1. Define an Event in your myClient Class: First, add an event declaration inside your myClient class. This event represents the action of receiving a message.
2. Trigger the Event on Message Reception: Modify the onTextMessage method in your myClient class so that whenever a message is received, this event is triggered and any additional information, like the received message, is passed along with the event.
3. Listen for the Event in Your MATLAB App: In your MATLAB app, set up an event listener that listens for the event you defined. When setting up this listener, specify a method of your app to be called whenever the event is triggered.
4. Handle the Event in Your App: Implement the method in your app that you specified as the event listener. This method will execute whenever the event is triggered, allowing you to handle the received message within your app.

By following these steps, your MATLAB app will be able to react to messages received by the myClient instance without directly managing the socket communication itself.