How close secondary apps when the main app closed?

I'm creating an app in matlab app designer with multiple secondary windows and the main window. I want to close all the secondary windows when the main window is ordered to be closed. I looked around on the forum and found some things about close the app. I tried to implement a FigureCloseRequest and delete(get(0, 'Children'), but didn't work.

So, I was planning to build a function that lists the sub-apps that are open and delete them when the main figure is requested to close, but I'm having trouble figuring out how to do it from the app propriety. Could you please aid me?

Answer 1

[Mohammad Sami]

You will need to store a reference to the secondary app in your main app. This will allow you to close it in the CloseRequestFcn of the main app. You can set this function in the main app by selecting UIFigure in the component browser in the design view. See attached picture.

Then assuming you have stored the handle to the secondary app in the main app you can do as follows in the Main App UIFigureCloseRequestFcn

function functionThatOpensSecondaryApp(app)
    app.SecondaryApp = SecondaryApp(..);
end

function UIFigureCloseRequest(app, event)
    delete(app.SecondaryApp);
    delete(app);
end

More details can be found at the link below.

https://www.mathworks.com/help/releases/R2021a/matlab/creating_guis/creating-multiwindow-apps-in-app-designer.html?s_tid=doc_srchtitle

[Nélio Dias]

The problem is that example is to simple. If I have two secondary apps, and only one is open, this code

function UIFigureCloseRequest(app, event)

delete(app.SecondaryApp1);

delete(app.SecondaryApp2);

delete(app);

end

will give me error because SecondaryApp2 is empty, so I need a way to check which app is open to delete it.

I tried to create a list of the apps open and delete them, but gives error too. This the code

methods (Access = public)

function createSubAppList(app, newSubApp)

app.mySubAppsList = [app.mySubAppsList, newSubApp];

end

function deleteSubApps(app)

delete(app.mySubAppsList)

end

end

% The event that create the subapp

function ButtonPushed(app, event)

app.SecondaryApp1 = SecondaryApp1(app.SecondaryApp1);

createSubAppList(app, app.SecondaryApp1);

end

% Close request function: LABVCONUIFigure

function UIFigureCloseRequest(app, event)

deleteSubApps(app)

delete(app)

end

end

[Mohammad Sami]

You can try the following

function deleteSubApps(app)
    arrayfun(@delete,app.mySubAppsList);            
end

[Nélio Dias]

There is a problem, generating this error

The following error occurred converting from SecondaryApp2 to
SecondaryApp3:
Not enough input arguments.

I think when a create a new list the app try to call the secondary app again that is already in the list.