MATLAB: App Designer not changing Edit Field Value after button is pushed

Question

Using the callback below, I am trying to print text to a "status bar" (Edit Field Text) before the body of the function is reached to indicate that the App is "processing". At the end of the script, I am printing "STATUS: Complete" to indicate that the funcion is done running. The "STATUS: Complete" text has no trouble being displayed in the edit text field, but i can't get it to print the initial STATUS text.

My code is arranged like so:

function ButtonPushed(app, event)

app.StatusField.Value = 'STATUS: Processing…';

[body of function….]

app.StatusField.Value = 'STATUS: Complete';

end

Answer 1

Try this

function ButtonPushed(app, event)
app.StatusField.Value = 'STATUS: Processing...';
drawnow()  % <---- tell matlab to update now
[body of function....]
app.StatusField.Value = 'STATUS: Complete';
end

https://www.mathworks.com/help/matlab/ref/drawnow.html