App Designer button callback

function GOButtonPushed(app, event)
    app.Lamp.Color = 'yellow';
    % Some long computation.
    app.Lamp.Color = 'green';
 end

If I have the above code the lamp never turns yellow. It seems like the UI doensn't refresh until the entire callback finishes.

Is there a way to fix this?

Answer 1

[Rik]

You can force a graphics update with drawnow, or by introducing a small pause (in general I see people using pause(0.01) or a similar amount of time). Either will flush the queue of graphics updates.

[Evan Bates]

Is this still the solution? I have the same problem.

[Rik]

I would expect so. Have you tried it?