Appdesigner: updating the value of Text area

I want to show status of a function such as "running" and "finished" on a textarea like following code,

The start-button is pushed, then the calculantion function is started. And I expected the status(running/stopped) is updated on a text area, but it didn't work. ("running" condition did not show, but 'finished' did.)

function StartButtonPushed(app, event)
     app.val = app.PromptTextArea.Value;
     app.StartButton.Enable = "off";
     app.statusTextArea.Value = "running";
     calculation(app, app.val);
     app.ResponseTextArea.Value = app.answer;
     app.statusTextArea.Value = 'finished';
end

As a temporal solution, I placed "pause" like below. Do you have some smarter one?

function StartButtonPushed(app, event)
     app.val = app.PromptTextArea.Value;
     pause(1); % placed pause
     app.StartButton.Enable = "off";
     pause(1); % placed pause
     app.statusTextArea.Value = "running";
     pause(1); % placed pause
     calculation(app, app.val);
     app.ResponseTextArea.Value = app.answer;
     app.statusTextArea.Value = 'finished';
end

[Cris LaPierre]

I built a simple test app using the code you shared. It appears to work as you'd expect without needing to add pauses.

It may depend on what is happening in your calculation function. Try using drawnow instead of pause(1).

Answer 1

[Adam Danz]

See drawnow

function StartButtonPushed(app, event)
     app.val = app.PromptTextArea.Value;
     app.StartButton.Enable = "off";
     app.statusTextArea.Value = "running";
     drawnow() % <-----
     calculation(app, app.val);
     app.ResponseTextArea.Value = app.answer;
     app.statusTextArea.Value = 'finished';
end

[Hisato Tanimoto]

Using drawnow went well. Thank you for your both answers.