Appdesigner: updating the value of Text area

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寿人
寿人 2025-2-11
移动：Stephen23 2025-2-12
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
  1 个评论
Cris LaPierre
Cris LaPierre 2025-2-11
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).

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采纳的回答

Adam Danz
Adam Danz 2025-2-11
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

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