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Editorial Team
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Asked: 2026-06-11T09:32:44+00:00

This seems like it should be automatic, but apparently it’s not. I have the

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This seems like it should be automatic, but apparently it’s not. I have the following code:

    ui.my_label->setText("Test 1...");
    ui.my_label->adjustSize();

    processThatTakesAbout30SecondsToFinish(files[0].toStdString());

    ui.my_label->setText("Finished.");
    ui.my_label->adjustSize();

What is happening is that I never see "Test1...", as the GUI seems to hang until the following function completes, and I eventaully only see “Finished.”.

How can I make sure the GUI is updating before it enters that function?
Thanks.

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1 Answer

  1. Editorial Team

    You shuld be able to process the event queue before entering your code if you;

    #include <QApplication>

    and, when you want to refresh your GUI, call;

    qApp->processEvents();

    Note that it may be a good idea to let your long running process call that function now and then, to make your GUI feel more responsive.

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