Interrupting QEventLoop with signals ?

[oldFox64]

I'm reading a file and using a progress bar.

while(!in.atEnd()){
        //work
        ui->progressBar->setValue(in.pos());
        qApp->processEvents(QEventLoop::ExcludeUserInputEvents); // "disables" gui
    }

while(!in.atEnd()){
        //work
        ui->progressBar->setValue(in.pos());
        qApp->processEvents(QEventLoop::ExcludeUserInputEvents); // "disables" gui
    }

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During this event, there is the possibility that a signal is emitted, the issue is that I can't detect it because of the QEventLoop.