Update QLabel text in a loop

[A Former User]

Hi,

I am trying to show the result of each step of my algorithm in a QLabel to verify the execution, but the QLabel doesn't change.
I think the problem is because each step take 5 second approximately but I don't understand the problem.

Here is the part of my code :

for(int t(0) ; t < limit ; t++)
{
        /*
           execution of the step t of the algorithm ( 5 second approximately )
       */
        resultLabel->setText("result"+ <result here>)
}

I also tried to do it with a QMessageBox::information and it works, but I have to click Ok every time :

for(int t(0) ; t < limit ; t++)
{
        /*
           execution of the step t of the algorithm ( 5 second approximately )
       */
       QMessageBox::information(this,"result",<result here>)
}

Thanks

[hskoglund]

Hi, you can force a refresh of your QLabel by calling processEvents():

for(int t(0) ; t < limit ; t++)
{
        /*
           execution of the step t of the algorithm ( 5 second approximately )
       */
        resultLabel->setText("result"+ <result here>);

        qApp->processEvents();
`}

[A Former User]

Thanks for your answer, unfortunately this part of my code is executed in a class that inherits from QMainWindow, I don't have access to the QApplication.

Edit:

It works using QCoreApplication::processEvents() instead.