Loop not working

Anturaju93

Hi.
I'm new to QT and I'm trying to create a project for school using QT and Arduino. I want to send signals to a RGB LED in a loop when I push a button, to light up the LED colors one after another, but the code in the loop does not work:

void Dialog::on_pushButton_pressed()
{
    buclaLeduri();
}

void Dialog::buclaLeduri(){
    int i = 1;
    while(i>=10){
        Dialog::updateRGB(QString("r%1").arg(ledAprins));
        qDebug() << ledAprins;
        Sleep(500);
        Dialog::updateRGB(QString("r%1").arg(ledStins));
        qDebug() << ledStins;
        Sleep(500);
        i++;
    }
}

Any help, please?
Thanks!

SGaist

Hi and welcome to devnet,

You are blocking the event loop which is always a wrong idea. Use a QTimer to trigger what you want at regular interval.

sowas

@SGaist
the loop will never work, as it can not start when i = 1, and
the start condition is (i > 10), 1 is not equal or bigger than 10.

SGaist

@sowas good catch ! The blocking loop pattern made me miss that part.