How to add a logo in a specific size?

[eefesafak]

Hi everyone, My goal is to add a logo on QImage. However, when the every QImage changes, the size of logo is changing concurrently. How can i prevent this? Thanks for your precious time. Here is my code and example:

foreach(const QString& string, m_fileList)
    {
        QImage image(string);

        QString logoPath = "/home/efe/Desktop/logo.png";
        QImage logo(logoPath);
        QImage logo2 = logo.scaled(100, 100, Qt::KeepAspectRatio);
        QPainter painter(&image);
        painter.setOpacity(0.5);

        const QPoint point(10, 10);

        painter.drawImage(point, logo2);
        painter.end();

        ui->imageLabel->setPixmap(QPixmap::fromImage(image));
        QThread::msleep(2000);
    }

[eefesafak]

@eefesafak I just understood what's going on. I had

ui->imageLabel->setScaledContents(true);

in my constructor. Actually, the size of logo was not changed. I change my code to :

ui->imageLabel->setScaledContents(false);

and my problem was solved.

[J.Hilk]

@eefesafak please solve this as well

QThread::msleep(2000);

it hurts my soul.

[eefesafak]

@J-Hilk Why does it hurt your soul? I used it to see result better. Normally, it's not inside the code. What can i use instead?

[J.Hilk]

@eefesafak you're lucky, that you see something painted at all.

use a QTimer!

here a quick and dirty implementation ;) :

QTimer *t(new QTimer());
    QObject::connect(t, &QTimer::timeout, [=](int index = 0) mutable ->void{
        if(index >= m_fileList.size()){
            t->deleteLater();
            return;
        }
        QImage image(m_fileList.at(index));
        
        QString logoPath = "/home/efe/Desktop/logo.png";
        QImage logo(logoPath);
        QImage logo2 = logo.scaled(100, 100, Qt::KeepAspectRatio);
        QPainter painter(&image);
        painter.setOpacity(0.5);
        
        const QPoint point(10, 10);
        
        painter.drawImage(point, logo2);
        painter.end();
        
        ui->imageLabel->setPixmap(QPixmap::fromImage(image));
        ++index;
    });