QT4 How to blur QPixmap image?

Question

QT4 How to blur QPixmap image?

I am looking for something like one of the following:

Blur(pixmap); 
painter.Blur(); 
painter.Blur(rect);
         


        

Answer 1

Add python code based on @Петър Петров answer for QT 5.

def applyEffectToImage(src, effect):
    scene = QGraphicsScene()
    item = QGraphicsPixmapItem()
    item.setPixmap(QPixmap.fromImage(src))
    item.setGraphicsEffect(effect)
    scene.addItem(item)
    res = QImage(src.size(), QImage.Format_ARGB32)
    res.fill(Qt.transparent)
    ptr = QPainter(res)
    scene.render(ptr, QRectF(), QRectF(0,0, src.width(), src.height()) )
    return res

blur = QGraphicsBlurEffect()
blur.setBlurRadius(8)
source = QImage(r"C:\Users\fran\Desktop\test.png")
result = applyEffectToImage(source, blur)
result.save(r"C:\Users\fran\Desktop\result.png")