I'm developing a new QML element in C++ based. My class NewQMLitem inherits from QDeclarativeItem and it's paint() method is responsible for drawing a QImage to the screen:

void NewQMLitem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
// image is a QImage*
painter->drawImage(0, 0, *image);
}

The code above works perfectly. However, when I pass X,Y coordinates to drawImage() other than zero, part of the resulting image is not updated correctly to the screen and appears filled with black.

I attached a sample image to this post to illustrate the problem.

My current workaround requires invoking widget->update() at the end of paint(), which is just terrible.