QTransform calculation with respect to view transform

repl

I wanted to understand what the following code is doing, Can someone please help me...

QGraphicsView *view = getActiveView();
QTransform viewTransform = view ->transform();
QPen pen = painter->pen();
QTransform myPenTrans = pen.transform();
QTransform mapTransform = myPenTrans .transposed().adjoint()/myPenTrans .determinant()
qDebug() << mapTransform .m11(); // what this value represents ?

SGaist

Hi,

The method documentation provides the information:

Returns the horizontal scaling factor.