Unsolved Insert QRect values inside qss stylesheet

[fabval]

Hi,
I have a qproperty which relies on a QRect

Q_PROPERTY(QRect systemRect READ getSystemRect WRITE updateSystemRect)

Inside the .qss sytlesheet I write

qproperty-systemRect: -2500 -2500 5000 5000;

But when my write method is invoked, the QRect is empty.

I saw that the setProperty method handles the QRect, but I don't know how to set its values inside the qss stylesheet.

Any hint?

Thanks in advance,

Fabrizio