How to detect screen resolution in qt?

Question

I set resolution of frame buffer in Intel platform using ioctl methods of Linux kernel. I able to set this resolution successfully (verify with again get this parameters) but didn't get in qt. When I check desktop geometry it was get which I set on boot (1920*1024) and also not getting resizeevent(). Can somebody say where am lacking .... ?

Answer 1

Try this:

QDesktopWidget widget;
QRect mainScreenSize = widget.availableGeometry(widget.primaryScreen());