QMenu display orientation

[qtnewbi3]

Hi,

I am trying to use QMenu and have managed to get it to work. However, the default is when you on onto a sub menu it opens towards the right. I would like to change this pop-out to open towards the left. Is there any function with respect to QMenuBar or QMenu which will make it open to left. The reason is I have my menu towards the end of the window and the options are displayed overlapping edge of the window and onto the desktop.

Thanks