Is it possible to move a QML application offscreen?

[thegecko]

I need to slide a QML desktop tool window in from off-screen and have managed to move the viewer window from QML by passing a reference to the viewer using the rootContext.
For some reason, though, I cannot programmatically move the viewer off the top of the screen.
Is this a known limitation of Qt or is there a usable workaround?

I am using gnome 3 and have proved this is possible using the GTK framework.

Thanks, Rob