Detachable QDockWidget tabs

Hello,
I was looking for an implementation of a detachable qdockwidget and i came across this thread http://www.qtcentre.org/threads/6140...ockWidget-tabs
I tried their solution and it worked great except with tabifyDockWidget. When i drag the qdockwidget with the mouse onto another qdockwidget i get the close buttons on the tabs which is great, but when i use tabifyDockWidget i don't get the close buttons on the tabs.

How to get tabifyDockWidget to give the same result as dragging the qdockwidgets with the mouse.

Thanks in advance