Move Window beyond screen border

I have a fairly simple question I cannot find a solution for: I want to move a window out of the visible screen area. My first try was using

Code:

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move (-100,0);

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Unfortunately this does not work - the window only moves to (0,0). Only when I drag the window manually over the screen border, let's say to (-10,0) and then call move(-100,0) the window will actually move to (-100,0)!

Is there any possibility to solve this? What I finally want to is create a fullscreen GUI and fade out single "views" to the left by moving the respective widget out of the visible are. Maybe there is a better way of doing that?

See the other thread: http://www.qtcentre.org/threads/5655...een-boundaries

Using the Qt::X11BypassWindowManagerHint flag solved the problem for me! Thanks for you hint to the window manager system!