Move toplevel window ignoring screen edges, docks

[Thomas Jollans <t jollybox de>]

Hi,

I'm looking for a way to place a window freely, possibly partially 
outside the confines of the screen, without that window being always-on-top.

When calling gtk_window_move on a window of type GTK_WINDOW_TOPLEVEL, 
the window manager respects the screen edges and panels and place the 
window in such a way that it is completely visible. Is there a hint I 
can set to disable this behaviour?

When using a GTK_WINDOW_POPUP type window, the window moves free of 
constraint, but the window is always on top; is there a way to make a 
POPUP window stack like a TOPLEVEL?

--
Thomas