I just realized that gdk_window_reparent may be badly broken when you
reparent a toplevel window.

In this case you have two top level windows shadowing each other which
is tricky worse a lot of code assumes that the subsurface of a parent
== the childs surface.

My opinion is that all this code should change so that when you
reparent a toplevel window it made a child window and its surface
becomes a subsurface of its parent with a blit to copy the old window.
The old window is then destroyed.

Comments ?

Mike

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