Gets the toplevel window that's an ancestor of window.
Any window type but GDK_WINDOW_CHILD is considered a
toplevel window, as is a GDK_WINDOW_CHILD window that
has a root window as parent.
Note that you should use gdk_window_get_effective_toplevel() when
you want to get to a window's toplevel as seen on screen, because
gdk_window_get_toplevel() will most likely not do what you expect
if there are offscreen windows in the hierarchy.
Gets the toplevel window that's an ancestor of window. Any window type but GDK_WINDOW_CHILD is considered a toplevel window, as is a GDK_WINDOW_CHILD window that has a root window as parent. Note that you should use gdk_window_get_effective_toplevel() when you want to get to a window's toplevel as seen on screen, because gdk_window_get_toplevel() will most likely not do what you expect if there are offscreen windows in the hierarchy.