Thanks for replying Dan, much appreciated. Let me explain what I am trying to achieve: I am creating a "picture in a picture effect" (using XV in a window, amongst other windows).  GTK doesn't play well with overlapping widgets, and gtk.Fixed() doesn't guarantee Z-order.  So I am using a stack of gtk.Windows without decoration to achieve the desired effect, but the appearance is that everything looks like a nice gtk layout. <div> On 8/27/07, Dan Winship <<a href="mailto:dwinship@redhat.com">dwinship@redhat.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Erik Blankinship wrote: > A UI I am working on has multiple gtk.Windows, which I would like to > hide when they are resizing (to avoid screen flashes). > > The multiple gtk.Windows are set_transient() for each other, allowing me > to "stack" them, and when I hide() and show(), the flicker is indeed gone! "transient_for" doesn't mean "stack this window above this other window". It means (quoting from the ICCCM) "this window is a pop-up on behalf of the named window". Swapping two windows around so that sometimes one of them is transient for the other and other times vice versa makes no sense by this definition, so there's no telling what the WM will do if you do that.</blockquote><div> I don't care about recalling set_transient, I just want windows to show up consistently in the expected order.  I am not changing what is set_transient for what, just trying to get windows to show up again by recalling that method. </div></div>