Not doing these calls doesn't seem to affect the demo,
so lets just remove them.
G_CALLBACK (offscreen_window_from_parent2), offscreen_box);
context = gtk_widget_get_style_context (widget);
- gtk_style_context_set_background (context, window);
- gtk_style_context_set_background (context, offscreen_box->offscreen_window1);
- gtk_style_context_set_background (context, offscreen_box->offscreen_window2);
gdk_window_show (offscreen_box->offscreen_window1);
gdk_window_show (offscreen_box->offscreen_window2);