Fix bug#55779

* src/xterm.c (x_update_opaque_region): Don't make GTK reset the
opaque region if F is a child frame.

diff --git a/src/xterm.c b/src/xterm.c
index 3b60dba69bdfb0c682a2a269be7606d3c52d6004..a6ef2bfd159e613741cd333caf6ccf40af80b3cb 100644 (file)
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4349,11 +4349,16 @@ x_update_opaque_region (struct frame *f, XEvent *configure)
                     (unsigned char *) &opaque_region, 4);
   else
     {
-      object_class = G_OBJECT_GET_CLASS (FRAME_GTK_OUTER_WIDGET (f));
-      class = GTK_WIDGET_CLASS (object_class);
+      /* This causes child frames to not update correctly for an
+        unknown reason.  (bug#55779) */
+      if (!FRAME_PARENT_FRAME (f))
+       {
+         object_class = G_OBJECT_GET_CLASS (FRAME_GTK_OUTER_WIDGET (f));
+         class = GTK_WIDGET_CLASS (object_class);
 
-      if (class->style_updated)
-       class->style_updated (FRAME_GTK_OUTER_WIDGET (f));
+         if (class->style_updated)
+           class->style_updated (FRAME_GTK_OUTER_WIDGET (f));
+       }
     }
 #endif
   unblock_input ();