From 92667cc2fb17af947c202d2de765d8736679e858 Mon Sep 17 00:00:00 2001
From: Po Lu <luangruo@yahoo.com>
Date: Tue, 19 Apr 2022 11:18:25 +0800
Subject: [PATCH] Fix last change for GTK 2

* src/xfns.c (x_set_alpha_background):
* src/xterm.c (x_update_opaque_region): Move some ifdefs around.
---
 src/xfns.c  |  2 +-
 src/xterm.c | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/xfns.c b/src/xfns.c
index 9ceba98f67d..c7e2984ce13 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -732,7 +732,7 @@ x_set_alpha_background (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
 {
   unsigned long opaque_region[] = {0, 0, FRAME_PIXEL_WIDTH (f),
 				   FRAME_PIXEL_HEIGHT (f)};
-#ifdef USE_GTK
+#ifdef HAVE_GTK3
   GObjectClass *object_class;
   GtkWidgetClass *class;
 #endif
diff --git a/src/xterm.c b/src/xterm.c
index b5b2fe32947..c4652c19c66 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -3790,6 +3790,10 @@ x_update_opaque_region (struct frame *f, XEvent *configure)
 				   (configure
 				    ? configure->xconfigure.height
 				    : FRAME_PIXEL_HEIGHT (f))};
+#ifdef HAVE_GTK3
+  GObjectClass *object_class;
+  GtkWidgetClass *class;
+#endif
 
   if (!FRAME_DISPLAY_INFO (f)->alpha_bits)
     return;
@@ -3815,6 +3819,14 @@ x_update_opaque_region (struct frame *f, XEvent *configure)
 		     FRAME_DISPLAY_INFO (f)->Xatom_net_wm_opaque_region,
 		     XA_CARDINAL, 32, PropModeReplace,
 		     (unsigned char *) &opaque_region, 4);
+  else
+    {
+      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));
+    }
 #endif
   unblock_input ();
 }
-- 
2.39.2