Patch-Source: https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/6184
https://gitlab.gnome.org/GNOME/gimp/-/issues/6711
--
From 3e3266dce4a8aed453f296ca8043e3574ff29f63 Mon Sep 17 00:00:00 2001
From: Luca Bacci <luca.bacci982@gmail.com>
Date: Thu, 13 Jul 2023 15:31:05 +0200
Subject: [PATCH 1/2] GdkWindow: Check for offscreen windows in
 set_transient_for ()

Fixes https://gitlab.gnome.org/GNOME/gimp/-/issues/6711
---
 gdk/gdkwindow.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 727b0cf1f43..62d488d7594 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -10542,6 +10542,13 @@ void
 gdk_window_set_transient_for (GdkWindow *window,
 			      GdkWindow *parent)
 {
+  if (!gdk_window_is_offscreen (window) &&
+      parent != NULL &&
+      gdk_window_is_offscreen (parent))
+    {
+      return;
+    }
+
   window->transient_for = parent;
 
   GDK_WINDOW_IMPL_GET_CLASS (window->impl)->set_transient_for (window, parent);
-- 
GitLab


From 272b6b4febb3e293239e178410f87abcad85ba2d Mon Sep 17 00:00:00 2001
From: Luca Bacci <luca.bacci982@gmail.com>
Date: Thu, 13 Jul 2023 16:24:55 +0200
Subject: [PATCH 2/2] GtkMenu: Take offscreen windows in account for
 positioning

---
 gtk/gtkmenu.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/gtk/gtkmenu.c b/gtk/gtkmenu.c
index eac972bb41b..3f1a7bc9fac 100644
--- a/gtk/gtkmenu.c
+++ b/gtk/gtkmenu.c
@@ -5263,6 +5263,24 @@ gtk_menu_position (GtkMenu  *menu,
         }
     }
 
+  if (rect_window != NULL &&
+      GDK_WINDOW_TYPE (rect_window) == GDK_WINDOW_OFFSCREEN)
+    {
+      GdkWindow *effective = gdk_offscreen_window_get_embedder (rect_window);
+
+      if (effective)
+        {
+          double x = rect.x, y = rect.y;
+
+          gdk_window_coords_to_parent (rect_window, x, y, &x, &y);
+
+          rect.x = x;
+          rect.y = y;
+        }
+
+      rect_window = effective;
+    }
+
   if (!rect_window)
     {
       gtk_window_set_unlimited_guessed_size (GTK_WINDOW (priv->toplevel),
-- 
GitLab