From e0d70d4dc9c231b32ed2f657451ddfb262e86a56 Mon Sep 17 00:00:00 2001
From: balooii balooii <balooii@proton.me>
Date: Sat, 7 Mar 2026 08:17:52 +0100
Subject: [PATCH] Issue #12357: Fix navigation popup positioning and dragging
 on Wayland

---
 app/display/gimpnavigationeditor.c |  2 ++
 app/widgets/gimpnavigationview.c   | 17 ++++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/app/display/gimpnavigationeditor.c b/app/display/gimpnavigationeditor.c
index 77f5d53ac1..cf580cd8a0 100644
--- a/app/display/gimpnavigationeditor.c
+++ b/app/display/gimpnavigationeditor.c
@@ -312,6 +312,8 @@ gimp_navigation_editor_popup (GimpDisplayShell *shell,
   /* Set poup screen */
   gtk_window_set_screen (GTK_WINDOW (shell->nav_popup),
                          gtk_widget_get_screen (widget));
+  gtk_window_set_transient_for (GTK_WINDOW (shell->nav_popup),
+                                GTK_WINDOW (gtk_widget_get_toplevel (widget)));
 
   gimp_navigation_view_get_local_marker (view,
                                          &view_marker_center_x,
diff --git a/app/widgets/gimpnavigationview.c b/app/widgets/gimpnavigationview.c
index beb206d1d6..0e32f1f5ff 100644
--- a/app/widgets/gimpnavigationview.c
+++ b/app/widgets/gimpnavigationview.c
@@ -387,10 +387,21 @@ gimp_navigation_view_motion_notify (GtkWidget      *widget,
       return FALSE;
     }
 
-  gimp_navigation_view_move_to (nav_view,
-                                mevent->x - nav_view->motion_offset_x,
-                                mevent->y - nav_view->motion_offset_y);
+  /* Derive window-local coords from root coords and event_window's screen origin.
+   * This only makes a difference on Wayland, on other platforms the event coords
+   * are not local so this is a noop */
+  {
+    gint     origin_x, origin_y;
+    gdouble  mx, my;
 
+    gdk_window_get_origin (view->event_window, &origin_x, &origin_y);
+    mx = mevent->x_root - origin_x;
+    my = mevent->y_root - origin_y;
+
+    gimp_navigation_view_move_to (nav_view,
+                                  mx - nav_view->motion_offset_x,
+                                  my - nav_view->motion_offset_y);
+  }
   gdk_event_request_motions (mevent);
 
   return TRUE;