1 files changed, 33 insertions, 0 deletions
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index 5af961ed5aeb..c45a66e9edd4 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -2546,6 +2546,39 @@ public:
         return pTopLevel && gtk_window_is_active(pTopLevel) && has_focus();
     }
 
+    // is the focus in a child of this widget, where a transient popup attached
+    // to a widget is considered a child of that widget
+    virtual bool has_child_focus() const override
+    {
+        bool bRet = false;
+
+        GList* pList = gtk_window_list_toplevels();
+
+        for (GList* pEntry = pList; pEntry; pEntry = pEntry->next)
+        {
+            if (!gtk_window_has_toplevel_focus(GTK_WINDOW(pEntry->data)))
+                continue;
+            GtkWidget* pFocus = gtk_window_get_focus(GTK_WINDOW(pEntry->data));
+            if (pFocus && gtk_widget_is_ancestor(pFocus, m_pWidget))
+            {
+                bRet = true;
+                break;
+            }
+            GtkWidget* pAttachedTo = gtk_window_get_attached_to(GTK_WINDOW(pEntry->data));
+            if (!pAttachedTo)
+                continue;
+            if (pAttachedTo == m_pWidget || gtk_widget_is_ancestor(pAttachedTo, m_pWidget))
+            {
+                bRet = true;
+                break;
+            }
+        }
+
+        g_list_free(pList);
+
+        return bRet;
+    }
+
     virtual void set_has_default(bool has_default) override
     {
         g_object_set(G_OBJECT(m_pWidget), "has-default", has_default, nullptr);