From 8789e787965dbf574b01be8b514c917085039d77 Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Thu, 22 Apr 2021 14:37:39 +0100
Subject: [PATCH] a11y: Update the level property for tree expanders

We already have the depth of a tree expander in order to compute the
indentation.

Fixes: #3892
---
 gtk/gtktreeexpander.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gtk/gtktreeexpander.c b/gtk/gtktreeexpander.c
index 4ebc072236..19b577d826 100644
--- a/gtk/gtktreeexpander.c
+++ b/gtk/gtktreeexpander.c
@@ -239,6 +239,11 @@ gtk_tree_expander_update_for_list_row (GtkTreeExpander *self)
             }
         }
 
+      /* The level property is >= 1 */
+      gtk_accessible_update_property (GTK_ACCESSIBLE (self),
+                                      GTK_ACCESSIBLE_PROPERTY_LEVEL, depth + 1,
+                                      -1);
+
       while (child)
         {
           GtkWidget *prev = gtk_widget_get_prev_sibling (child);