[gtk/matthiasc/for-master: 4/5] constraintlayout: Emit less change notification

[Matthias Clasen <matthiasc src gnome org>]

commit 4b8134b19b7430b37093d2361d94313137ba0388
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 30 14:57:58 2020 -0400

    constraintlayout: Emit less change notification
    
    This isn't strictly required for correctness, but
    it makes the GtkBuilder codepath do the same that
    the vfl codepath does: call gtk_layout_manager_layout_changed
    only once, after all the constraints have been added.

 gtk/gtkconstraintlayout.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkconstraintlayout.c b/gtk/gtkconstraintlayout.c
index 20027b480c..86ae56ce06 100644
--- a/gtk/gtkconstraintlayout.c
+++ b/gtk/gtkconstraintlayout.c
@@ -1696,9 +1696,14 @@ gtk_constraint_layout_custom_finished (GtkBuildable *buildable,
               continue;
             }
 
-          gtk_constraint_layout_add_constraint (data->layout, c);
+          layout_add_constraint (data->layout, c);
+          g_hash_table_add (data->layout->constraints, c);
+          if (data->layout->constraints_observer)
+            g_list_store_append (data->layout->constraints_observer, c);
         }
 
+      gtk_layout_manager_layout_changed (GTK_LAYOUT_MANAGER (data->layout));
+
       g_list_free_full (data->constraints, constraint_data_free);
       g_list_free_full (data->guides, guide_data_free);
       g_object_unref (data->layout);