Fix missing Outliner updates when adding nodetrees

When e.g. grouping nodes into nodegroups, these would not show up
immediately in the Outliner (Blender File / Data API view).

Now send (unique combination, not used elsewhere) notifiers (and listen
for these in the Outliner).

Differential Revision: https://developer.blender.org/D16093

2 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/node_add.cc b/source/blender/editors/space_node/node_add.cc
index efe53fd6f14..10e903ca79b 100644
--- a/source/blender/editors/space_node/node_add.cc
+++ b/source/blender/editors/space_node/node_add.cc
@@ -777,6 +777,8 @@ static int new_node_tree_exec(bContext *C, wmOperator *op)
     ED_node_tree_update(C);
   }
 
+  WM_event_add_notifier(C, NC_NODE | NA_ADDED, NULL);
+
   return OPERATOR_FINISHED;
 }
 
diff --git a/source/blender/editors/space_node/node_group.cc b/source/blender/editors/space_node/node_group.cc
index 21def1bd9d7..e0de5e2f71d 100644
--- a/source/blender/editors/space_node/node_group.cc
+++ b/source/blender/editors/space_node/node_group.cc
@@ -1047,6 +1047,8 @@ static int node_group_make_exec(bContext *C, wmOperator *op)
 
   ED_node_tree_propagate_change(C, bmain, nullptr);
 
+  WM_event_add_notifier(C, NC_NODE | NA_ADDED, NULL);
+
   /* We broke relations in node tree, need to rebuild them in the graphs. */
   DEG_relations_tag_update(bmain);