Fix T59713: Armature layer dots not updated on changes

`layer_used` runtime data, which controls the drawing of dots in the UI was not getting refreshed properly.
This used to happen in the drawing code, but was no longer working for reasons explained in:
{rB2b09062defa093a243b5fe64b099accb07b440a3}

The solution was to update each layer manually in the operators:
* ARMATURE_OT_bone_primitive_add
* ARMATURE_OT_delete
* ARMATURE_OT_dissolve
* ARMATURE_OT_fill
* ARMATURE_OT_merge
* ARMATURE_OT_separate
* ARMATURE_OT_bone_layers
* POSE_OT_bone_layers

Differential Revision: https://developer.blender.org/D5281

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/editors/armature/armature_utils.c b/source/blender/editors/armature/armature_utils.c
index 5d424594229..d8777b7e0b7 100644
--- a/source/blender/editors/armature/armature_utils.c
+++ b/source/blender/editors/armature/armature_utils.c
@@ -85,6 +85,18 @@ void ED_armature_edit_validate_active(struct bArmature *arm)
   }
 }
 
+/* Update the layers_used variable after bones are moved between layer
+ * NOTE: Used to be done in drawing code in 2.7, but that won't work with
+ *       Copy-on-Write, as drawing uses evaluated copies.
+ */
+void ED_armature_edit_refresh_layer_used(bArmature *arm)
+{
+  arm->layer_used = 0;
+  for (EditBone *ebo = arm->edbo->first; ebo; ebo = ebo->next) {
+    arm->layer_used |= ebo->layer;
+  }
+}
+
 /* *************************************************************** */
 /* Bone Operations */