UI: Allow gizmo-only redraw tagging

NOTE: This change shouldn't have any visible effect. It's just the
first (easiest) step towards decoupling gizmo redraws from viewport
redraws.

We currently redraw the entire region whenever a gizmo needs redrawing,
which would be nice to avoid in the future, see T73198. The first step
towards this would be having a separate tag for them, which is what
this patch implements.
The term "editor-overlays" was chosen because for the forseeable future,
we'll also have to redraw non-gizmo overlays in-between drawing 3D and
2D gizmos. Namely annotations.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D6838

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/space_view3d/view3d_gizmo_ruler.c b/source/blender/editors/space_view3d/view3d_gizmo_ruler.c
index e53957b054d..db120b246c7 100644
--- a/source/blender/editors/space_view3d/view3d_gizmo_ruler.c
+++ b/source/blender/editors/space_view3d/view3d_gizmo_ruler.c
@@ -933,7 +933,7 @@ static int gizmo_ruler_modal(bContext *C,
   ruler_info->drag_state_prev.do_thickness = do_thickness;
 
   if (do_draw) {
-    ED_region_tag_redraw(ar);
+    ED_region_tag_redraw_editor_overlays(ar);
   }
   return exit_code;
 }
@@ -1187,7 +1187,7 @@ static int view3d_ruler_remove_invoke(bContext *C, wmOperator *op, const wmEvent
       /* Update the annotation layer. */
       view3d_ruler_to_gpencil(C, gzgroup);
 
-      ED_region_tag_redraw(ar);
+      ED_region_tag_redraw_editor_overlays(ar);
       return OPERATOR_FINISHED;
     }
   }