WIP

@@ -424,0 +453,4 @@
+  }
+  if (const bke::greasepencil::Drawing *drawing =
+          bke::greasepencil::get_eval_grease_pencil_layer_drawing(*grease_pencil,
+                                                                  component_index_))

@@ -1986,2 +1986,4 @@
   /* eSpaceSpreadsheet_ObjectEvalState. */
   uint8_t object_eval_state;
+  /* Active index for list of components in another component. */
+  uint32_t active_component_index;

@@ -503,8 +542,8 @@ bke::GeometrySet spreadsheet_get_display_geometry_set(const SpaceSpreadsheet *ss
       if (object_orig->mode == OB_MODE_EDIT) {
         if (const BMEditMesh *em = mesh->edit_mesh) {
           Mesh *new_mesh = (Mesh *)BKE_id_new_nomain(ID_ME, nullptr);
-          /* This is a potentially heavy operation to do on every redraw. The best solution here is

@@ -43,6 +43,7 @@ class GeometryDataSource : public DataSource {
   const bke::GeometrySet geometry_set_;
   const bke::GeometryComponent *component_;
   eAttrDomain domain_;
+  const int component_index_;

@@ -38,6 +41,15 @@ class GeometryDataSetTreeViewItem : public ui::AbstractTreeViewItem {
                               StringRef label,
                               BIFIconID icon);
   GeometryDataSetTreeViewItem(bke::GeometryComponent::Type component_type,
+                              int component_index,