Depsgraph: Get away from legacy API used in event loop

A bit tricky for now, needs some clear design about when to do
on_visible_changed().

source/blender/depsgraph/intern/depsgraph_build.cc

@@ -206,6 +206,14 @@ void DEG_graph_build_from_scene(Depsgraph *graph, Main *bmain, Scene *scene)
 
 	DEG::Depsgraph *deg_graph = reinterpret_cast<DEG::Depsgraph *>(graph);
 
+	/* TODO(sergey): This is a bit tricky, but ensures that all the data
+	 * is evaluated properly when depsgraph is becoming "visible".
+	 *
+	 * This now could happen for both visible scene is changed and extra
+	 * dependency graph was created for render engine.
+	 */
+	const bool need_on_visible_update = (deg_graph->scene == NULL);
+
 	/* 1) Generate all the nodes in the graph first */
 	DEG::DepsgraphNodeBuilder node_builder(bmain, deg_graph);
 	node_builder.begin_build(bmain);
@@ -249,6 +257,10 @@ void DEG_graph_build_from_scene(Depsgraph *graph, Main *bmain, Scene *scene)
 
 	/* Relations are up to date. */
 	deg_graph->need_update = false;
+
+	if (need_on_visible_update) {
+		DEG_graph_on_visible_update(bmain, graph);
+	}
 }
 
 /* Tag graph relations for update. */

source/blender/windowmanager/intern/wm_event_system.c

@@ -84,6 +84,8 @@
 
 #include "RNA_enum_types.h"
 
+#include "DEG_depsgraph.h"
+
 /* Motion in pixels allowed before we don't consider single/double click. */
 #define WM_EVENT_CLICK_WIGGLE_ROOM 2
 
@@ -309,7 +311,13 @@ void wm_event_do_refresh_wm_and_depsgraph(bContext *C)
 			/* XXX, hack so operators can enforce datamasks [#26482], gl render */
 			scene->customdata_mask |= scene->customdata_mask_modal;
 
-			BKE_scene_update_tagged(bmain->eval_ctx, bmain, scene);
+			for (SceneLayer *scene_layer = scene->render_layers.first;
+			     scene_layer != NULL;
+			     scene_layer = scene_layer->next)
+			{
+				Depsgraph *depsgraph = BKE_scene_get_depsgraph(scene, scene_layer, true);
+				BKE_scene_graph_update_tagged(bmain->eval_ctx, depsgraph, bmain, scene);
+			}
 		}
 	}