Merge pull request #24506 from JFonS/expose_gizmos

Expose the new gizmo plugin system to scripting

scene/3d/mesh_instance.cpp

@@ -138,6 +138,8 @@ void MeshInstance::set_mesh(const Ref<Mesh> &p_mesh) {
 		set_base(RID());
 	}
 
+	update_gizmo();
+
 	_change_notify();
 }
 Ref<Mesh> MeshInstance::get_mesh() const {

scene/3d/spatial.cpp

@@ -32,6 +32,7 @@
 
 #include "core/engine.h"
 #include "core/message_queue.h"
+#include "scene/main/scene_tree.h"
 #include "scene/main/viewport.h"
 #include "scene/scene_string_names.h"
 
@@ -400,6 +401,8 @@ void Spatial::update_gizmo() {
 #ifdef TOOLS_ENABLED
 	if (!is_inside_world())
 		return;
+	if (!data.gizmo.is_valid())
+		get_tree()->call_group_flags(SceneTree::GROUP_CALL_REALTIME, SceneStringNames::get_singleton()->_spatial_editor_group, SceneStringNames::get_singleton()->_request_gizmo, this);
 	if (!data.gizmo.is_valid())
 		return;
 	if (data.gizmo_dirty)