fix: Synchronize pipeline manager render window to LayerDM

- Ensure the pipeline manager renderer and render window are
  synchronized to the LayerDM in case it's changed.
- Fix NodeReferenceObserverTest.cxx missing node registration

Author: Thibault-Pelletier

LayerDM/MRMLDM/vtkMRMLLayerDisplayableManager.cxx

@@ -182,6 +182,18 @@ void vtkMRMLLayerDisplayableManager::Create()
   this->UpdateFromMRML();
 }
 
+void vtkMRMLLayerDisplayableManager::SetRenderer(vtkRenderer* newRenderer)
+{
+  Superclass::SetRenderer(newRenderer);
+  if (!this->m_pipelineManager)
+  {
+    return;
+  }
+
+  this->m_pipelineManager->SetRenderWindow(newRenderer ? newRenderer->GetRenderWindow() : nullptr);
+  this->m_pipelineManager->SetRenderer(newRenderer);
+}
+
 void vtkMRMLLayerDisplayableManager::SetHasFocus(bool hasFocus, vtkMRMLInteractionEventData* eventData)
 {
   Superclass ::SetHasFocus(hasFocus, eventData);

LayerDM/MRMLDM/vtkMRMLLayerDisplayableManager.h

@@ -63,6 +63,7 @@ class VTK_SLICER_LAYERDM_MODULE_MRMLDISPLAYABLEMANAGER_EXPORT vtkMRMLLayerDispla
   void operator=(const vtkMRMLLayerDisplayableManager&) = delete;
 
   void Create() override;
+  void SetRenderer(vtkRenderer* newRenderer) override;
 
   void OnMRMLDisplayableNodeModifiedEvent(vtkObject* caller) override;
   void OnMRMLSceneStartBatchProcess() override;

LayerDM/Testing/Cxx/NodeReferenceObserverTest.cxx

@@ -11,6 +11,8 @@
 #include <vtkSmartPointer.h>
 
 // CTK includes
+#include "vtkSlicerLayerDMLogic.h"
+
 #include <ctkTest.h>
 
 namespace
@@ -199,6 +201,7 @@ private slots:
   void testTriggersAddedWhenSettingAlreadyExistingScene() const
   {
     auto scene = vtkSmartPointer<vtkMRMLScene>::New();
+    vtkSlicerLayerDMLogic::RegisterNodeIfNeeded<vtkMRMLMarkupsFiducialDisplayNode>(scene);
     auto markups = vtkMRMLMarkupsFiducialNode::SafeDownCast(scene->AddNode(vtkNew<vtkMRMLMarkupsFiducialNode>{}));
     markups->CreateDefaultDisplayNodes();
 
@@ -217,6 +220,8 @@ private slots:
   void testNodesRemovedFromSceneAreCorrectlyRemovedFromObserver()
   {
     auto scene = vtkSmartPointer<vtkMRMLScene>::New();
+    vtkSlicerLayerDMLogic::RegisterNodeIfNeeded<vtkMRMLMarkupsFiducialDisplayNode>(scene);
+
     auto markups = vtkMRMLMarkupsFiducialNode::SafeDownCast(scene->AddNode(vtkNew<vtkMRMLMarkupsFiducialNode>{}));
     markups->CreateDefaultDisplayNodes();