diff --git a/src/src/Interaction/ActorDraggableInteractorStyle.cpp b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
index 7732f8f..788d5ea 100644
--- a/src/src/Interaction/ActorDraggableInteractorStyle.cpp
+++ b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
@@ -408,10 +408,6 @@ void ActorDraggableInteractorStyle::WindowLevel() {
     this->WindowLevelCurrentPosition[0] = rwi->GetEventPosition()[0];
     this->WindowLevelCurrentPosition[1] = rwi->GetEventPosition()[1];
 
-    if (this->HandleObservers &&
-        this->HasObserver(vtkCommand::WindowLevelEvent)) {
-        this->InvokeEvent(vtkCommand::WindowLevelEvent, this);
-    }
     if (this->CurrentImageProperty) {
         int *size = this->CurrentRenderer->GetSize();
 
@@ -460,6 +456,10 @@ void ActorDraggableInteractorStyle::WindowLevel() {
         this->CurrentImageProperty->SetColorLevel(newLevel);
 
         this->Interactor->Render();
+        if (this->HandleObservers &&
+            this->HasObserver(vtkCommand::WindowLevelEvent)) {
+            this->InvokeEvent(vtkCommand::WindowLevelEvent, this);
+        }
     }
 }