From cacf50f0a5de4525c4ede227537a8cec8ece16d3 Mon Sep 17 00:00:00 2001
From: Krad <kradchen123@163.com>
Date: Mon, 21 Nov 2022 13:39:12 +0800
Subject: [PATCH] Fix VTK update event handle bug.

---
 src/src/Interaction/ActorDraggableInteractorStyle.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/src/Interaction/ActorDraggableInteractorStyle.cpp b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
index d7b966e..706c2ed 100644
--- a/src/src/Interaction/ActorDraggableInteractorStyle.cpp
+++ b/src/src/Interaction/ActorDraggableInteractorStyle.cpp
@@ -25,7 +25,9 @@
 
 vtkStandardNewMacro(ActorDraggableInteractorStyle)
 
-ActorDraggableInteractorStyle::ActorDraggableInteractorStyle() {
+ActorDraggableInteractorStyle::ActorDraggableInteractorStyle():vtkInteractorStyleImage()
+{
+    HandleObservers = true;
     this->AddObserver(vtkCommand::InteractionEvent, this, &ActorDraggableInteractorStyle::DispatchEvent);
 }