use separate queue that is synchronous

while the documentation suggests this, getUpdateQueue returns the global
callback queue which might be processed in different threads if
AsyncSpinner is used or other threads call ros::spinOnce

Author: simonschmeisser

src/rviz/visualization_manager.cpp

@@ -111,6 +111,7 @@ class VisualizationManagerPrivate
 {
 public:
   ros::CallbackQueue threaded_queue_;
+  ros::CallbackQueue update_queue_;
   boost::thread_group threaded_queue_threads_;
   ros::NodeHandle update_nh_;
   ros::NodeHandle threaded_nh_;
@@ -286,7 +287,7 @@ void VisualizationManager::unlockRender()
 
 ros::CallbackQueueInterface* VisualizationManager::getUpdateQueue()
 {
-  return ros::getGlobalCallbackQueue();
+  return &private_->update_queue_;
 }
 
 void VisualizationManager::startUpdate()
@@ -344,7 +345,7 @@ void VisualizationManager::onUpdate()
     resetTime();
   }
 
-  ros::spinOnce();
+  private_->update_queue_.callAvailable(ros::WallDuration(0.01));
 
   Q_EMIT preUpdate();