ok
that's the code of add_object
Qt Code: 
  1. void OgreWidget::add_object(const Ogre::Vector3 &pos)
  2. {
  3.  
  4. 	Ogre::String name1 = "entity " + Ogre::StringConverter::toString(Ogre::Root::getSingletonPtr()->getTimer()->getMicroseconds());
  5. 	mEntity = ogreSceneManager->createEntity(name1, Ogre::SceneManager:: PT_CUBE);
  6.  
  7.         Ogre::MaterialPtr material1111 = Ogre::MaterialManager::getSingleton().create("green", "General");
  8.  
  9.  
  10.     material1111->getTechnique( 0 )->getPass( 0 )->setAmbient(1, 1, 0);
  11.     mEntity->setMaterial(material1111);
  12. 		Ogre::String name = "Node " + Ogre::StringConverter::toString(Ogre::Root::getSingletonPtr()->getTimer()->getMicroseconds()); // Provides a unique timestamp - the time since the application was started in microseconds.
  13. mNode = ogreSceneManager->getRootSceneNode()->
  14.             createChildSceneNode(name, pos); 
  15.  mNode->attachObject(mEntity);
  16.  count++;
  17.  
  18.  QStandardItem *item=new QStandardItem(QString ("Cube  %0").arg(count));
  19.  
  20.  //model->setItem(count,item);
  21.  model->appendRow(item);
  22.  QListView *listview;
  23.  listview->update();
  24.  
  25. 	ogreRenderWindow->update();
  26.    this->update();
  27.  
  28. 	}
To copy to clipboard, switch view to plain text mode 
i just do that