[FIX] Fixed HelloWorldOgre and HelloWorldOgreAdvanced

The window did not close when clicking on the [x] button of the window. Now it works

modules/ar/include/visp3/ar/vpAROgre.h

@@ -302,7 +302,9 @@ class VISP_EXPORT vpAROgre : public Ogre::FrameListener,
     mWindow->reposition(static_cast<int>(win_x), static_cast<int>(win_y));
   }
 
-  virtual void windowClosed(Ogre::RenderWindow *rw);
+  virtual bool windowClosing(Ogre::RenderWindow *rw) VP_OVERRIDE;
+
+  virtual void windowClosed(Ogre::RenderWindow *rw) VP_OVERRIDE;
 
 protected:
   virtual void init(bool bufferedKeys = false, bool hidden = false);

modules/ar/src/ogre-simulator/vpAROgre.cpp

@@ -536,6 +536,7 @@ void vpAROgre::init(bool
 
   // Register as a Window listener
   OgreWindowEventUtilities::addWindowEventListener(mWindow, this);
+  OgreWindowEventUtilities::_addRenderWindow(mWindow);
 
 #ifdef VISP_HAVE_OIS
   // Initialise OIS
@@ -714,6 +715,21 @@ bool vpAROgre::customframeStarted(const Ogre::FrameEvent & /*evt*/)
 */
 bool vpAROgre::customframeEnded(const Ogre::FrameEvent & /*evt*/) { return true; }
 
+/**
+ * \brief Check if the window that is currently closing is the one attached to the object.
+ *
+ * \param[in] rw The RenderWindow that is closing.
+ * \return true It corresponds to the vpAROgre object.
+ * \return false It is another window that is closing.
+ */
+bool vpAROgre::windowClosing(Ogre::RenderWindow *rw)
+{
+  if (rw == mWindow) {
+    keepOn = false;
+  }
+  return !keepOn;
+}
+
 /*!
 
   Unattach OIS (Object-oriented Input System library) before window shutdown