ENH: Inverting GlComponent rendering order

Code/Visualization/otbImageWidget.h

@@ -72,7 +72,7 @@ public:
   typedef typename GlComponentType::PointType           PointType;
   typedef ObjectList<GlComponentType>                   GlComponentListType;
   typedef typename GlComponentListType::Pointer         GlComponentListPointerType;
-  typedef typename GlComponentListType::Iterator        GlComponentIteratorType;
+  typedef typename GlComponentListType::ReverseIterator GlComponentIteratorType;
 
   /** Reads the OpenGl buffer from an image pointer
    *  \param image The image pointer,

Code/Visualization/otbImageWidget.txx

@@ -231,8 +231,8 @@ ImageWidget<TInputImage>
     }
 
   // Render additionnal GlComponents
-  for(GlComponentIteratorType it = m_GlComponents->Begin();
-      it!=m_GlComponents->End();++it)
+  for(GlComponentIteratorType it = m_GlComponents->ReverseBegin();
+      it!=m_GlComponents->ReverseEnd();++it)
     {
     if(it.Get()->GetVisible())
       {