--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Volumes/IVolumeLoader.h	Thu Nov 16 13:46:03 2017 +0100
@@ -0,0 +1,53 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017 Osimis, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include <boost/noncopyable.hpp>
+
+namespace OrthancStone
+{
+  class IVolumeLoader : public boost::noncopyable
+  {
+  public:
+    class IObserver : public boost::noncopyable
+    {
+    public:
+      virtual ~IObserver()
+      {
+      }
+      
+      virtual void NotifyGeometryReady(const IVolumeLoader& loader) = 0;
+      
+      virtual void NotifyGeometryError(const IVolumeLoader& loader) = 0;
+      
+      // Triggered if the content of several slices in the loader has
+      // changed
+      virtual void NotifyContentChange(const IVolumeLoader& loader) = 0;
+    };
+    
+    virtual ~IVolumeLoader()
+    {
+    }
+
+    virtual void Register(IObserver& observer) = 0;
+  };
+}