--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Layers/VolumeSlicerBase.h	Sat Nov 10 09:29:08 2018 +0100
@@ -0,0 +1,54 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 Osimis S.A., 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 "IVolumeSlicer.h"
+#include "../Toolbox/ObserversRegistry.h"
+
+namespace OrthancStone
+{
+  class SmartLoader;
+
+  class VolumeSlicerBase : public IVolumeSlicer
+  {
+  protected:
+    void NotifyGeometryReady();
+    
+    void NotifyGeometryError();
+
+    void NotifyContentChange();
+
+    void NotifySliceChange(const Slice& slice);
+
+    void NotifyLayerReady(const LayerReadyMessage::IRendererFactory& factory,
+                          const CoordinateSystem3D& slice);
+
+    void NotifyLayerError(const CoordinateSystem3D& slice);
+
+    VolumeSlicerBase(MessageBroker& broker) :
+      IVolumeSlicer(broker)
+    {
+    }
+
+    friend class SmartLoader;
+  };
+}