--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Scene2DViewport/PredeclaredTypes.h	Wed May 29 10:51:28 2019 +0200
@@ -0,0 +1,41 @@
+/**
+ * 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 <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+namespace OrthancStone
+
+{
+  class Scene2D;
+  class MeasureTool;
+  class LineMeasureTool;
+  class AngleMeasureTool;
+  class IPointerTracker;
+  class IFlexiblePointerTracker;
+  class CreateMeasureCommand;
+  class CreateLineMeasureCommand;
+  class CreateAngleMeasureCommand;
+  class TrackerCommand;
+  class ViewportController;
+  class LayerHolder;
+}