--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/Common/RtViewerApp.h	Wed Apr 29 22:06:24 2020 +0200
@@ -0,0 +1,180 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 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/>.
+ **/
+
+#include <Framework/Viewport/IViewport.h>
+
+#include <Framework/Loaders/DicomStructureSetLoader.h>
+#include <Framework/Loaders/OrthancMultiframeVolumeLoader.h>
+#include <Framework/Loaders/OrthancSeriesVolumeProgressiveLoader.h>
+#include <Framework/Loaders/ILoadersContext.h>
+#include <Framework/Messages/IMessageEmitter.h>
+#include <Framework/Messages/IObserver.h>
+#include <Framework/Messages/ObserverBase.h>
+#include <Framework/Oracle/OracleCommandExceptionMessage.h>
+#include <Framework/Scene2DViewport/ViewportController.h>
+#include <Framework/Volumes/DicomVolumeImage.h>
+
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/thread.hpp>
+#include <boost/noncopyable.hpp>
+
+#if ORTHANC_ENABLE_SDL
+#include <SDL.h>
+#endif
+
+namespace OrthancStone
+{
+  class OpenGLCompositor;
+  class IVolumeSlicer;
+  class ILayerStyleConfigurator;
+  class DicomStructureSetLoader;
+  class IOracle;
+  class ThreadedOracle;
+  class VolumeSceneLayerSource;
+  class SdlOpenGLViewport;
+  class RtViewerView;
+   
+  enum RtViewerGuiTool
+  {
+    RtViewerGuiTool_Rotate = 0,
+    RtViewerGuiTool_Pan,
+    RtViewerGuiTool_Zoom,
+    RtViewerGuiTool_LineMeasure,
+    RtViewerGuiTool_CircleMeasure,
+    RtViewerGuiTool_AngleMeasure,
+    RtViewerGuiTool_EllipseMeasure,
+    RtViewerGuiTool_LAST
+  };
+
+  const char* MeasureToolToString(size_t i);
+
+  static const unsigned int FONT_SIZE_0 = 32;
+  static const unsigned int FONT_SIZE_1 = 24;
+
+  class Scene2D;
+  class UndoStack;
+
+  /**
+  This application subclasses IMessageEmitter to use a mutex before forwarding Oracle messages (that
+  can be sent from multiple threads)
+  */
+  class RtViewerApp : public ObserverBase<RtViewerApp>
+  {
+  public:
+
+    void PrepareScene();
+
+#if ORTHANC_ENABLE_SDL
+  public:
+    void RunSdl(int argc, char* argv[]);
+  private:
+    void ProcessOptions(int argc, char* argv[]);
+    void HandleApplicationEvent(const SDL_Event& event);
+#elif ORTHANC_ENABLE_WASM
+  public:
+    void RunWasm();
+#else
+#  error Either ORTHANC_ENABLE_SDL or ORTHANC_ENABLE_WASM must be enabled
+#endif
+
+  public:
+    void DisableTracker();
+
+    /**
+    Called by command-line option processing or when parsing the URL 
+    parameters.
+    */
+    void SetArgument(const std::string& key, const std::string& value);
+
+    const VolumeImageGeometry& GetMainGeometry();
+
+    static boost::shared_ptr<RtViewerApp> Create();
+
+    void CreateView(const std::string& canvasId, VolumeProjection projection);
+
+  protected:
+    RtViewerApp();
+
+  private:
+    void CreateLoaders();
+    void StartLoaders();
+    void SelectNextTool();
+
+    // argument handling
+    // SetArgument is above (public section)
+    std::map<std::string, std::string> arguments_;
+
+    const std::string& GetArgument(const std::string& key) const;
+    bool HasArgument(const std::string& key) const;
+
+    /**
+      This adds the command at the top of the undo stack
+    */
+    //void Commit(boost::shared_ptr<TrackerCommand> cmd);
+    void Undo();
+    void Redo();
+
+    void HandleGeometryReady(const DicomVolumeImage::GeometryReadyMessage& message);
+    
+    // TODO: wire this
+    void HandleCTLoaded(const OrthancSeriesVolumeProgressiveLoader::VolumeImageReadyInHighQuality& message);
+    void HandleCTContentUpdated(const OrthancStone::DicomVolumeImage::ContentUpdatedMessage& message);
+    void HandleDoseLoaded(const OrthancStone::DicomVolumeImage::ContentUpdatedMessage& message);
+    void HandleStructuresReady(const OrthancStone::DicomStructureSetLoader::StructuresReady& message);
+    void HandleStructuresUpdated(const OrthancStone::DicomStructureSetLoader::StructuresUpdated& message);
+
+
+  private:
+    void RetrieveGeometry();
+    void FitContent();
+    void InvalidateAllViewports();
+    void UpdateLayersInAllViews();
+
+  private:
+    boost::shared_ptr<DicomVolumeImage>  ctVolume_;
+    boost::shared_ptr<DicomVolumeImage>  doseVolume_;
+
+    std::vector<boost::shared_ptr<RtViewerView> >  views_;
+
+    boost::shared_ptr<OrthancSeriesVolumeProgressiveLoader> ctLoader_;
+    boost::shared_ptr<OrthancMultiframeVolumeLoader> doseLoader_;
+    boost::shared_ptr<DicomStructureSetLoader>  rtstructLoader_;
+
+    /** encapsulates resources shared by loaders */
+    boost::shared_ptr<ILoadersContext>                  loadersContext_;
+
+    /**
+    another interface to the ctLoader object (that also implements the IVolumeSlicer interface), that serves as the 
+    reference for the geometry (position and dimensions of the volume + size of each voxel). It could be changed to be 
+    the dose instead, but the CT is chosen because it usually has a better spatial resolution.
+    */
+    boost::shared_ptr<OrthancStone::IGeometryProvider>  geometryProvider_;
+
+
+    boost::shared_ptr<IFlexiblePointerTracker> activeTracker_;
+
+    RtViewerGuiTool currentTool_;
+    boost::shared_ptr<UndoStack> undoStack_;
+  };
+
+}
+
+
+ 
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