--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Applications/Samples/SingleFrameEditorApplication.h	Tue Oct 16 11:30:00 2018 +0200
@@ -0,0 +1,241 @@
+/**
+ * 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 "SampleApplicationBase.h"
+
+#include "../../Framework/Layers/OrthancFrameLayerSource.h"
+#include "../../Framework/Widgets/LayerWidget.h"
+
+#include <Core/Logging.h>
+
+namespace OrthancStone
+{
+  namespace Samples
+  {
+    class SingleFrameEditorApplication :
+        public SampleApplicationBase,
+        public IObserver
+    {
+      enum Tools
+      {
+        Tools_Crop,
+        Tools_Windowing,
+        Tools_Zoom,
+        Tools_Pan
+      };
+
+      enum Actions
+      {
+        Actions_Invert,
+        Actions_RotateLeft,
+        Actions_RotateRight
+      };
+
+    private:
+      class Interactor : public IWorldSceneInteractor
+      {
+      private:
+        SingleFrameEditorApplication&  application_;
+        
+      public:
+        Interactor(SingleFrameEditorApplication&  application) :
+          application_(application)
+        {
+        }
+        
+        virtual IWorldSceneMouseTracker* CreateMouseTracker(WorldSceneWidget& widget,
+                                                            const ViewportGeometry& view,
+                                                            MouseButton button,
+                                                            KeyboardModifiers modifiers,
+                                                            double x,
+                                                            double y,
+                                                            IStatusBar* statusBar)
+        {
+          switch (application_.currentTool_) {
+          case Tools_Crop:
+          case Tools_Windowing:
+          case Tools_Zoom:
+          case Tools_Pan:
+            // TODO return the right mouse tracker
+            return NULL;
+          }
+
+          return NULL;
+        }
+
+        virtual void MouseOver(CairoContext& context,
+                               WorldSceneWidget& widget,
+                               const ViewportGeometry& view,
+                               double x,
+                               double y,
+                               IStatusBar* statusBar)
+        {
+          if (statusBar != NULL)
+          {
+            Vector p = dynamic_cast<LayerWidget&>(widget).GetSlice().MapSliceToWorldCoordinates(x, y);
+            
+            char buf[64];
+            sprintf(buf, "X = %.02f Y = %.02f Z = %.02f (in cm)",
+                    p[0] / 10.0, p[1] / 10.0, p[2] / 10.0);
+            statusBar->SetMessage(buf);
+          }
+        }
+
+        virtual void MouseWheel(WorldSceneWidget& widget,
+                                MouseWheelDirection direction,
+                                KeyboardModifiers modifiers,
+                                IStatusBar* statusBar)
+        {
+        }
+
+        virtual void KeyPressed(WorldSceneWidget& widget,
+                                char key,
+                                KeyboardModifiers modifiers,
+                                IStatusBar* statusBar)
+        {
+          switch (key)
+          {
+          case 's':
+            widget.SetDefaultView();
+            break;
+          case 'p':
+            application_.currentTool_ = Tools_Pan;
+            break;
+          case 'z':
+            application_.currentTool_ = Tools_Zoom;
+            break;
+          case 'c':
+            application_.currentTool_ = Tools_Crop;
+            break;
+          case 'w':
+            application_.currentTool_ = Tools_Windowing;
+            break;
+          case 'i':
+            application_.Invert();
+            break;
+          case 'r':
+            if (modifiers == KeyboardModifiers_None)
+              application_.Rotate(90);
+            else
+              application_.Rotate(-90);
+            break;
+          case 'e':
+            application_.Export();
+            break;
+          default:
+            break;
+          }
+        }
+      };
+
+      void OnMainWidgetGeometryReady(const ILayerSource::GeometryReadyMessage& message)
+      {
+        mainWidget_->SetDefaultView();
+      }
+      
+      LayerWidget*                          mainWidget_;   // ownership is transfered to the application context
+      std::unique_ptr<Interactor>           mainWidgetInteractor_;
+      std::unique_ptr<OrthancApiClient>     orthancApiClient_;
+      Tools                                 currentTool_;
+
+      const OrthancFrameLayerSource*        source_;
+      unsigned int                          slice_;
+
+    public:
+      SingleFrameEditorApplication(MessageBroker& broker) :
+        IObserver(broker),
+        currentTool_(Tools_Zoom),
+        source_(NULL),
+        slice_(0)
+      {
+      }
+      
+      virtual void DeclareStartupOptions(boost::program_options::options_description& options)
+      {
+        boost::program_options::options_description generic("Sample options");
+        generic.add_options()
+            ("instance", boost::program_options::value<std::string>(),
+             "Orthanc ID of the instance")
+            ("frame", boost::program_options::value<unsigned int>()->default_value(0),
+             "Number of the frame, for multi-frame DICOM instances")
+            ;
+
+        options.add(generic);
+      }
+
+      virtual void Initialize(StoneApplicationContext* context,
+                              IStatusBar& statusBar,
+                              const boost::program_options::variables_map& parameters)
+      {
+        using namespace OrthancStone;
+
+        context_ = context;
+
+        statusBar.SetMessage("Use the key \"s\" to reinitialize the layout, \"p\" to pan, \"z\" to zoom, \"c\" to crop, \"i\" to invert, \"w\" to change windowing, \"r\" to rotate cw,  \"shift+r\" to rotate ccw");
+
+        if (parameters.count("instance") != 1)
+        {
+          LOG(ERROR) << "The instance ID is missing";
+          throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+        }
+
+        std::string instance = parameters["instance"].as<std::string>();
+        int frame = parameters["frame"].as<unsigned int>();
+
+        orthancApiClient_.reset(new OrthancApiClient(IObserver::broker_, context_->GetWebService()));
+        mainWidget_ = new LayerWidget(broker_, "main-widget");
+
+        std::auto_ptr<OrthancFrameLayerSource> layer(new OrthancFrameLayerSource(broker_, *orthancApiClient_));
+        source_ = layer.get();
+        layer->LoadFrame(instance, frame);
+        layer->RegisterObserverCallback(new Callable<SingleFrameEditorApplication, ILayerSource::GeometryReadyMessage>(*this, &SingleFrameEditorApplication::OnMainWidgetGeometryReady));
+        mainWidget_->AddLayer(layer.release());
+
+        mainWidget_->SetTransmitMouseOver(true);
+
+        mainWidgetInteractor_.reset(new Interactor(*this));
+        mainWidget_->SetInteractor(*mainWidgetInteractor_);
+      }
+
+      virtual void Finalize() {}
+      virtual IWidget* GetCentralWidget() {return mainWidget_;}
+
+      void Invert()
+      {
+        // TODO
+      }
+
+      void Rotate(int degrees)
+      {
+        // TODO
+      }
+
+      void Export()
+      {
+        // TODO: export dicom file to a temporary file
+      }
+    };
+
+
+  }
+}