--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Deprecated/Radiography/RadiographyLayerRotateTracker.cpp	Wed Apr 29 20:43:09 2020 +0200
@@ -0,0 +1,156 @@
+/**
+ * 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 "RadiographyLayerRotateTracker.h"
+
+#include "RadiographySceneCommand.h"
+
+#include <Core/OrthancException.h>
+
+#include <boost/math/constants/constants.hpp>
+#include <boost/math/special_functions/round.hpp>
+
+namespace OrthancStone
+{
+  class RadiographyLayerRotateTracker::UndoRedoCommand : public RadiographySceneCommand
+  {
+  private:
+    double  sourceAngle_;
+    double  targetAngle_;
+
+    static int ToDegrees(double angle)
+    {
+      return boost::math::iround(angle * 180.0 / boost::math::constants::pi<double>());
+    }
+      
+  protected:
+    virtual void UndoInternal(RadiographyLayer& layer) const
+    {
+      LOG(INFO) << "Undo - Set angle to " << ToDegrees(sourceAngle_) << " degrees";
+      layer.SetAngle(sourceAngle_);
+    }
+
+    virtual void RedoInternal(RadiographyLayer& layer) const
+    {
+      LOG(INFO) << "Redo - Set angle to " << ToDegrees(sourceAngle_) << " degrees";
+      layer.SetAngle(targetAngle_);
+    }
+
+  public:
+    UndoRedoCommand(const RadiographyLayerRotateTracker& tracker) :
+      RadiographySceneCommand(tracker.accessor_),
+      sourceAngle_(tracker.originalAngle_),
+      targetAngle_(tracker.accessor_.GetLayer().GetGeometry().GetAngle())
+    {
+    }
+  };
+
+
+  bool RadiographyLayerRotateTracker::ComputeAngle(double& angle /* out */,
+                                                   double sceneX,
+                                                   double sceneY) const
+  {
+    Vector u;
+    LinearAlgebra::AssignVector(u, sceneX - centerX_, sceneY - centerY_);
+
+    double nu = boost::numeric::ublas::norm_2(u);
+
+    if (!LinearAlgebra::IsCloseToZero(nu))
+    {
+      u /= nu;
+      angle = atan2(u[1], u[0]);
+      return true;
+    }
+    else
+    {
+      return false;
+    }
+  }
+
+
+  RadiographyLayerRotateTracker::RadiographyLayerRotateTracker(UndoRedoStack& undoRedoStack,
+                                                               RadiographyScene& scene,
+                                                               const Deprecated::ViewportGeometry& view,
+                                                               size_t layer,
+                                                               double x,
+                                                               double y,
+                                                               bool roundAngles) :
+    undoRedoStack_(undoRedoStack),
+    accessor_(scene, layer),
+    roundAngles_(roundAngles)
+  {
+    if (accessor_.IsValid())
+    {
+      accessor_.GetLayer().GetCenter(centerX_, centerY_);
+      originalAngle_ = accessor_.GetLayer().GetGeometry().GetAngle();
+
+      double sceneX, sceneY;
+      view.MapDisplayToScene(sceneX, sceneY, x, y);
+
+      if (!ComputeAngle(clickAngle_, x, y))
+      {
+        accessor_.Invalidate();
+      }
+    }
+  }
+
+
+  void RadiographyLayerRotateTracker::Render(CairoContext& context,
+                                             double zoom)
+  {
+    throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+  }
+
+
+  void RadiographyLayerRotateTracker::MouseUp()
+  {
+    if (accessor_.IsValid())
+    {
+      undoRedoStack_.Add(new UndoRedoCommand(*this));
+    }
+  }
+
+  
+  void RadiographyLayerRotateTracker::MouseMove(int displayX,
+                                                int displayY,
+                                                double sceneX,
+                                                double sceneY,
+                                                const std::vector<Deprecated::Touch>& displayTouches,
+                                                const std::vector<Deprecated::Touch>& sceneTouches)
+  {
+    static const double ROUND_ANGLE = 15.0 / 180.0 * boost::math::constants::pi<double>(); 
+        
+    double angle;
+        
+    if (accessor_.IsValid() &&
+        ComputeAngle(angle, sceneX, sceneY))
+    {
+      angle = angle - clickAngle_ + originalAngle_;
+
+      if (roundAngles_)
+      {
+        angle = boost::math::round<double>((angle / ROUND_ANGLE) * ROUND_ANGLE);
+      }
+          
+      accessor_.GetLayer().SetAngle(angle);
+    }
+  }
+}