--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Scene2D/PointerEvent.cpp	Fri Apr 26 17:05:14 2019 +0200
@@ -0,0 +1,69 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 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 "PointerEvent.h"
+
+#include <Core/OrthancException.h>
+
+namespace OrthancStone
+{
+  PointerEvent::PointerEvent() :
+    hasAltModifier_(false),
+    hasControlModifier_(false),
+    hasShiftModifier_(false)
+  {
+  }
+
+  
+  ScenePoint2D PointerEvent::GetMainPosition() const
+  {
+    if (positions_.empty())
+    {
+      return ScenePoint2D(0, 0);
+    }
+    else
+    {
+      return positions_[0];
+    }
+  }
+    
+
+  // Add the center of the pixel
+  void PointerEvent::AddIntegerPosition(int x,
+                                        int y)
+  {
+    AddPosition(static_cast<double>(x) + 0.5,
+                static_cast<double>(y) + 0.5);
+  }
+    
+    
+  ScenePoint2D PointerEvent::GetPosition(size_t index) const
+  {
+    if (index < positions_.size())
+    {
+      return positions_[index];
+    }
+    else
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
+    }
+  }
+}