--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Scene2DViewport/MeasureTools.cpp	Wed May 15 16:56:17 2019 +0200
@@ -0,0 +1,82 @@
+/**
+ * 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 "MeasureTools.h"
+
+#include <Core/Logging.h>
+#include <Core/Enumerations.h>
+#include <Core>
+
+#include <boost/math/constants/constants.hpp>
+
+using namespace Orthanc;
+
+namespace OrthancStone
+{
+
+  MeasureTool::~MeasureTool()
+  {
+
+  }
+
+  void MeasureTool::Enable()
+  {
+    enabled_ = true;
+    RefreshScene();
+  }
+
+  void MeasureTool::Disable()
+  {
+    enabled_ = false;
+    RefreshScene();
+  }
+
+  bool MeasureTool::IsEnabled() const
+  {
+    return enabled_;
+  }
+
+  OrthancStone::Scene2DPtr MeasureTool::GetScene()
+  {
+    Scene2DPtr scene = scene_.lock();
+    if (!scene)
+      throw OrthancException(ErrorCode_InternalError, "Using dead object!");
+    return scene;
+  }
+
+  MeasureTool::MeasureTool(MessageBroker& broker, Scene2DWPtr sceneW)
+    : IObserver(broker)
+    , scene_(sceneW)
+    , enabled_(true)
+  {
+    GetScene()->RegisterObserverCallback(
+      new Callable<MeasureTool, Scene2D::SceneTransformChanged>
+      (*this, &MeasureTool::OnSceneTransformChanged));
+  }
+
+  void MeasureTool::OnSceneTransformChanged(
+    const Scene2D::SceneTransformChanged& message)
+  {
+    RefreshScene();
+  }
+
+
+}
+