--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/Common/CreateSimpleTrackerAdapter.cpp	Fri May 10 16:15:55 2019 +0200
@@ -0,0 +1,77 @@
+/**
+ * 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 "IFlexiblePointerTracker.h"
+#include <Framework/Scene2D/IPointerTracker.h>
+
+
+namespace OrthancStone
+{
+  namespace 
+  {
+    class SimpleTrackerAdapter : public IFlexiblePointerTracker
+    {
+    public:
+      SimpleTrackerAdapter(PointerTrackerPtr wrappedTracker)
+        : wrappedTracker_(wrappedTracker)
+        , active_(true)
+      {
+      }
+
+      virtual void PointerMove(const PointerEvent& event) ORTHANC_OVERRIDE
+      {
+        if(active_)
+          wrappedTracker_->Update(event);
+      };
+      virtual void PointerUp(const PointerEvent& event) ORTHANC_OVERRIDE
+      {
+        if (wrappedTracker_)
+        {
+          wrappedTracker_->Release();
+          wrappedTracker_ = NULL;
+        }
+        active_ = false;
+      }
+      virtual void PointerDown(const PointerEvent& event) ORTHANC_OVERRIDE
+      {
+        // nothing to do atm
+      }
+      virtual bool IsActive() const ORTHANC_OVERRIDE
+      {
+        return active_;
+      }
+
+      virtual void Cancel() ORTHANC_OVERRIDE
+      {
+        wrappedTracker_ = NULL;
+        active_ = false;
+      }
+
+    private:
+      PointerTrackerPtr wrappedTracker_;
+      bool active_;
+    };
+  }
+
+  FlexiblePointerTrackerPtr CreateSimpleTrackerAdapter(PointerTrackerPtr t)
+  {
+    return FlexiblePointerTrackerPtr(new SimpleTrackerAdapter(t));
+  }
+}