--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/OrthancStone/Sources/Scene2D/GrayscaleWindowingSceneTracker.h	Fri Aug 07 15:55:59 2020 +0200
@@ -0,0 +1,58 @@
+/**
+ * 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/>.
+ **/
+
+
+#pragma once
+
+
+#include "../Scene2DViewport/OneGesturePointerTracker.h"
+#include "../Viewport/IViewport.h"
+#include "Internals/FixedPointAligner.h"
+
+#include <boost/weak_ptr.hpp>
+
+namespace OrthancStone
+{
+  class GrayscaleWindowingSceneTracker : public OneGesturePointerTracker
+  {
+  private:
+    bool    active_;
+    int     layerIndex_;
+    double  normalization_;
+    float   originalCenter_;
+    float   originalWidth_;
+    double  clickX_;
+    double  clickY_;
+
+    void SetWindowing(float center,
+                      float width);
+    
+  public:
+    GrayscaleWindowingSceneTracker(boost::shared_ptr<IViewport> viewport,
+                                   int layerIndex,
+                                   const PointerEvent& event,
+                                   unsigned int canvasWidth,
+                                   unsigned int canvasHeight);
+
+    virtual void PointerMove(const PointerEvent& event) ORTHANC_OVERRIDE;
+    
+    virtual void Cancel() ORTHANC_OVERRIDE;
+  };
+}