--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Deprecated/Toolbox/ViewportGeometry.h	Tue May 21 14:27:35 2019 +0200
@@ -0,0 +1,110 @@
+/**
+ * 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/>.
+ **/
+
+
+#pragma once
+
+#include "../../Viewport/CairoContext.h"
+#include "../../Toolbox/Extent2D.h"
+#include "../../Toolbox/LinearAlgebra.h"
+#include "../Viewport/IMouseTracker.h"  // to include "Touch" definition
+
+namespace Deprecated
+{
+  class ViewportGeometry
+  {
+  private:
+    // Extent of the scene (in world units)
+    OrthancStone::Extent2D   sceneExtent_;
+
+    // Size of the display (in pixels)
+    unsigned int  width_;
+    unsigned int  height_;
+
+    // Zoom/pan
+    double   zoom_;
+    double   panX_;  // In pixels (display units)
+    double   panY_;
+
+    cairo_matrix_t  transform_;  // Scene-to-display transformation
+
+    void ComputeTransform();
+
+  public:
+    ViewportGeometry();
+
+    void SetDisplaySize(unsigned int width,
+                        unsigned int height);
+
+    void SetSceneExtent(const OrthancStone::Extent2D& extent);
+
+    const OrthancStone::Extent2D& GetSceneExtent() const
+    {
+      return sceneExtent_;
+    }
+
+    void MapDisplayToScene(double& sceneX /* out */,
+                           double& sceneY /* out */,
+                           double x,
+                           double y) const;
+
+    void MapPixelCenterToScene(double& sceneX /* out */,
+                               double& sceneY /* out */,
+                               int x,
+                               int y) const;
+
+    void MapPixelCenterToScene(std::vector<Touch>& sceneTouches /* out */,
+                               const std::vector<Touch>& displayTouches) const;
+
+    void MapSceneToDisplay(int& displayX /* out */,
+                           int& displayY /* out */,
+                           double x,
+                           double y) const;
+
+    unsigned int GetDisplayWidth() const
+    {
+      return width_;
+    }
+
+    unsigned int GetDisplayHeight() const
+    {
+      return height_;
+    }
+
+    double GetZoom() const
+    {
+      return zoom_;
+    }
+
+    void FitContent();
+
+    void ApplyTransform(OrthancStone::CairoContext& context) const;
+
+    void GetPan(double& x,
+                double& y) const;
+
+    void SetPan(double x,
+                double y);
+
+    void SetZoom(double zoom);
+
+    OrthancStone::Matrix GetMatrix() const;
+  };
+}