--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Viewport/IViewport.h	Wed Jul 10 18:18:42 2019 +0200
@@ -0,0 +1,52 @@
+/**
+ * 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 "../Scene2D/Scene2D.h"
+#include "../Scene2D/ScenePoint2D.h"
+
+namespace OrthancStone
+{
+  /**
+   * Class that combines a Scene2D with a canvas where to draw the
+   * scene. A call to "Refresh()" will update the content of the
+   * canvas.
+   **/  
+  class IViewport : public boost::noncopyable
+  {
+  public:
+    virtual ~IViewport()
+    {
+    }
+
+    virtual Scene2D& GetScene() = 0;
+
+    virtual void Refresh() = 0;
+
+    virtual unsigned int GetCanvasWidth() const = 0;
+
+    virtual unsigned int GetCanvasHeight() const = 0;
+
+    virtual const std::string& GetCanvasIdentifier() const = 0;
+
+    virtual ScenePoint2D GetPixelCenterCoordinates(int x, int y) const = 0;
+  };
+}