--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Viewport/IViewport.h	Fri Oct 14 15:34:11 2016 +0200
@@ -0,0 +1,97 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#include "../Toolbox/IThreadSafety.h"
+#include "IStatusBar.h"
+#include "../Enumerations.h"
+
+#include "../Orthanc/Core/Images/ImageAccessor.h"
+
+namespace OrthancStone
+{
+  // This class must be thread-safe
+  class IViewport : public IThreadSafe
+  {
+  public:
+    class IChangeObserver : public boost::noncopyable
+    {
+    public:
+      virtual ~IChangeObserver()
+      {
+      }
+
+      virtual void NotifyChange(const IViewport& scene) = 0;
+    };
+
+    virtual void Register(IChangeObserver& observer) = 0;
+
+    virtual void Unregister(IChangeObserver& observer) = 0;
+
+    virtual void SetStatusBar(IStatusBar& statusBar) = 0;
+
+    virtual void ResetStatusBar() = 0;
+
+    virtual void Start() = 0;
+
+    virtual void Stop() = 0;
+
+    virtual void SetSize(unsigned int width,
+                         unsigned int height) = 0;
+
+    // The function returns "true" iff. a new frame was rendered
+    virtual bool Render(Orthanc::ImageAccessor& surface) = 0;
+
+    virtual void MouseDown(MouseButton button,
+                           int x,
+                           int y,
+                           KeyboardModifiers modifiers) = 0;
+
+    virtual void MouseUp() = 0;
+
+    virtual void MouseMove(int x, 
+                           int y) = 0;
+
+    virtual void MouseEnter() = 0;
+
+    virtual void MouseLeave() = 0;
+
+    virtual void MouseWheel(MouseWheelDirection direction,
+                            int x,
+                            int y,
+                            KeyboardModifiers modifiers) = 0;
+
+    virtual void KeyPressed(char key,
+                            KeyboardModifiers modifiers) = 0;
+  };
+}