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+//
+//  Written by David Megginson, started January 2000.
+//  Adopted for standalone fgpanel application by Torsten Dreyer, August 2009
+//
+//  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 2 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
+//  General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#pragma once
+
+#include "FGCroppedTexture.hxx"
+#include "FGInstrumentLayer.hxx"
+#include "FGPanelInstrument.hxx"
+
+
+/**
+ * An instrument constructed of multiple layers.
+ *
+ * Each individual layer can be rotated or shifted to correspond
+ * to internal FGFS instrument readings.
+ */
+class FGLayeredInstrument : public FGPanelInstrument {
+public:
+  FGLayeredInstrument (const int x, const int y, const int w, const int h);
+  virtual ~FGLayeredInstrument ();
+
+  virtual void draw ();
+
+  // Transfer pointer ownership!!
+  virtual int addLayer (FGInstrumentLayer * const layer);
+  virtual int addLayer (const FGCroppedTexture_ptr texture, const int w = -1, const int h = -1);
+
+  // Transfer pointer ownership!!
+  virtual void addTransformation (FGPanelTransformation * const transformation);
+
+private:
+  typedef std::vector <FGInstrumentLayer *> layer_list;
+  layer_list m_layers;
+};