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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.
+//
+
+#include "FGSwitchLayer.hxx"
+
+FGSwitchLayer::FGSwitchLayer () :
+  FGGroupLayer () {
+}
+
+void
+FGSwitchLayer::draw () {
+  if (test ()) {
+    transform ();
+    for (unsigned int i = 0; i < m_layers.size (); ++i) {
+      if (m_layers[i]->test ()) {
+        m_layers[i]->draw ();
+        return;
+      }
+    }
+  }
+}