The GtkRadiant sources as originally released under the GPL license.

include/preferencesystem.h

@@ -0,0 +1,57 @@
+/*
+Copyright (C) 2001-2006, William Joseph.
+All Rights Reserved.
+
+This file is part of GtkRadiant.
+
+GtkRadiant 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.
+
+GtkRadiant 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 GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if !defined(INCLUDED_PREFERENCESYSTEM_H)
+#define INCLUDED_PREFERENCESYSTEM_H
+
+#include "generic/constant.h"
+
+template<typename FirstArgument>
+class Callback1;
+typedef Callback1<const char*> StringImportCallback;
+typedef Callback1<const StringImportCallback&> StringExportCallback;
+
+class PreferenceSystem
+{
+public:
+  INTEGER_CONSTANT(Version, 1);
+  STRING_CONSTANT(Name, "preferences");
+
+  virtual void registerPreference(const char* name, const StringImportCallback& importer, const StringExportCallback& exporter) = 0;
+};
+
+#include "modulesystem.h"
+
+template<typename Type>
+class GlobalModule;
+typedef GlobalModule<PreferenceSystem> GlobalPreferenceSystemModule;
+
+template<typename Type>
+class GlobalModuleRef;
+typedef GlobalModuleRef<PreferenceSystem> GlobalPreferenceSystemModuleRef;
+
+inline PreferenceSystem& GlobalPreferenceSystem()
+{
+  return GlobalPreferenceSystemModule::getTable();
+}
+
+
+#endif