Airframe loader: Add commented-out code to load XML format from param class

src/AutoPilotPlugins/PX4/PX4AirframeLoader.h

+/*=====================================================================
+
+ QGroundControl Open Source Ground Control Station
+
+ (c) 2009 - 2015 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+
+ This file is part of the QGROUNDCONTROL project
+
+ QGROUNDCONTROL 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.
+
+ QGROUNDCONTROL 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 QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.
+
+ ======================================================================*/
+
 #ifndef PX4AIRFRAMELOADER_H
 #define PX4AIRFRAMELOADER_H
 
 #include <QObject>
+#include <QMap>
+#include <QXmlStreamReader>
+#include <QLoggingCategory>
 
-class PX4AirframeLoader
+#include "ParameterLoader.h"
+#include "FactSystem.h"
+#include "UASInterface.h"
+#include "AutoPilotPlugin.h"
+
+/// @file PX4AirframeLoader.h
+///     @author Lorenz Meier <lm@qgroundcontrol.org>
+
+Q_DECLARE_LOGGING_CATEGORY(PX4AirframeLoaderLog)
+
+/// Collection of Parameter Facts for PX4 AutoPilot
+
+class PX4AirframeLoader : QObject
 {
+    Q_OBJECT
+
 public:
-    PX4AirframeLoader();
-    ~PX4AirframeLoader();
+    /// @param uas Uas which this set of facts is associated with
+    PX4AirframeLoader(AutoPilotPlugin* autpilot,UASInterface* uas, QObject* parent = NULL);
+
+    static void loadAirframeFactMetaData(void);
+    static void clearStaticData(void);
+
+private:
+    enum {
+        XmlStateNone,
+        XmlStateFoundAirframes,
+        XmlStateFoundVersion,
+        XmlStateFoundGroup,
+        XmlStateFoundAirframe,
+        XmlStateDone
+    };
+
+    static bool _airframeMetaDataLoaded;   ///< true: parameter meta data already loaded
+    static QMap<QString, FactMetaData*> _mapParameterName2FactMetaData; ///< Maps from a parameter name to FactMetaData
 };
 
 #endif // PX4AIRFRAMELOADER_H