Saved files location support

- Also renamed QGCCore->QGCApplication to better reflect usage.
- New global qgcApp api to access main QHCApplication singleton

src/QGCCore.h

 /*=====================================================================
-
-PIXHAWK Micro Air Vehicle Flying Robotics Toolkit
-
-(c) 2009, 2010 PIXHAWK PROJECT  <http://pixhawk.ethz.ch>
-
-This file is part of the PIXHAWK project
-
-    PIXHAWK 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.
-
-    PIXHAWK 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 PIXHAWK. If not, see <http://www.gnu.org/licenses/>.
-
-======================================================================*/
+ 
+ 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/>.
+ 
+ ======================================================================*/
 
 /**
  * @file
@@ -30,8 +30,8 @@ This file is part of the PIXHAWK project
  */
 
 
-#ifndef QGC_CORE_H
-#define QGC_CORE_H
+#ifndef QGCAPPLICATION_H
+#define QGCAPPLICATION_H
 
 #include <QApplication>
 
@@ -42,6 +42,7 @@ This file is part of the PIXHAWK project
 #include "OpalLink.h"
 #endif
 
+
 /**
  * @brief The main application and management class.
  *
@@ -49,33 +50,69 @@ This file is part of the PIXHAWK project
  * the central management unit of the groundstation application.
  *
  **/
-class QGCCore : public QApplication
+class QGCApplication : public QApplication
 {
     Q_OBJECT
-
+    
 public:
-    QGCCore(int &argc, char* argv[]);
-    ~QGCCore();
+    QGCApplication(int &argc, char* argv[]);
+    ~QGCApplication();
     
     /// @brief Initialize the applicaation.
     /// @return false: init failed, app should exit
     bool init(void);
     
-    static const char* deleteAllSettingsKey;
-
+    /// @brief Sets the persistent flag to delete all settings the next time QGroundControl is started.
+    void deleteAllSettingsNextBoot(void);
+    
+    /// @brief Clears the persistent flag to delete all settings the next time QGroundControl is started.
+    void clearDeleteAllSettingsNextBoot(void);
+    
+    /// @brief Returns the location of user visible saved file associated with QGroundControl
+    QString savedFilesLocation(void);
+    
+    /// @brief Sets the location of user visible saved file associated with QGroundControl
+    void setSavedFilesLocation(QString& location);
+    
+    /// @brief Location to save and load parameter files from.
+    QString savedParameterFilesLocation(void);
+    
+    /// @brief Location to save and load mavlink log files from
+    QString mavlinkLogFilesLocation(void);
+    
+    /// @brief Validates that the specified location will work for the saved files location.
+    bool validatePossibleSavedFilesLocation(QString& location);
+    
+    /// @brief Returns true is all mavlink connections should be logged
+    bool promptFlightDataSave(void);
+    
+    /// @brief Sets the flag to log all mavlink connections
+    void setPromptFlightDataSave(bool promptForSave);
+    
 protected:
     void startLinkManager();
-
+    
     /**
      * @brief Start the robot managing system
      *
      * The robot manager keeps track of the configured robots.
      **/
     void startUASManager();
-
+    
 private:
     MainWindow* _mainWindow;
-    static const char* _settingsVersionKey;
+    
+    static const char* _settingsVersionKey;             ///< Settings key which hold settings version
+    static const char* _deleteAllSettingsKey;           ///< If this settings key is set on boot, all settings will be deleted
+    static const char* _savedFilesLocationKey;          ///< Settings key for user visible saved files location
+    static const char* _promptFlightDataSave;           ///< Settings key to prompt for saving Flight Data Log for all flights
+    
+    static const char* _defaultSavedFileDirectoryName;      ///< Default name for user visible save file directory
+    static const char* _savedFileMavlinkLogDirectoryName;   ///< Name of mavlink log subdirectory
+    static const char* _savedFileParameterDirectoryName;    ///< Name of parameter subdirectory
 };
 
-#endif /* _CORE_H_ */
+/// @brief Returns the QGCApplication object singleton.
+QGCApplication* qgcApp(void);
+
+#endif