PositionManager.h: add gcsHeading

src/PositionManager/PositionManager.h

@@ -26,6 +26,7 @@ public:
     ~QGCPositionManager();
 
     Q_PROPERTY(QGeoCoordinate gcsPosition  READ gcsPosition  NOTIFY gcsPositionChanged)
+    Q_PROPERTY(qreal          gcsHeading   READ gcsHeading   NOTIFY gcsHeadingChanged)
 
     enum QGCPositionSource {
         Simulated,
@@ -36,6 +37,8 @@ public:
 
     QGeoCoordinate gcsPosition(void) { return _gcsPosition; }
 
+    qreal gcsHeading() { return _gcsHeading; }
+
     void setPositionSource(QGCPositionSource source);
 
     int updateInterval() const;
@@ -50,11 +53,13 @@ private slots:
 
 signals:
     void gcsPositionChanged(QGeoCoordinate gcsPosition);
+    void gcsHeadingChanged(qreal gcsHeading);
     void positionInfoUpdated(QGeoPositionInfo update);
 
 private:
     int             _updateInterval;
     QGeoCoordinate  _gcsPosition;
+    qreal           _gcsHeading;
 
     QGeoPositionInfoSource*     _currentSource;
     QGeoPositionInfoSource*     _defaultSource;