public Coordinates GetPosition(int maxAge)
{
Coordinates retCoords = new Coordinates();
if (_gpsDeviceState != null &&
_gpsDeviceState.DeviceState == GpsServiceState.On &&
_gpsDeviceState.ServiceState == GpsServiceState.On)
{
//TimeSpan maxage = new TimeSpan(0, 0, 1);
GpsPosition position = _gps.GetPosition(maxAge);
if (position.LatitudeValid && position.LongitudeValid)
{
retCoords.Latitude = position.Latitude;
retCoords.Longitude = position.Longitude;
}
}
return(retCoords);
}
/// <summary>
/// Get the position reported by the GPS receiver that is no older than
/// the maxAge passed in
/// </summary>
/// <param name="maxAge">Max age (int milisecs) of the gps position data that you want back.
/// If there is no data within the required age, null is returned.
/// <returns>GpsPosition class with all the position details</returns>
public GpsPosition GetPosition(int maxAge)
{
GpsPosition gpsPosition = null;
if (Opened)
{
// allocate the necessary memory on the native side. We have a class (GpsPosition) that
// has the same memory layout as its native counterpart
IntPtr ptr = Utils.LocalAlloc(Marshal.SizeOf(typeof(GpsPosition)));
// fill in the required fields
gpsPosition = new GpsPosition();
gpsPosition.dwVersion = 1;
gpsPosition.dwSize = Marshal.SizeOf(typeof(GpsPosition));
// Marshal our data to the native pointer we allocated.
Marshal.StructureToPtr(gpsPosition, ptr, false);
// call native method passing in our native buffer
//int result = GPSGetPosition(gpsHandle, ptr, 500000, 0);
int result = GPSGetPosition(gpsHandle, ptr, maxAge, 0);
if (result == 0)
{
// native call succeeded, marshal native data to our managed data
gpsPosition = (GpsPosition)Marshal.PtrToStructure(ptr, typeof(GpsPosition));
//if (maxAge != TimeSpan.Zero)
//{
// // check to see if the data is recent enough.
// if (!gpsPosition.TimeValid || DateTime.Now - maxAge > gpsPosition.Time)
// {
// gpsPosition = null;
// }
//}
}
// free our native memory
Utils.LocalFree(ptr);
}
return(gpsPosition);
}
public LocationChangedEventArgs(GpsPosition position)
{
this.position = position;
}
public LocationChangedEventArgs(GpsPosition position)
{
this.position = position;
}
/// <summary>
/// Get the position reported by the GPS receiver that is no older than
/// the maxAge passed in
/// </summary>
/// <param name="maxAge">Max age (int milisecs) of the gps position data that you want back.
/// If there is no data within the required age, null is returned.
/// <returns>GpsPosition class with all the position details</returns>
public GpsPosition GetPosition(int maxAge)
{
GpsPosition gpsPosition = null;
if (Opened)
{
// allocate the necessary memory on the native side. We have a class (GpsPosition) that
// has the same memory layout as its native counterpart
IntPtr ptr = Utils.LocalAlloc(Marshal.SizeOf(typeof(GpsPosition)));
// fill in the required fields
gpsPosition = new GpsPosition();
gpsPosition.dwVersion = 1;
gpsPosition.dwSize = Marshal.SizeOf(typeof(GpsPosition));
// Marshal our data to the native pointer we allocated.
Marshal.StructureToPtr(gpsPosition, ptr, false);
// call native method passing in our native buffer
//int result = GPSGetPosition(gpsHandle, ptr, 500000, 0);
int result = GPSGetPosition(gpsHandle, ptr, maxAge, 0);
if (result == 0)
{
// native call succeeded, marshal native data to our managed data
gpsPosition = (GpsPosition)Marshal.PtrToStructure(ptr, typeof(GpsPosition));
//if (maxAge != TimeSpan.Zero)
//{
// // check to see if the data is recent enough.
// if (!gpsPosition.TimeValid || DateTime.Now - maxAge > gpsPosition.Time)
// {
// gpsPosition = null;
// }
//}
}
// free our native memory
Utils.LocalFree(ptr);
}
return gpsPosition;
}
