private void updateNewLocation(WifiSnifferPositioningService.PositionEstimate location)
{
double distToPrev = -1; //placed here so I can see its value throughoutu the mehthod (for debugging)
if (location != null)
{
bool showNewLocation = true;
if (lastUpdatedLocation != null)
{
//ekstra tjek - paa threshold
double oldLat = lastUpdatedLocation.Latitude;
double oldLng = lastUpdatedLocation.Longitude;
double newLat = location.Latitude;
double newLng = location.Longitude;
distToPrev = DistanceMeasurements.CalculateMoveddistanceInMeters(oldLat, oldLng, newLat, newLng);
if (distToPrev <= this.updateThresholdInMeters)
{
showNewLocation = false;
}
}
if (showNewLocation)
{
UI_UpdateNewLocation(location);
lastUpdatedLocation = location; //NOTE: MAYBE important to COPY as done here.
}
lastKnownLocation = location;
}
}
private static void OnGetPositionComplete(IAsyncResult result)
{
// Get the radiomapContext back from the stored state.
snifferContext = result.AsyncState as SnifferModel;
try
{
WifiSnifferPositioningService.PositionEstimate newPos = snifferContext.EndExecute <WifiSnifferPositioningService.PositionEstimate>(result).FirstOrDefault();
PreviousPositionEstimate = CurrentPositionEstimate;
CurrentPositionEstimate = newPos;
if (CurrentPositionEstimate != null)
{
//We notify about a new building in any of these two scenarios:
//1) This is the first estimate after starting positioning.
//2) The building id of the current estimate differs from the previous
bool arrivedAtNewBuilding = PreviousPositionEstimate != null && CurrentPositionEstimate != null && CurrentPositionEstimate.Building_ID != PreviousPositionEstimate.Building_ID;
if (!_hasReceivedWifiPosition || arrivedAtNewBuilding)
{
_hasReceivedWifiPosition = true;
OnBuildingIdentificationStatusChanged(null, new BuildingIdentificationEventArgs(true, CurrentPositionEstimate.Building_ID));
}
OnPositionEstimateChanged(null, new PositionEstimateEventArgs(CurrentPositionEstimate));
if (AllowTracking)
{
AddToTrackedPositions(newPos);
}
}
}
catch (DataServiceQueryException) { }
}
private void UI_UpdateNewLocation(WifiSnifferPositioningService.PositionEstimate location)
{
if (uiMode == UiMode.GOOGLE_MAPS)
{
JSInterface.updateNewLocation(browser, location);
}
else if (uiMode == UiMode.BING_MAPS)
{
OnPositionEstimateChanged(this, new PositionEstimateArgs(location));
}
}
private void LocationService_OnPositionEstimateChange(object sender, LocationService.PositionEstimateEventArgs e)
{
WifiSnifferPositioningService.PositionEstimate location = e.PositionEstimate;
//TODO: Insert a check for whether we need to shift building
//location.Building_ID != lastKnownWifiLocation
//The rest is part of an else block
mCurrentEstimatedFloor = (int)location.Altitude; //placed here because we check floor before updating location
//First check if we are even interested in receiving position updates?
if (!IsTrackingPosition)
{
return;
}
//Then check whether we need to update floor
//We change floor if this is the very first wifi location or the location is estimated
//at a new floor
bool doChangeFloor = false;
//Beware: If the locationService changes semantics to broadcasting null estimates (in case of error)
//then this null check will not be a valid indicator of a floor change
if (lastKnownWifiLocation == null) //No prior pos: We change floor
{
doChangeFloor = true;
}
else //Check for new floor
{
int prevFloor = (int)lastKnownWifiLocation.Altitude;
if (prevFloor != mCurrentEstimatedFloor)
{
doChangeFloor = true;
}
}
lastKnownWifiLocation = location;
if (doChangeFloor)
{
mCurrentSelectedFloor = mCurrentEstimatedFloor;
//Globals.ShowDialog(source, "Changing to new floor...", Globals.DURATION_SHORT);
refreshUI();
}
//the threshold based check for whether to update the location is conducted in updateNewLocation()
//as it applies to gps and wi-fi alike
updateNewLocation(location);
}
/// <summary>
/// Both the sniffer backend and radiomap backend define a PositionEstimate entity.
/// Therefore, we convert WifiSniffer position estimates to radiomap position-estimates when
/// we save tracking data to the radio map backend (which houses the tracking data as well)
/// </summary>
/// <param name="?"></param>
/// <returns></returns>
private static TrackedPosition CreateTrackedPosition(WifiSnifferPositioningService.PositionEstimate org)
{
TrackedPosition res = new TrackedPosition();
res.Accuracy = org.Accuracy;
res.Altitude = org.Altitude;
res.Bearing = org.Bearing;
res.Building_ID = org.Building_ID;
res.HasAccuracy = org.HasAccuracy;
res.HasBearing = org.HasBearing;
res.HasSpeed = org.HasSpeed;
res.Latitude = org.Latitude;
res.Longitude = org.Longitude;
res.Provider = org.Provider;
res.Speed = org.Speed;
res.Time = DateTime.Now; //org.Time;
res.VertexID = org.VertexID;
res.ClientID = ClientId; //A guid
return(res);
}
public PositionEstimateEventArgs(WifiSnifferPositioningService.PositionEstimate pos)
{
this.PositionEstimate = pos;
}
/// <summary>
/// Creates a tracked position from a wifi sniffer position estimate and adds it to the tracked positions
/// </summary>
/// <param name="pos"></param>
private static void AddToTrackedPositions(WifiSnifferPositioningService.PositionEstimate pos)
{
AddToTrackedPositions(CreateTrackedPosition(pos));
}
public PositionEstimateEventArgs(WifiSnifferPositioningService.PositionEstimate pos)
{
this.PositionEstimate = pos;
}
public PositionEstimateArgs(WifiSnifferPositioningService.PositionEstimate loc)
{
this.Location = loc;
}
public PositionEstimateArgs(WifiSnifferPositioningService.PositionEstimate loc)
{
this.Location = loc;
}
private void updateNewLocation(WifiSnifferPositioningService.PositionEstimate location)
{
double distToPrev = -1; //placed here so I can see its value throughoutu the mehthod (for debugging)
if (location != null)
{
bool showNewLocation = true;
if (lastUpdatedLocation != null)
{
//ekstra tjek - paa threshold
double oldLat = lastUpdatedLocation.Latitude;
double oldLng = lastUpdatedLocation.Longitude;
double newLat = location.Latitude;
double newLng = location.Longitude;
distToPrev = DistanceMeasurements.CalculateMoveddistanceInMeters(oldLat, oldLng, newLat, newLng);
if (distToPrev <= this.updateThresholdInMeters)
{
showNewLocation = false;
}
}
if (showNewLocation)
{
UI_UpdateNewLocation(location);
lastUpdatedLocation = location; //NOTE: MAYBE important to COPY as done here.
}
lastKnownLocation = location;
}
}
private void LocationService_OnPositionEstimateChange(object sender, LocationService.PositionEstimateEventArgs e)
{
WifiSnifferPositioningService.PositionEstimate location = e.PositionEstimate;
//TODO: Insert a check for whether we need to shift building
//location.Building_ID != lastKnownWifiLocation
//The rest is part of an else block
mCurrentEstimatedFloor = (int)location.Altitude; //placed here because we check floor before updating location
//First check if we are even interested in receiving position updates?
if (!IsTrackingPosition)
return;
//Then check whether we need to update floor
//We change floor if this is the very first wifi location or the location is estimated
//at a new floor
bool doChangeFloor = false;
//Beware: If the locationService changes semantics to broadcasting null estimates (in case of error)
//then this null check will not be a valid indicator of a floor change
if (lastKnownWifiLocation == null) //No prior pos: We change floor
{
doChangeFloor = true;
}
else //Check for new floor
{
int prevFloor = (int)lastKnownWifiLocation.Altitude;
if (prevFloor != mCurrentEstimatedFloor)
doChangeFloor = true;
}
lastKnownWifiLocation = location;
if (doChangeFloor)
{
mCurrentSelectedFloor = mCurrentEstimatedFloor;
//Globals.ShowDialog(source, "Changing to new floor...", Globals.DURATION_SHORT);
refreshUI();
}
//the threshold based check for whether to update the location is conducted in updateNewLocation()
//as it applies to gps and wi-fi alike
updateNewLocation(location);
}
