/// STEP 2B: On geofence notification, read reports
/// Event handler for geofence state changes.
/// </summary>
/// <param name="sender">GeofenceMonitor, which receives the event notifications.</param>
/// <param name="e">Event data that describes how this page was reached. The Parameter
/// property is typically used to configure the page.</param>
public async void OnGeofenceStateChangedHandler(GeofenceMonitor sender, object e)
{
// Get reports for geofences state changes
var reports = sender.ReadReports();
foreach (GeofenceStateChangeReport report in reports)
{
GeofenceState state = report.NewState;
Windows.Devices.Geolocation.Geofencing.Geofence geofence = report.Geofence;
var gasStationItem = await SampleDataSource.GetItemAsync(geofence.Id);
// If we've entered a particular geofence, show message for that geofence's id
if (state == GeofenceState.Entered)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// Show message for the given geofence enter event
string geofenceEnterMessage = "Approaching " + gasStationItem.Subtitle;
// Post message update
Debug.WriteLine(geofenceEnterMessage);
// Update Fence
updateGasStationFence(report.Geofence.Id, (Geocircle)report.Geofence.Geoshape, Colors.Green);
// Or create a toast to tell the user about the event
SendToast(geofenceEnterMessage);
// Or do stuff under the covers, such as update info, change something in the phone, send message, etc
});
}
// If we've exited a particular geofence, show message for that geofence's id
else if (state == GeofenceState.Exited)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
// Show message for the given geofence exit event
string geofenceExitMessage = "Departing " + gasStationItem.Subtitle;
// Post message update
Debug.WriteLine(geofenceExitMessage);
// Draw Fence
updateGasStationFence(report.Geofence.Id, (Geocircle)report.Geofence.Geoshape, Colors.Red);
// Or create a toast to tell the user about the event
//SendToast(geofenceExitMessage);
// Or do stuff under the covers, such as check out, change something in the phone, send message, etc
});
}
else if (state == GeofenceState.Removed)
{
GeofenceRemovalReason reason = report.RemovalReason;
string eventDescription = "Geofence Removed: ";
if (reason == GeofenceRemovalReason.Expired)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
eventDescription += " (Removed/Expired)";
Debug.WriteLine(eventDescription + geofence.Id);
});
}
else if (reason == GeofenceRemovalReason.Used)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
eventDescription += " (Removed/Used)";
Debug.WriteLine(eventDescription + geofence.Id);
});
}
}
}
}
/*
/ Voor het toevoegen van icon's aan de map.
*/
private void AddMapIcon(LocationData location)
{
MapIcon MapIcon1 = new MapIcon();
MapIcon1.Location = new Geopoint(location.position);
MapIcon1.NormalizedAnchorPoint = new Point(0.5, 1.0);
MapIcon1.Title = location.name;
InputMap.MapElements.Add(MapIcon1);
// Geofence
BasicGeoposition pos = new BasicGeoposition();
pos.Latitude = location.position.Latitude;
pos.Longitude = location.position.Longitude;
Geocircle circle = new Geocircle(pos, 35);
MonitoredGeofenceStates monitoredStates =
MonitoredGeofenceStates.Entered |
MonitoredGeofenceStates.Exited |
MonitoredGeofenceStates.Removed;
TimeSpan dwellTime = TimeSpan.FromSeconds(1);
var geofence = new Windows.Devices.Geolocation.Geofencing.Geofence(location.name, circle, monitoredStates, false, dwellTime);
GeofenceMonitor.Current.Geofences.Add(geofence);
drawGeofence(location, 35);
}
