/// <summary>
/// Refreshes the list of items obtained from the API and populates the view model
/// </summary>
public async Task Refresh()
{
// get bounding box of current map
var topLeft = TheMap.ConvertViewportPointToGeoCoordinate(new Point(0, 0));
var bottomRight = TheMap.ConvertViewportPointToGeoCoordinate(new Point(TheMap.ActualWidth, TheMap.ActualHeight));
var box = new BoundingBox(topLeft.Latitude, bottomRight.Latitude, topLeft.Longitude, bottomRight.Longitude);
//
// TODO: invoke API that returns a list of point-of-interest items now in view on the map. This will populate
// an observable collection of IMappable items on the ApiViewModel class (with the name Results). As that
// collection is populated, the Results_CollectionChanged callback will fire to create the appropriate
// point-of-interest pins and associate them with the map.
//
this.DefaultViewModel.ApiStatus = await _tomTomApi.GetCameras(box, (Int32)App.Current.Resources["MaxResults"]);
// if there's a problem in the request, show a message box
if (!DefaultViewModel.ApiStatus.IsSuccessStatusCode)
{
MessageBox.Show(
String.Format("There was an error in handling the last request.\n\nCode: {0}\n\nMessage: {1}",
(Int32)DefaultViewModel.ApiStatus.StatusCode,
String.IsNullOrEmpty(DefaultViewModel.ApiStatus.Message) ? DefaultViewModel.ApiStatus.StatusCode.ToString() : DefaultViewModel.ApiStatus.Message),
"Request Error",
MessageBoxButton.OK);
}
}
