// synchronize changes in the view model collection with the map push pins
void Results_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
// the synchronization requires a reference to a Bing.Maps object on the Main page
if (Map == null)
{
throw new System.NullReferenceException("An instance of Bing.Maps is required here, yet the Map property was found to be null.");
}
// only additions and wholesale reset of the ObservableCollection are currently supported
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems)
{
IMappable mapItem = (IMappable)item;
PointOfInterestPin poiPin = new PointOfInterestPin(mapItem);
poiPin.Selected += (s, e2) =>
{
MappableListView.SelectedItem = MappableListView.Items.Where((c) => (c as IMappable).Id == e2.PointOfInterest.Id).FirstOrDefault();
};
Map.AddPointOfInterestPin(poiPin, mapItem.Position);
}
break;
case NotifyCollectionChangedAction.Reset:
Map.ClearPointOfInterestPins();
break;
// case NotifyCollectionChangedAction.Remove:
//
// TODO: (optional) if your application allows items to be selectively removed from the view model
// code to remove a single associated push pin will be required.
//
//
//
// break;
// not implemented in this context
// case NotifyCollectionChangedAction.Replace:
// case NotifyCollectionChangedAction.Move:
}
}
/// <summary>
/// Synchronizes changes to the ApiViewModel's Results collection. The elements of that collection are assumed
/// to implement IMappable (see the APIMASH_TomTom.TomTomCameraViewModel implementation for a sample reference).
/// This code should require no changed regardless as long as the items in the Results collection implement IMappable.
/// </summary>
void Results_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
// only additions and wholesale reset of the ObservableCollection are currently supported
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems)
{
IMappable mapItem = (IMappable)item;
PointOfInterestPin poiPin = new PointOfInterestPin(mapItem);
poiPin.Tap += async(s, e2) =>
{
TheMap.HighlightPointOfInterestPin(DefaultViewModel.SelectedItem, false);
TheMap.HighlightPointOfInterestPin(poiPin.PointOfInterest, true);
await ProcessSelectedItem(item);
};
TheMap.AddPointOfInterestPin(poiPin, mapItem.Position);
}
break;
case NotifyCollectionChangedAction.Reset:
TheMap.ClearPointOfInterestPins();
break;
// case NotifyCollectionChangedAction.Remove:
//
// TODO: (optional) if your application allows items to be selectively removed from the view model
// code to remove a single associated push pin will be required.
//
//
//
// break;
// not implemented in this context
// case NotifyCollectionChangedAction.Replace:
// case NotifyCollectionChangedAction.Move:
}
}