/// <summary>
/// Hides/shows point-of-interest pin
/// </summary>
/// <param name="item">Item associated with the point-of-interest pin</param>
/// <param name="highlight">Flag indicating whether point-of-interest pin should be highlighted or unhighlighted</param>
public static void HighlightPointOfInterestPin(this Map m, IMappable item, Boolean highlight)
{
MapLayer poiLayer = PoiLayer(m);
if ((poiLayer != null) && (item != null))
{
// search for pin in the layer matching by id - some defensive programming here to not assume everything
// in this layer is a point-of-interest pin (but it should be!)
PointOfInterestPin poiPin = poiLayer.Children.Where((c) =>
{
var p = c as PointOfInterestPin;
return((p != null) && (p.PointOfInterest.Id == item.Id));
}).FirstOrDefault() as PointOfInterestPin;
// if pin is found
if (poiPin != null)
{
// set highlight appropriately
poiPin.IsHighlighted = highlight;
// if it's highlighted, bring to top by removing and adding back in
if (highlight)
{
poiLayer.Children.Remove(poiPin);
poiLayer.Children.Add(poiPin);
}
}
}
}
/// <summary>
/// Adds point-of-interest pin to designated location
/// </summary>
/// <param name="pin">Point-of-interest pin instance</param>
/// <param name="position">Latitude/longitude for pin placement</param>
public static void AddPointOfInterestPin(this Map m, PointOfInterestPin pin, LatLong position)
{
MapLayer poiLayer = PoiLayer(m);
if (poiLayer == null)
{
poiLayer = new MapLayer();
m.Children.Add(poiLayer);
}
MapLayer.SetPositionAnchor(pin, pin.AnchorPoint);
MapLayer.SetPosition(pin, new Location(position.Latitude, position.Longitude));
poiLayer.Children.Add(pin);
}
/// <summary>
/// Adds point-of-interest pin to designated location
/// </summary>
/// <param name="pin">Point-of-interest pin instance</param>
/// <param name="position">Latitude/longitude for pin placement</param>
public static void AddPointOfInterestPin(this Map m, PointOfInterestPin pin, LatLong position)
{
MapLayer poiLayer = PoiLayer(m);
if (poiLayer == null)
{
poiLayer = new MapLayer();
m.Children.Add(poiLayer);
}
MapLayer.SetPositionAnchor(pin, pin.AnchorPoint);
MapLayer.SetPosition(pin, new Location(position.Latitude, position.Longitude));
poiLayer.Children.Add(pin);
}
// 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 += (s2, e2) =>
{
MappableListView.SelectedItem = MappableListView.Items.Where((c) => (c as IMappable).Id == e2.PointOfInterest.Id).FirstOrDefault();
};
poiPin.Tapped += (s3, e3) => { e3.Handled = true; };
Map.AddPointOfInterestPin(poiPin, mapItem.Position);
}
break;
case NotifyCollectionChangedAction.Reset:
Map.ClearPointOfInterestPins();
break;
// not implemented in this context
// case NotifyCollectionChangesAction.Remove:
// case NotifyCollectionChangedAction.Replace:
// case NotifyCollectionChangedAction.Move:
}
}