// TODO: If we're setting an icon's state to PointerOver, maybe make sure it's the only icon in a PointerOver state?
// Hope that's not too slow.
// Maybe keep a list of all icons currently in a PointerOver state...
public void SetIconState(Guid iconId, MapIconState iconState)
{
MapIcon matchingIcon = DigiTransitMapControl.MapElements
.OfType <MapIcon>()
.FirstOrDefault(x => (Guid)x.GetValue(PoiIdProperty) == iconId);
if (matchingIcon == null)
{
return;
}
// The MapIconChanged callback in the Attached Property handles Image changing on State changes. See MapElementExtensions.cs.
matchingIcon.SetValue(MapIconStateProperty, iconState);
// Only allow one icon to be highlighted at at time by external callers.
if (iconState != MapIconState.None)
{
foreach (MapIcon activeIcon in DigiTransitMapControl.MapElements.
OfType <MapIcon>()
.Where(x => (MapIconState)x.GetValue(MapIconStateProperty) != MapIconState.None &&
(Guid)x.GetValue(PoiIdProperty) != iconId))
{
activeIcon.SetValue(MapIconStateProperty, MapIconState.None);
}
}
}
/// <summary>
/// Converts a Point object into a MapIcon
/// </summary>
/// <param name="point">A Point object</param>
/// <returns>A MapIcon object</returns>
public static MapIcon ToBMGeometry(this Point point)
{
var pushpin = new MapIcon()
{
Location = new Geopoint(point.Coordinate.ToBMGeometry())
};
pushpin.SetValue(MapElementExt.TagProperty, point.Metadata);
return(pushpin);
}
private void DigiTransitMapControl_MapElementPointerExited(MapControl sender, MapElementPointerExitedEventArgs args)
{
MapIcon icon = args.MapElement as MapIcon;
if (icon == null)
{
return;
}
if ((MapIconState)icon.GetValue(MapIconStateProperty) == MapIconState.PointerOver)
{
// The MapIconChanged callback in the Attached Property handles Image changing on State changes. See MapElementExtensions.cs.
icon.SetValue(MapIconStateProperty, MapIconState.None);
}
}
private async void OnPlacesCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
if (args.Action == NotifyCollectionChangedAction.Move)
{
return;
}
if (args.Action == NotifyCollectionChangedAction.Reset)
{
SetMapIcons(null);
}
if (args.NewItems != null)
{
var newIcons = new List <MapIcon>();
foreach (IMapPoi place in args.NewItems.OfType <IMapPoi>())
{
var element = new MapIcon();
element.Image = RandomAccessStreamReference.CreateFromStream(await _themeIconSource);
element.CollisionBehaviorDesired = MapElementCollisionBehavior.RemainVisible;
element.Location = new Geopoint(place.Coords);
element.Title = place.Name;
element.NormalizedAnchorPoint = new Point(0.5, 1.0);
element.SetValue(PoiIdProperty, place.Id);
MapElementExtensions.SetPoiId(element, place.Id);
newIcons.Add(element);
}
AddMapIcons(newIcons);
}
if (args.OldItems != null)
{
var removedIcons = new List <MapIcon>();
foreach (IMapPoi place in args.OldItems.OfType <IMapPoi>())
{
var removedIcon = DigiTransitMapControl.MapElements
.OfType <MapIcon>()
.FirstOrDefault(x => x.Location.Position.Equals(place.Coords));
removedIcons.Add(removedIcon);
}
RemoveMapIcons(removedIcons);
}
}
