private async void UpdateShuttles(ThreadPoolTimer timer)
{
List <Tuple <string, Point> > shuttleLocs = await MainDataStore.GetShuttles(commonRouteIDsColors.Keys.ToList <string>());
var oldShuttles = shuttleMap.Children.ToList <UIElement>();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.High, () => {
foreach (var oldShuttle in oldShuttles)
{
if (oldShuttle.GetType() == typeof(ShuttlePin))
{
shuttleMap.Children.Remove(oldShuttle);
}
}
AddShuttles(shuttleLocs);
});
// clean up
oldShuttles = null;
shuttleLocs = null;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected async override void LoadState(Object navigationParameter, Dictionary <String, Object> pageState)
{
Tuple <string, string> items = (Tuple <string, string>)navigationParameter;
currOrigin = items.Item1;
currDest = items.Item2;
UpdateFavoritesCache(currOrigin, currDest);
// Register the background task
if (GroupedItemsPage.asyncStatus != BackgroundAccessStatus.Denied &&
GroupedItemsPage.asyncStatus != BackgroundAccessStatus.Unspecified)
{
RegisterBackgroundTask();
}
this.pageTitle.Text = "Trip Results";
UpdateOriginDest(currOrigin, currDest);
// grab the route map (route id -> (name, color, segment list)
commonRouteIDsColors = new Dictionary <string, string>();
Dictionary <string, Tuple <string, string, List <LocationCollection> > > routeMap;
routeMap = await PopulateUI();
uiUpdaterTimer = ThreadPoolTimer.CreatePeriodicTimer(UpdateUI, TimeSpan.FromSeconds(30));
if (routeMap == null)
{
return;
}
// cache route IDs and their colors
commonRouteIDsColors = new Dictionary <string, string>();
foreach (var key in routeMap.Keys)
{
commonRouteIDsColors[key] = routeMap[key].Item2;
}
MakePolylines(routeMap);
// update color codes on UI
foreach (var key in commonRouteIDsColors.Keys)
{
string name = routeMap[key].Item1;
this.ColorCodePanel.Children.Add(new ColorCodeBox(commonRouteIDsColors[key], name));
}
// plot shuttles
List <Tuple <string, Point> > shuttleLocs = await MainDataStore.GetShuttles(commonRouteIDsColors.Keys.ToList <string>());
if (shuttleLocs != null) // there is internet
{
AddShuttles(shuttleLocs);
}
PeriodicTimer = ThreadPoolTimer.CreatePeriodicTimer(UpdateShuttles, TimeSpan.FromMilliseconds(2500));
FadeInMap();
// clean up
shuttleLocs = null;
routeMap = null;
}