/// <summary>
/// Freeze a hub tile.
/// </summary>
/// <param name="tile">The hub tile to be frozen.</param>
public static void FreezeHubTile(HubTile tile)
{
WeakReference wref = new WeakReference(tile, TrackResurrection);
AddReferenceToFrozenPool(wref);
RemoveReferenceFromEnabledPool(wref);
RemoveReferenceFromStalledPipeline(wref);
}
/// <summary>
/// Remove all references of a hub tile before finalizing it.
/// </summary>
/// <param name="tile">The hub tile that is to be finalized.</param>
internal static void FinalizeReference(HubTile tile)
{
WeakReference wref = new WeakReference(tile, TrackResurrection);
HubTileService.RemoveReferenceFromEnabledPool(wref);
HubTileService.RemoveReferenceFromFrozenPool(wref);
HubTileService.RemoveReferenceFromStalledPipeline(wref);
}
/// <summary>
/// Removes the frozen image from the enabled image pool or the stalled image pipeline.
/// Adds the non-frozen image to the enabled image pool.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="e">The event information.</param>
private static void OnIsFrozenChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
HubTile tile = (HubTile)obj;
if ((bool)e.NewValue)
{
HubTileService.FreezeHubTile(tile);
}
else
{
HubTileService.UnfreezeHubTile(tile);
}
}
/// <summary>
/// Prevents the hub tile from transitioning into a Semiexpanded or Collapsed visual state if the title is not set.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="e">The event information.</param>
private static void OnTitleChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
HubTile tile = (HubTile)obj;
if (string.IsNullOrEmpty((string)e.NewValue))
{
tile._canDrop = false;
tile.State = ImageState.Expanded;
}
else
{
tile._canDrop = true;
}
}
/// <summary>
/// Add a reference to a newly instantiated hub tile.
/// </summary>
/// <param name="tile">The newly instantiated hub tile.</param>
internal static void InitializeReference(HubTile tile)
{
WeakReference wref = new WeakReference(tile, TrackResurrection);
if (tile.IsFrozen)
{
AddReferenceToFrozenPool(wref);
}
else
{
AddReferenceToEnabledPool(wref);
}
RestartTimer();
}
/// <summary>
/// Prevents the hub tile from transitioning into a Flipped visual state if neither the notification alert nor the message are set.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="e">The event information.</param>
private static void OnBackContentChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
HubTile tile = (HubTile)obj;
// If there is a new notification or a message, the hub tile can flip.
if ((!(string.IsNullOrEmpty(tile.Notification)) && tile.DisplayNotification) ||
(!(string.IsNullOrEmpty(tile.Message)) && !tile.DisplayNotification))
{
tile._canFlip = true;
}
else
{
tile._canFlip = false;
tile.State = ImageState.Expanded;
}
}