private static void OnTombstonerChanged(FrameworkElement obj, Tombstoner oldValue, Tombstoner newValue)
{
if (DesignerProperties.IsInDesignTool)
{
return;
}
if (oldValue != null)
{
oldValue.Parent = null;
}
if (newValue != null)
{
newValue.Parent = obj;
ElementsToTombstone.Add(new WeakReference(obj));
CleanupElementsToTombstone();
}
if (newValue != null)
{
obj.Dispatcher.BeginInvoke(() =>
{
try
{
newValue.CalculateTombstoneId();
}
catch
{
obj.Loaded += (o, a) => newValue.CalculateTombstoneId();
}
});
}
}
private static void Initialize()
{
if (DesignerProperties.IsInDesignTool)
{
return;
}
if (PhoneApplicationService.Current == null)
{
Deployment.Current.Dispatcher.BeginInvoke(Initialize);
}
else
{
PhoneApplicationService.Current.Deactivated += (o, a) =>
{
foreach (var item in ElementsToTombstone)
{
if (item.IsAlive)
{
Tombstoner ts = GetTombstoner((FrameworkElement)item.Target);
if (ts != null)
{
ts.Tombstone();
}
}
}
};
}
}
/// <summary>
/// Sets the tombstoner for the control.
/// </summary>
/// <param name="obj">The control being tombstoned.</param>
/// <param name="value">The tombstoner for the control.</param>
public static void SetTombstoner(FrameworkElement obj, Tombstoner value)
{
obj.SetValue(TombstonerProperty, value);
}