private void InvokeEvent(object sender, PropertyChangedEventArgs eventArgs)
{
foreach (WeakReference <DependencyObject> Target in this.targets.ToArray())
{
DependencyObject TheTarget; //save target to allow deferred call below
if (Target.TryGetTarget(out TheTarget))
{
if (TheTarget is FrameworkElement)
{
TheTarget.Dispatcher.BeginInvoke(
DispatcherPriority.Normal,
(Action) delegate
{
((FrameworkElement)TheTarget).RaiseEvent(new RoutedEventArgs(PropertyChangedRoutedEventFactory.GetRoutedEvent($"{eventArgs.PropertyName}Changed")));
});
}
else if (TheTarget is FrameworkContentElement)
{
TheTarget.Dispatcher.BeginInvoke(
DispatcherPriority.Normal,
(Action) delegate
{
((FrameworkContentElement)TheTarget).RaiseEvent(new RoutedEventArgs(PropertyChangedRoutedEventFactory.GetRoutedEvent($"{eventArgs.PropertyName}Changed")));
});
}
else
{
throw new InvalidOperationException();
}
}
else
{
this.targets.Remove(Target);
}
}
}
/// <summary>
/// When implemented in a derived class, returns an object that is provided as the value of the target property for this markup extension.
/// </summary>
/// <returns>
/// The object value to set on the property where the extension is applied.
/// </returns>
/// <param name="serviceProvider">A service provider helper that can provide services for the markup extension.</param>
public override object ProvideValue(IServiceProvider serviceProvider) => PropertyChangedRoutedEventFactory.GetRoutedEvent($"{this.EventName}Changed");