public TriggerOnEntryNotifier(PropertyChangedEventHandler handler, INotifierPropertyEntry entry, TriggerPath path)
: base(path, handler)
{
entry.PropertyChanged += Handler;
_onDispose = () => entry.PropertyChanged -= Handler;
if (Path == null)
{
return;
}
void NextHandler(object sender, PropertyChangedEventArgs arg)
{
_next?.Dispose();
if (arg is NotifierPropertyChangedEventArgs notifierArg)
{
_next = notifierArg.NewValue != null?Subscribe(notifierArg.NewValue) : null;
}
}
entry.RegisterValue += NextHandler;
_onDispose += () => entry.RegisterValue -= NextHandler;
_onDispose += () => _next?.Dispose();
if (!entry.IsSet)
{
entry.Update();
}
var value = entry.GetValue();
NextHandler(null, new NotifierPropertyChangedEventArgs(entry, null, value));
}
public NotifierPropertyChangedEventArgs(INotifierPropertyEntry entry, object oldValue, object newValue) : base(entry.Property.Name)
{
Entry = entry;
OldValue = oldValue;
NewValue = newValue;
}