void IObserver <object> .OnNext(object value)
{
void Signal()
{
var notification = value as BindingNotification;
if (notification != null)
{
if (notification.HasValue || notification.ErrorType == BindingErrorType.Error)
{
Value = notification.Value;
_owner.Changed(this);
}
if (notification.ErrorType != BindingErrorType.None)
{
_owner.Error(this, notification);
}
}
else
{
Value = value;
_owner.Changed(this);
}
}
if (Dispatcher.UIThread.CheckAccess())
{
Signal();
}
else
{
Dispatcher.UIThread.Post(Signal);
}
}
private void ValueChanged(object value)
{
_owner.Owner.Owner?.VerifyAccess();
var notification = value as BindingNotification;
if (notification != null)
{
if (notification.HasValue)
{
Value = notification.Value;
_owner.Changed(this);
}
if (notification.ErrorType != BindingErrorType.None)
{
_owner.Error(this, notification);
}
}
else
{
Value = value;
_owner.Changed(this);
}
}
private void ValueChanged(object value)
{
var bindingError = value as BindingError;
if (bindingError != null)
{
_owner.Error(this, bindingError);
}
var validationStatus = value as IValidationStatus;
if (validationStatus != null)
{
_owner.Validation(this, validationStatus);
}
else if (bindingError == null || bindingError.UseFallbackValue)
{
Value = bindingError == null ? value : bindingError.FallbackValue;
_owner.Changed(this);
}
}