public static DependencyPropertyChangedListener Create(DependencyObject sourceElement, string propertyPath)
//public static DependencyPropertyChangedListener Create(DependencyObject sourceElement, DependencyProperty property)
{
// check input
if (sourceElement == null)
{
throw new ArgumentNullException("sourceElement");
}
if (string.IsNullOrWhiteSpace(propertyPath))
{
throw new ArgumentException("propertyPath is empty");
}
// create listener
DependencyPropertyChangedListener listener = new DependencyPropertyChangedListener();
// setup binding
Binding binding = new Binding();
binding.Source = sourceElement;
binding.Mode = BindingMode.OneWay;
//binding.Path = new PropertyPath(property); // throws exception
binding.Path = new PropertyPath(propertyPath);
// create relay object
RelayObject relay = new RelayObject(listener);
// ...the listener holds a reference to the relay object in order that the GC does not collect it
listener.RelayInstance = relay;
// set binding
BindingOperations.SetBinding(relay, RelayObject.ValueProperty, binding);
return(listener);
}
internal RelayObject(DependencyPropertyChangedListener listener)
{
_listener = listener;
}