/// <summary>
/// Attaches the source.
/// </summary>
/// <param name="source">
/// The source.
/// </param>
protected override void AttachSource(object source)
{
base.AttachSource(source);
if (source != null && source.GetType().ContainsEvent(WeakCollectionBinding.CollectionChangedEventName))
{
if (collectionWeakEvent != null)
{
collectionWeakEvent.DetachEvent();
}
if (collectionWeakEvent == null)
{
collectionWeakEvent = new WeakEvent(this);
}
collectionWeakEvent.AttachEvent(source, null, WeakCollectionBinding.CollectionChangedEventName, "OnSourceCollectionChanged");
}
}
/// <summary>
/// UnWatch the source property.
/// </summary>
/// <param name="source">
/// The source.
/// </param>
/// <param name="property">
/// The property.
/// </param>
/// <returns>
/// The <see cref="WeakCommandBinding"/>.
/// </returns>
/// <exception cref="System.ArgumentNullException">
/// The source can not be null.
/// </exception>
public WeakCommandBinding UnWatch(object source, string property)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
var bindSource = new BindContext(source, property);
var entry = new WeakEntry(null, bindSource.Source, property);
if (this.watchEvents.ContainsKey(entry))
{
WeakEvent watchEvent = this.watchEvents[entry];
watchEvent.DetachEvent();
this.watchEvents.Remove(entry);
}
this.RaiseCanExecuteChanged();
return(this);
}