///<summary>
/// Initializes an instance of the ElementReferenceProperty. This is usually created by the <see cref="SectionViewModel"/>.
///</summary>
///<param name="serviceProvider">The service provide used within the Enterprise Library configuration system.</param>
///<param name="lookup">The element lookup registry.</param>
///<param name="parent">The <see cref="ElementViewModel"/> on which this property is attached.</param>
///<param name="declaringProperty">The descriptor declaring this property.</param>
///<param name="additionalAttributes">Additional attributes to apply to the reference proeprty.</param>
///<exception cref="ArgumentException">Thrown if the declaring property <see cref="PropertyDescriptor.PropertyType"/> is not a <see cref="string"/> type.</exception>
public ElementReferenceProperty(IServiceProvider serviceProvider, ElementLookup lookup, ElementViewModel parent, PropertyDescriptor declaringProperty, IEnumerable<Attribute> additionalAttributes)
: base(serviceProvider, parent, declaringProperty, additionalAttributes.Union(new Attribute[]{new ValidationAttribute(typeof(ElementReferenceValidator))}))
{
if (declaringProperty.PropertyType != typeof(string)) throw new ArgumentException(Resources.ReferencePropertyInvalidType);
this.lookup = lookup;
this.changeScopePropertyWatcher = new ChangeScopePropertyWatcher();
this.changeScopePropertyWatcher.ChangeScopePropertyChanged += new EventHandler(ChangeScopePropertyWatcherChangeScopePropertyChanged);
referenceAttribute = base.Attributes.OfType<ReferenceAttribute>().FirstOrDefault();
Debug.Assert(referenceAttribute != null);
((INotifyCollectionChanged)ValidationResults).CollectionChanged += ValidationCollectionChanged;
}
public DeferredElementScope(ReferenceAttribute referenceAttribute,
ElementViewModel baseDeclaringElement,
ElementLookup lookup)
{
this.referenceAttribute = referenceAttribute;
this.lookup = lookup;
if (referenceAttribute.ScopeIsDeclaringElement)
{
CreateElementScope(baseDeclaringElement);
}
else
{
if (!TryCreateScopeElement())
{
scopeChangeScope =
lookup.CreateChangeScope(x => x.ConfigurationType.IsAssignableFrom(referenceAttribute.ScopeType));
scopeChangeScope.CollectionChanged += ScopeChangedHandler;
}
}
}
