/// <summary>
/// Associate another owner type with this property
/// </summary>
/// <remarks>
/// The owner type is used when resolving a property by name (<see cref="FromName"/>)
/// </remarks>
/// <param name="ownerType">Additional owner type</param>
/// <param name="typeMetadata">Optional type metadata to override on owner's behalf</param>
/// <returns>This property</returns>
public DependencyProperty AddOwner(Type ownerType, PropertyMetadata typeMetadata)
{
if (ownerType == null)
{
throw new ArgumentNullException("ownerType");
}
// Map owner type to this property
// Build key
FromNameKey key = new FromNameKey(Name, ownerType);
lock (Synchronized)
{
if (PropertyFromName.Contains(key))
{
throw new ArgumentException(SR.Format(SR.PropertyAlreadyRegistered, Name, ownerType.Name));
}
}
if (typeMetadata != null)
{
OverrideMetadata(ownerType, typeMetadata);
}
lock (Synchronized)
{
PropertyFromName[key] = this;
}
return(this);
}
private static DependencyProperty RegisterCommon(string name, Type propertyType, Type ownerType, PropertyMetadata defaultMetadata, ValidateValueCallback validateValueCallback)
{
FromNameKey key = new FromNameKey(name, ownerType);
lock (Synchronized)
{
if (PropertyFromName.Contains(key))
{
throw new ArgumentException(SR.Format(SR.PropertyAlreadyRegistered, name, ownerType.Name));
}
}
// Establish default metadata for all types, if none is provided
if (defaultMetadata == null)
{
defaultMetadata = AutoGeneratePropertyMetadata(propertyType, validateValueCallback, name, ownerType);
}
else // Metadata object is provided.
{
// If the defaultValue wasn't specified auto generate one
if (!defaultMetadata.DefaultValueWasSet())
{
defaultMetadata.DefaultValue = AutoGenerateDefaultValue(propertyType);
}
ValidateMetadataDefaultValue(defaultMetadata, propertyType, name, validateValueCallback);
}
// Create property
DependencyProperty dp = new DependencyProperty(name, propertyType, ownerType, defaultMetadata, validateValueCallback);
// Seal (null means being used for default metadata, calls OnApply)
defaultMetadata.Seal(dp, null);
if (defaultMetadata.IsInherited)
{
dp._packedData |= Flags.IsPotentiallyInherited;
}
if (defaultMetadata.UsingDefaultValueFactory)
{
dp._packedData |= Flags.IsPotentiallyUsingDefaultValueFactory;
}
// Map owner type to this property
// Build key
lock (Synchronized)
{
PropertyFromName[key] = dp;
}
if (TraceDependencyProperty.IsEnabled)
{
TraceDependencyProperty.TraceActivityItem(
TraceDependencyProperty.Register,
dp,
dp.OwnerType);
}
return(dp);
}