public static void ValidateAccessors <TProperty>(GetterFunc <TProperty> getter, SetterFunc <TProperty> setter)
{
if (getter == null)
{
throw new Exception("Attached Properties must have a getter!");
}
if (setter == null)
{
throw new Exception("Attached Properties must have a setter!");
}
string getterName = getter.GetMethodInfo().Name;
string setterName = setter.GetMethodInfo().Name;
if (!getterName.StartsWith("Get"))
{
throw new Exception("Getter Error: Attached properties require a getter formatted Get{name}.");
}
if (!setterName.StartsWith("Set"))
{
throw new Exception("Setter Error: Attached properties require a setter formatted Set{name}.");
}
if (getterName.Substring(3) != setterName.Substring(3))
{
throw new Exception("Attached properties require a getter and setter formatted Get{name}/Set{name} where the names match.");
}
}
/// <summary>
/// Registers an attached property with the dependency property system.
/// </summary>
/// <typeparam name="TProperty">The type of the attached property (inferred)</typeparam>
/// <param name="ownerType">The attached property owner -- can't be inferred :'(</param>
/// <param name="getter">The attached property's getter (verified for required verbiage and type).</param>
/// <param name="setter">The attached property's setter (verified for required verbiage and type).</param>
/// <param name="metadata">The property metadata to register for this attached property with the dependency property system.</param>
/// <returns>The <see cref="DependencyProperty"/> that was registered for this attached property.</returns>
/// <exception cref="System.Exception">
/// APUtils::Register - Getter Error - Attached properties require a getter formatted Get{name}.
/// or
/// APUtils::Register - Setter Error - Attached properties require a getter formatted Set{name}.
/// or
/// APUtils::Register - Attached properties require a getter and setter formatted Get{name}/Set{name} where the names match.
/// </exception>
public static DependencyProperty Register <TProperty>(Type ownerType, GetterFunc <TProperty> getter, SetterFunc <TProperty> setter, PropertyMetadata metadata)
{
ValidateAccessors(getter, setter);
// Could use getter or setter, it's the same either way
string name = getter.GetMethodInfo().Name.Substring(3);
return(DependencyProperty.RegisterAttached(name, typeof(TProperty), ownerType, metadata));
}
