/// <summary>
/// Registers an attached <see cref="AvaloniaProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="THost">The type of the class that the property is to be registered on.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="defaultValue">The default value of the property.</param>
/// <param name="inherits">Whether the property inherits its value.</param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <param name="validate">A validation function.</param>
/// <returns>A <see cref="AvaloniaProperty{TValue}"/></returns>
public static AttachedProperty <TValue> RegisterAttached <TOwner, THost, TValue>(
string name,
TValue defaultValue = default(TValue),
bool inherits = false,
BindingMode defaultBindingMode = BindingMode.OneWay,
Func <THost, TValue, TValue> validate = null)
where THost : IAvaloniaObject
{
Contract.Requires <ArgumentNullException>(name != null);
var metadata = new StyledPropertyMetadata <TValue>(
defaultValue,
validate: Cast(validate),
defaultBindingMode: defaultBindingMode);
var result = new AttachedProperty <TValue>(name, typeof(TOwner), metadata, inherits);
AvaloniaPropertyRegistry.Instance.Register(typeof(THost), result);
return(result);
}
/// <summary>
/// Registers an attached <see cref="AvaloniaProperty"/>.
/// </summary>
/// <typeparam name="THost">The type of the class that the property is to be registered on.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="ownerType">The type of the class that is registering the property.</param>
/// <param name="defaultValue">The default value of the property.</param>
/// <param name="inherits">Whether the property inherits its value.</param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <param name="validate">A value validation callback.</param>
/// <param name="coerce">A value coercion callback.</param>
/// <returns>A <see cref="AvaloniaProperty{TValue}"/></returns>
public static AttachedProperty <TValue> RegisterAttached <THost, TValue>(
string name,
Type ownerType,
TValue defaultValue = default(TValue),
bool inherits = false,
BindingMode defaultBindingMode = BindingMode.OneWay,
Func <TValue, bool> validate = null,
Func <IAvaloniaObject, TValue, TValue> coerce = null)
where THost : IAvaloniaObject
{
Contract.Requires <ArgumentNullException>(name != null);
var metadata = new StyledPropertyMetadata <TValue>(
defaultValue,
defaultBindingMode: defaultBindingMode,
coerce: coerce);
var result = new AttachedProperty <TValue>(name, ownerType, metadata, inherits, validate);
var registry = AvaloniaPropertyRegistry.Instance;
registry.Register(ownerType, result);
registry.RegisterAttached(typeof(THost), result);
return(result);
}