/// <summary>
/// Registers a direct <see cref="PerspexProperty"/>.
/// </summary>
/// <typeparam name="TOwner">The type of the class that is registering the property.</typeparam>
/// <typeparam name="TValue">The type of the property's value.</typeparam>
/// <param name="name">The name of the property.</param>
/// <param name="getter">Gets the current value of the property.</param>
/// <param name="setter">Sets the value of the property.</param>
/// <param name="unsetValue">
/// The value to use when the property is set to <see cref="PerspexProperty.UnsetValue"/>
/// </param>
/// <param name="defaultBindingMode">The default binding mode for the property.</param>
/// <returns>A <see cref="PerspexProperty{TValue}"/></returns>
public static DirectProperty <TOwner, TValue> RegisterDirect <TOwner, TValue>(
string name,
Func <TOwner, TValue> getter,
Action <TOwner, TValue> setter = null,
TValue unsetValue = default(TValue),
BindingMode defaultBindingMode = BindingMode.OneWay)
where TOwner : IPerspexObject
{
Contract.Requires <ArgumentNullException>(name != null);
var metadata = new DirectPropertyMetadata <TValue>(
unsetValue: unsetValue,
defaultBindingMode: defaultBindingMode);
var result = new DirectProperty <TOwner, TValue>(name, getter, setter, metadata);
PerspexPropertyRegistry.Instance.Register(typeof(TOwner), result);
return(result);
}