/// <summary>
/// Binds a property on an <see cref="IPerspexObject"/> to an <see cref="IBinding"/>.
/// </summary>
/// <param name="o">The object.</param>
/// <param name="property">The property to bind.</param>
/// <param name="binding">The binding.</param>
/// <returns>An <see cref="IDisposable"/> which can be used to cancel the binding.</returns>
public static IDisposable Bind(
this IPerspexObject o,
PerspexProperty property,
IBinding binding)
{
Contract.Requires <ArgumentNullException>(o != null);
Contract.Requires <ArgumentNullException>(property != null);
Contract.Requires <ArgumentNullException>(binding != null);
var mode = binding.Mode;
if (mode == BindingMode.Default)
{
mode = property.GetMetadata(o.GetType()).DefaultBindingMode;
}
return(o.Bind(
property,
binding.CreateSubject(o, property),
mode,
binding.Priority));
}
/// <summary>
/// Converts an unset value to the default value for a direct property.
/// </summary>
/// <param name="value">The value.</param>
/// <param name="property">The property.</param>
/// <returns>The value.</returns>
private object DirectUnsetToDefault(object value, PerspexProperty property)
{
return(value == PerspexProperty.UnsetValue ?
((IDirectPropertyMetadata)property.GetMetadata(GetType())).UnsetValue :
value);
}