public static Action <T> CreateSetDelegate <T>(this PropertyInfo info, object instance)
{
Type propertyType = info.PropertyType;
var generatedDelegate = info.GetSetMethod().CreateDelegate(typeof(Action <>).MakeGenericType(propertyType), instance);
return(data => generatedDelegate.DynamicInvoke(BindingConverter.ConvertBindingValue(propertyType, data)));
}
public static void BindProperty(this VisualTreeElement element, PropertyInfo elementProperty, BindablePropertyAttribute attribute, BindingExpression binding)
{
if (!binding.IsDatabound)
{
elementProperty.SetValue(element, BindingConverter.ConvertBindingValue(elementProperty.PropertyType, binding.Source));
return;
}
Action <Action> subscriber;
BindingMode mode;
if (string.IsNullOrEmpty(attribute.ChangeHandler))
{
subscriber = handler => { };
mode = BindingMode.FromViewModel;
}
else
{
PropertyInfo viewChangeHandler = element.GetType()
.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Single(p => p.Name == attribute.ChangeHandler);
subscriber = handler =>
{
Action current = (Action)viewChangeHandler.GetValue(element);
current += handler;
viewChangeHandler.SetValue(element, current);
};
mode = BindingMode.TwoWay;
}
element.BindingContext.BindProperty(
subscriber,
elementProperty.CreateGetDelegate <dynamic>(element),
elementProperty.CreateSetDelegate <dynamic>(element),
elementProperty.Name,
binding.Target,
mode);
}