/// <summary>
/// Connects a <see cref="FrameworkElement"/> to its parent <see cref="AttachedShadowBase"/> definition.
/// </summary>
/// <param name="parent">The <see cref="AttachedShadowBase"/> that is using this context.</param>
/// <param name="element">The <see cref="FrameworkElement"/> that a shadow is being attached to.</param>
internal void ConnectToElement(AttachedShadowBase parent, FrameworkElement element)
{
if (_isConnected)
{
throw new InvalidOperationException("This AttachedShadowElementContext has already been connected to an element");
}
_isConnected = true;
Parent = parent ?? throw new ArgumentNullException(nameof(parent));
Element = element ?? throw new ArgumentNullException(nameof(element));
Element.Loaded += OnElementLoaded;
Element.Unloaded += OnElementUnloaded;
Initialize();
}
/// <summary>
/// Attaches a shadow to an element by setting the <see cref="ShadowProperty"/> property.
/// </summary>
/// <param name="obj">The <see cref="FrameworkElement"/> to attach the shadow to.</param>
/// <param name="value">The <see cref="AttachedShadowBase"/> that will be attached to the element</param>
public static void SetShadow(FrameworkElement obj, AttachedShadowBase value)
{
obj.SetValue(ShadowProperty, value);
}
