/// <summary>
/// Executes an action when a content of the provided type is added or removed from the controller
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="addedCallback">Callback to invoke when the content is added</param>
/// <param name="removedCallback">Callback to invoke when the content is removed</param>
/// <returns>A registration object that can be disposed to cancel the callback invocation.</returns>
public IDisposable RunWhenContentAddedOrRemoved <T> (Action <T> addedCallback, Action <T> removedCallback)
{
if (contentCallbackRegistry == null)
{
contentCallbackRegistry = new ContentCallbackRegistry(GetContent);
}
return(contentCallbackRegistry.RunWhenContentAddedOrRemoved(addedCallback, removedCallback));
}
/// <summary>
/// Executes an action when a content of the provided type is removed from the controller
/// </summary>
/// <typeparam name="T">Type of the content to track</typeparam>
/// <param name="contentCallback">Callback to invoke when the content is removed</param>
/// <returns>A registration object that can be disposed to cancel the callback invocation.</returns>
public IDisposable RunWhenContentRemoved <T> (Action <T> contentCallback)
{
if (contentCallbackRegistry == null)
{
contentCallbackRegistry = new ContentCallbackRegistry(GetContent);
}
return(contentCallbackRegistry.RunWhenContentRemoved(contentCallback));
}
