/// <summary>
/// Removes the specified observable.
/// </summary>
/// <param name="observable">The observable.</param>
public void Remove([NotNull] IPropertyObservable observable)
{
if (observable == null)
{
throw new ArgumentNullException(nameof(observable));
}
if (!this.dictionary.TryGetValue(observable, out var handler))
{
return;
}
this.dictionary.Remove(observable);
CommandManager.RequerySuggested -= handler;
}
/// <summary>
/// Adds the specified observable.
/// </summary>
/// <param name="observable">The observable.</param>
public void Add([NotNull] IPropertyObservable observable)
{
if (observable == null)
{
throw new ArgumentNullException(nameof(observable));
}
if (this.dictionary.TryGetValue(observable, out _))
{
return;
}
void Handler(object sender, EventArgs args) => observable.RaisePropertyChanged();
this.dictionary.Add(observable, Handler);
CommandManager.RequerySuggested += Handler;
}
