protected virtual bool Subscribe(Type targetType)
{
var target = this.AssociatedObject.GetSelfAndAncestors()
.FirstOrDefault(x =>
{
var type = x.GetType();
return((type == targetType) || type.IsSubclassOf(targetType));
});
if (target is null)
{
return(false);
}
var behavior = Interaction.GetBehaviors(target).OfType <IItemBehavior>().FirstOrDefault();
if (behavior is null)
{
return(false);
}
Group = behavior.Group ?? new ItemBehaviorGroup();
return(Group.Behaviors.Add(this));
}
protected virtual void Unsubscribe()
{
Group?.Behaviors.Remove(this);
Group = null;
}