public void Subscribe(object target, Action action)
{
if (target != null && memberInfo != null)
{
changeAction = Binding.AddMemberChangeAction(target, memberInfo, i => action());
}
}
internal static MemberChangeAction AddMemberChangeAction(object target, MemberInfo member, Action <int> k)
{
MemberChangeAction sub = null;
if (target is INotifyPropertyChanged)
{
var key = Tuple.Create(target, member);
if (objectSubs.TryGetValue(target, out var subs) == false)
{
subs = new Dictionary <MemberInfo, MemberActions>
{
{ member, new MemberActions(target, member) },
};
objectSubs.Add(target, subs);
}
// Debug.WriteLine ("ADD CHANGE ACTION " + target + " " + member);
sub = new MemberChangeAction(target, member, k);
if (subs.ContainsKey(member) == false)
{
subs.Add(member, new MemberActions(target, member));
}
subs[member].AddAction(sub);
}
return(sub);
}
public void RemoveAction(MemberChangeAction action)
{
actions.Remove(action);
if (actions.Count == 0)
{
UnsubscribeFromChangeNotificationEvent();
}
}
/// <summary>
/// Add the specified action to be executed when Notify() is called.
/// </summary>
/// <param name="action">Action.</param>
public void AddAction(MemberChangeAction action)
{
if (actions.Count == 0)
{
AddChangeNotificationEventHandler();
}
actions.Add(action);
}
internal static void RemoveMemberChangeAction(MemberChangeAction sub)
{
if (objectSubs.TryGetValue(sub.Target, out var subs))
{
if (subs.TryGetValue(sub.Member, out var memberActions))
{
// Debug.WriteLine ("REMOVE CHANGE ACTION " + sub.Target + " " + sub.Member);
memberActions.RemoveAction(sub);
if (memberActions.Count == 0)
{
subs.Remove(sub.Member);
}
}
if (subs.Count == 0)
{
objectSubs.Remove(sub.Target);
}
}
}
