/// <summary>
/// Register to listen for eventID.
/// </summary>
/// <param name="eventID">EventID that object want to listen</param>
/// <param name="callback">Callback will be invoked when this eventID be raised</param>
public void RegisterListener(ObserverEventID eventID, Action <object> callback)
{
// checking params
Debug.Assert(callback != null, string.Format("AddListener, event {0}, callback is null !!", eventID.ToString()));
Debug.Assert(eventID != ObserverEventID.None, "RegisterListener, event = None !!");
// check if listener exist in distionary
if (listenersDict.ContainsKey(eventID))
{
// add callback to our collection
listenersDict[eventID] += callback;
}
else
{
// add new key-value pair
listenersDict.Add(eventID, null);
listenersDict[eventID] += callback;
}
}
/// <summary>
/// Removes the listener. Use to unregister listener.
/// </summary>
/// <param name="eventID">Event that object want to listen.</param>
/// <param name="callback">Callback action.</param>
public void RemoveListener(ObserverEventID eventID, Action <object> callback)
{
// checking params
Debug.Assert(callback != null, string.Format("RemoveListener, event {0}, callback is null.", eventID.ToString()));
Debug.Assert(eventID != ObserverEventID.None, "AddListener, event = None.");
if (listenersDict.ContainsKey(eventID))
{
listenersDict[eventID] -= callback;
}
else
{
Debug.LogWarning("RemoveListener, tried to remove nonexistent key : " + eventID);
}
}