internal void OnComponentRemoved(IEntityComponent comp)
{
var meth = ObjUtil.ExtractDelegate <Action <GameTime> >(comp, EntityConstants.MSG_UPDATE);
if (meth != null)
{
_updateDelegates -= meth;
}
}
internal void OnComponentAdd(IEntityComponent comp)
{
var meth = ObjUtil.ExtractDelegate <Action <GameTime> >(comp, EntityConstants.MSG_UPDATE);
if (meth != null)
{
_updateDelegates += meth;
}
if (_manager != null)
{
_manager.RegisterComponent(comp);
}
}
public IEntityComponent AddComponent(Type tp)
{
if (tp == null)
{
throw new ArgumentNullException("tp");
}
if (!typeof(IEntityComponent).IsAssignableFrom(tp))
{
throw new ArgumentException("Type must implement IEntityComponent.");
}
IEntityComponent comp = this.GetComponent(tp);
if (comp != null)
{
return(comp);
}
try
{
comp = System.Activator.CreateInstance(tp) as IEntityComponent;
}
catch
{
return(null);
}
if (comp is EntityComponent)
{
_lst.Add(comp);
(comp as EntityComponent).OnAddedToEntity(_owner);
}
else
{
var meth = ObjUtil.ExtractDelegate <Action <Entity> >(comp, EntityConstants.MSG_ONADDEDTOENTITY);
if (meth != null)
{
_lst.Add(comp);
meth(_owner);
}
else
{
throw new EntityComponentMalformedException("Custom rolled IEntityComponents must contain a 'OnAddedToEntity' method present as a member.");
}
}
_owner.OnComponentAdd(comp);
return(comp);
}
public T AddComponent <T>() where T : class, IEntityComponent
{
T comp = this.GetComponent <T>();
if (comp != null)
{
return(comp);
}
try
{
comp = System.Activator.CreateInstance <T>();
}
catch
{
return(null);
}
if (comp is EntityComponent)
{
_lst.Add(comp);
(comp as EntityComponent).OnAddedToEntity(_owner);
}
else
{
var meth = ObjUtil.ExtractDelegate <Action <Entity> >(comp, EntityConstants.MSG_ONADDEDTOENTITY);
if (meth != null)
{
_lst.Add(comp);
meth(_owner);
}
else
{
throw new EntityComponentMalformedException("Custom rolled IEntityComponents must contain a 'OnAddedToEntity' method present as a member.");
}
}
_owner.OnComponentAdd(comp);
return(comp);
}
/// <summary>
/// Call a method with shape of delegate T. Note this method can be slow so don't overuse.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="msg"></param>
/// <param name="args"></param>
public void SendMessage <T>(string msg, params object[] args) where T : class
{
Delegate messageReceiver = null;
foreach (var comp in this.Components)
{
var meth = ObjUtil.ExtractDelegate <T>(comp, msg);
if (meth != null)
{
messageReceiver = Delegate.Combine(messageReceiver as Delegate, meth as Delegate);
}
}
if (messageReceiver != null)
{
try
{
messageReceiver.DynamicInvoke(args);
}
catch
{
}
}
}
