protected virtual void OnBeforeChange(RejectableCustomEventArgs <T> eventArgs)
{
var handler = BeforeChange;
if (handler != null)
{
handler(this, eventArgs);
}
}
public bool PrepareListChange(T item, Operation operation)
{
var rejArg = new RejectableCustomEventArgs <T>(operation, item, internalList.Count);
OnBeforeChange(rejArg);
if (!rejArg.IsOperationRejected)
{
if (operation.ToString() == "Add")
{
internalList.Add(item);
}
else
{
internalList.Remove(item);
}
var arg = new ListChangedEventArgs <T>(operation, item, internalList.Count);
OnChanged(arg);
return(true);
}
else
{
return(false);
}
}
