public void AddPositional(Positional <TBoard> positional)
{
// disallow repeated adding
if (Positionals.Contains(positional))
{
return;
}
// if it is from another board, we remove it from there first,
// before adding to the current one.
if (positional.Board != null)
{
positional.Board.RemovePositional(positional);
}
positional.SetBoardDirectly(this as TBoard);
Positionals.Add(positional);
Position position = positional.Position;
// very important to reset the position with the new finenessLimit value
positional.Position = new Position(position.X, position.Y, position.FinenessX, position.FinenessY, this.FinenessLimit);
OnAddingPositional(new PositionalEventArgs <TBoard>(positional));
}
public bool RemovePositional(Positional <TBoard> positional)
{
// if it is not supposed to be from this board,
// just return false and do nothing.
if (!Positionals.Contains(positional))
{
return(false);
}
// by setting the positional.Board to null
// all the bindings from logic to board will be removed
// this is because positional.Board is made to be virtual
positional.Board = null;
Positionals.Remove(positional);
OnRemovingPositional(new PositionalEventArgs <TBoard>(positional));
return(true);
}