public ButtonViewModel(int row,int col,Game game)
{
this.game = game;
pos = new Vector2D(row-1,col-1);
Owner = game.Board[pos].Owner;
IsValidMove = game.Board[pos].IsValidMove;
Square = game.Board[pos];
click=new ClickCommand(this);
}
private int Weight( IGrid<Player> board, Vector2D p )
{
if ( board.InCorner( p ) )
{
return cornerWeight;
}
else if ( board.OnRim( p ) )
{
return rimWeight;
}
else
{
return 1;
}
}
public bool IsValidMove( Vector2D position )
{
return state.Value.IsValidMove( position );
}
public int? FindDistanceToCaptureTwin( Vector2D position, Vector2D direction, Player player )
{
var slice = grid.Slice( position, direction );
for ( var i = 1; i < slice.End; ++i )
{
if ( slice[i].Value == null )
{
return null;
}
else if ( slice[i].Value == player )
{
return i;
}
}
return null;
}
public Square( Game game, Vector2D position )
{
this.game = game;
this.position = position;
this.owner = Cell.Derived( () => game.GetOwnerAt( position ) );
this.isValidMove = Cell.Derived( () => game.IsValidMove( position ) );
}
public abstract bool IsValidMove( Vector2D position );
public IEnumerable<Vector2D> Captured( Vector2D position )
{
return state.Value.Captured( position );
}
public void PlaceStone( Vector2D position, Player player )
{
if ( !IsValidMove( position, player ) )
{
throw new ArgumentException( string.Format( "{0} cannot place stone on position {1}", player.ToString(), position.ToString() ) );
}
else
{
this.grid[position].Value = player;
CaptureStones( position, player );
}
}
public override void MakeMove( Vector2D position )
{
if ( !IsValidMove( position ) )
{
throw new ArgumentException( "Not a valid move" );
}
else
{
board.PlaceStone( position, currentPlayer );
if ( board.HasValidMove( currentPlayer.Other ) )
{
currentPlayer = currentPlayer.Other;
}
else if ( !board.HasValidMove( currentPlayer ) )
{
state.Value = new GameOver( state, board );
}
}
}
public int ManhattanDistanceTo( Vector2D v )
{
if ( v == null )
{
throw new ArgumentNullException( "v" );
}
else
{
return Math.Abs( X - v.X ) + Math.Abs( Y - v.Y );
}
}
public override bool IsValidMove( Vector2D position )
{
return false;
}
public Player this[Vector2D position]
{
get
{
return this.grid[position].Value;
}
}
public bool Equals( Vector2D v )
{
return !object.ReferenceEquals( v, null ) && this.x == v.x && this.y == v.y;
}
private void CaptureStones( Vector2D position, Player player )
{
foreach ( var p in CapturedStones( position, player ) )
{
grid[p].Value = player;
}
}
private IEnumerable<Vector2D> CapturedStones( Vector2D position, Vector2D direction, Player player )
{
var distanceToTwin = FindDistanceToCaptureTwin( position, direction, player );
if ( distanceToTwin.HasValue )
{
for ( var i = 1; i != distanceToTwin; ++i )
{
var p = position + i * direction;
yield return p;
}
}
}
private static Player StoneAtPositionInDefaultInitialGrid( Vector2D position )
{
if ( position == new Vector2D( 3, 4 ) || position == new Vector2D( 4, 3 ) )
{
return Player.ONE;
}
else if ( position == new Vector2D( 3, 3 ) || position == new Vector2D( 4, 4 ) )
{
return Player.TWO;
}
else
{
return null;
}
}
public void MakeMove( Vector2D position )
{
state.Value.MakeMove( position );
}
public override IEnumerable<Vector2D> Captured( Vector2D position )
{
if ( IsValidMove( position ) )
{
return board.CapturedStones( position, currentPlayer );
}
else
{
return Enumerable.Empty<Vector2D>();
}
}
public override IEnumerable<Vector2D> Captured( Vector2D position )
{
throw new InvalidOperationException();
}
public bool IsValidMove( Vector2D position, Player player )
{
if ( position == null )
{
throw new ArgumentNullException( "position" );
}
else if ( player == null )
{
throw new ArgumentNullException( "player" );
}
else if ( grid[position].Value == null )
{
foreach ( var direction in Vector2D.Directions )
{
var distance = FindDistanceToCaptureTwin( position, direction, player );
if ( distance.HasValue && distance.Value > 1 )
{
return true;
}
}
return false;
}
else
{
return false;
}
}
public override void MakeMove( Vector2D position )
{
throw new InvalidOperationException( "Game is over, cannot make moves" );
}
public override void MakeMove( Vector2D position )
{
throw new InvalidOperationException();
}
public override bool IsValidMove( Vector2D position )
{
return board.IsValidMove( position, this.currentPlayer );
}
/// <summary>
/// Computes which positions would be captured if the current player
/// were to put his next stone at the specified position.
/// </summary>
/// <param name="position">Position at which the current player intends to put his stone.</param>
/// <returns>A sequence of all stones that would be captured by the specified move.</returns>
private IEnumerable<Vector2D> CapturedBy( Vector2D position )
{
return gameState.Captured( position );
}
public abstract IEnumerable<Vector2D> Captured( Vector2D position );
private Player GetOwnerAt( Vector2D position )
{
return gameState.Board[position];
}
public abstract void MakeMove( Vector2D position );
private bool IsValidMove( Vector2D position )
{
return gameState.IsValidMove( position );
}
private void PlaceStone( Vector2D position )
{
gameState.MakeMove( position );
Refresh();
}
public IEnumerable<Vector2D> CapturedStones( Vector2D position, Player player )
{
foreach ( var direction in Vector2D.Directions )
{
foreach ( var p in CapturedStones( position, direction, player ) )
{
yield return p;
}
}
}