/// <summary>
/// Overrides the abstract method for popping.
/// </summary>
/// <param name="row">The currently active row.</param>
/// <param name="col">The currently active column.</param>
/// <param name="board">The game board.</param>
/// <param name="cellValue">The initial balloon value.</param>
protected override void PopBalloons(int row, int col, IBoard board, int cellValue)
{
if (board.IsValidPop(row, col) &&
board[row, col].Value == cellValue)
{
board[row, col] = Balloon.Default;
this.PopBalloons(row - 1, col, board, cellValue); // Up
this.PopBalloons(row + 1, col, board, cellValue); // Down
this.PopBalloons(row, col + 1, board, cellValue); // Left
this.PopBalloons(row, col - 1, board, cellValue); // Right
}
}