Tetris/Tetrominos/TetrominoFactory.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static Tetris.Tetromino;

namespace Tetris.Tetrominos
{
    /// <summary>
    /// 方块工厂类
    /// </summary>
    public class TetrominoFactory
    {
        private Random random = new Random();

        private static TetrominoFactory instance = new TetrominoFactory();

        private TetrominoFactory(){}

        public static TetrominoFactory GetInstance()
        {
            return instance;
        }

        

        /// <summary>
        /// 通过枚举类型获取指定类型的方块
        /// </summary>
        /// <param name="tetrominoType">方块枚举类型</param>
        /// <returns>指定类型的方块</returns>
        public Tetromino GetTetromino(TetrominoType tetrominoType)
        {
            switch (tetrominoType)
            {
                case TetrominoType.TypeI:
                    return new TetrominoTypeI();
                case TetrominoType.TypeJ:
                    return new TetrominoTypeJ();
                case TetrominoType.TypeL:
                    return new TetrominoTypeL();
                case TetrominoType.TypeO:
                    return new TetrominoTypeO();
                case TetrominoType.TypeS:
                    return new TetrominoTypeS();
                case TetrominoType.TypeZ:
                    return new TetrominoTypeZ();
                case TetrominoType.TypeT:
                    return new TetrominoTypeT();
            }
            throw new NotSupportedException("no such TetrominoType");
        }

        public LinkedList<Tetromino> GetTetrominoQueue(int size)
        {
            LinkedList<Tetromino> queue = new LinkedList<Tetromino>();
            for(int i = 0; i < size; i++)
            {
                queue.AddLast(GetTetromino((TetrominoType)Enum.ToObject(typeof(TetrominoType)