using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 动态创建
{
    public partial class Form1 : Form
    {
        int iclick1 = -1;
        int iclick2 = -1;
        Button[] btns = new Button[16];
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //自动创建
           
             for (int i = 0; i < 16; i++)
             {
                 btns[i] = new Button();
                 btns[i].Name = i.ToString();//加个名字方便集中操作
                 btns[i].Size = new Size(48, 48);
                 int ix = 20+60*(i%4);
                 int iy = 20+60*(i/4);
                 btns[i].Location = new Point(ix, iy);
                 this.Controls.Add(btns[i]);
                 //绑定事件
                 btns[i].Click += new System.EventHandler(this.btns_Click); 
                 btns[i].MouseHover+=new System.EventHandler(this.btns_MouseHover);
                 btns[i].MouseLeave+=new System.EventHandler(this.btns_MouseLeave);
             }
        }
        //集中事件处理
        private void btns_Click(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            int index = int.Parse(btn.Name);
            if (index == 0 || index == 3 || index == 12 || index == 15)
            {
                //将上一个选择的按钮状态变为空
                if (iclick1 != -1)
                    btns[iclick1].Text = "";
                if (iclick2 != -1)
                    btns[iclick2].Text = "";
                iclick1 = index;
                btn.BackColor = Color.Empty;
                btn.ForeColor = Color.Black;
                btn.Text = "1";
            }
            if (index == 1 || index == 4)
            {
                if (iclick1 != 0)
                    return;
                //将上一个选择的按钮状态变为空
                if(iclick2 != -1)
                    btns[iclick2].Text = "";
                iclick2 = index;
                btn.BackColor = Color.Empty;
                btn.ForeColor = Color.Black;
                btn.Text = "2";
            }
            if (index == 2 || index == 7)
            {
                if (iclick1 != 3)
                    return;
                //将上一个选择的按钮状态变为空
                if (iclick2 != -1)
                    btns[iclick2].Text = "";
                iclick2 = index;
                btn.BackColor = Color.Empty;
                btn.ForeColor = Color.Black;
                btn.Text = "2";
            }
              if (index == 8 || index == 13)
            {
                if (iclick1 != 12)
                    return;
                //将上一个选择的按钮状态变为空
                if (iclick2 != -1)
                    btns[iclick2].Text = "";
                iclick2 = index;
                btn.BackColor = Color.Empty;
                btn.ForeColor = Color.Black;
                btn.Text = "2";
            }
             if (index == 11 || index == 14)
            {
                if (iclick1 != 15)
                    return;
                //将上一个选择的按钮状态变为空
                if (iclick2 != -1)
                    btns[iclick2].Text = "";
                iclick2 = index;
                btn.BackColor = Color.Empty;
                btn.ForeColor = Color.Black;
                btn.Text = "2";
            }
            
        }
        private void btns_MouseHover(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            int index = int.Parse(btn.Name);
            if (index == iclick1)
                return;
            //4 个角可能按出1
            if (index == 0 || index == 3 || index == 12 || index == 15)
            {
                btn.BackColor = Color.Gray;
                btn.ForeColor = Color.White;
                btn.Text = "1";
            }
            //4个角旁边可能按出2
            if (index == 1 || index == 4)
            {
                if (iclick1 != 0)
                    return;
                btn.BackColor = Color.Gray;
                btn.ForeColor = Color.White;
                btn.Text = "2";
            }
            if (index == 2 || index == 7)
            {
                if (iclick1 != 3)
                    return;
                btn.BackColor = Color.Gray;
                btn.ForeColor = Color.White;
                btn.Text = "2";
            }
            if (index == 8 || index == 13)
            {
                if (iclick1 != 12)
                    return;
                btn.BackColor = Color.Gray;
                btn.ForeColor = Color.White;
                btn.Text = "2";
            }
            if (index == 11 || index == 14)
            {
                if (iclick1 != 15)
                    return;
                btn.BackColor = Color.Gray;
                btn.ForeColor = Color.White;
                btn.Text = "2";
            }
        }
        private void btns_MouseLeave(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            int index = int.Parse(btn.Name);
            if (index == iclick1 || index == iclick2)
                return;
            btn.BackColor = Color.Empty;
            btn.ForeColor = Color.Black;
            btn.Text = "";
        }
    }
}