模仿ICE的structured panorama小按钮

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  =  "";
        }
    }
}