using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsThreading
{
    public partial class FormTimer : Form
    {

        //线程暂停时间 单位：毫秒
        static int _timespan = 2000;

        //每页显示行数 范围1-5
        static int _pagerowcount = 4;

        //每行固定显示5个
        static int _pagerownumber = 5;

        //总页数
        static int _pagetotal = 0;

        //当前页
        static int _pageindex = 1;

        static int _rowindex = 0;

        //获取正在处理列表
        private static IList<string> _namelist;

        //声明定时器
        private static System.Threading.Timer _timer;

        //定义委托
        private delegate void SetTLPNameListDelegate();

        //声明委托变量
        private SetTLPNameListDelegate _settlpnamelist;

        public FormTimer()
        {
            InitializeComponent();
            _settlpnamelist = LoadLEDForm;//设置委托变量的方法
            BeginTimer();
        }

        private void BeginTimer()
        {
            //TimerCallback 委托，指定timer定时器需要执行的方法 ThreadMethod
            TimerCallback tmrcallback = new TimerCallback(ThreadMethod);
            //示例化定时器
            _timer = new System.Threading.Timer(tmrcallback, null, 0, _timespan);
        }

        private void ThreadMethod(object state)
        {
            if (this.InvokeRequired)
                this.Invoke(_settlpnamelist);
        }

        /// <summary>
        /// 设置正在处理列表
        /// </summary>
        private void LoadLEDForm()
        {
            SetQueueOrder();
            SetName();
            SetNameList();
        }
        /// <summary>
        /// 设置等待列表
        /// </summary>
        private void SetNameList()
        {
            if (_pageindex == 1)
            {
                GetNameList();
                _pagetotal = (int)Math.Ceiling((float)_namelist.Count / (_pagerowcount * _pagerownumber));

                if (_pagetotal < 1) { _pagetotal = 1; }
            }
            if (_namelist != null && _namelist.Count > 0)
            {
                int column = 0;
                tlpaNameList.Controls.Clear();
                _rowindex = 0;
                int i = 0;
                int startIndex = (_pageindex - 1) * (_pagerowcount * _pagerownumber);
                int endIndex = _pageindex * (_pagerowcount * _pagerownumber);
                for (; i < _namelist.Count; i++)
                {
                    if (i >= startIndex && i < endIndex)
                    {
                        if (_rowindex > _pagerowcount - 1)
                            break;
                        if (column > _pagerownumber - 1)
                        {
                            column = 0;
                            _rowindex++;
                        }
                        Addlabel(_namelist[i], column);
                        column++;
                    }
                }
                lblPageNumber.Text = string.Format("页码 {0}/{1}", _pageindex, _pagetotal);
                _pageindex++;
                if (_pageindex > _pagetotal)
                {
                    _pageindex = 1;
                }
            }
        }

        /// <summary>
        /// 设置排队叫号
        /// </summary>
        private void SetQueueOrder()
        {
            lblOrder.Text = _pageindex + " 号";
        }

        /// <summary>
        /// 设置催缴费
        /// </summary>
        private void SetName()
        {
            lblName.Text = "唐鑫瑞" + _pageindex;
        }

        private void Addlabel(String text, int columnindex)
        {
            Label label = new Label();
            label.Dock = DockStyle.Top;
            label.ForeColor = Color.Yellow;
            label.BackColor = Color.Black;
            label.Font = new System.Drawing.Font("宋体", 12F);
            label.Text = text;
            label.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
            tlpaNameList.Controls.Add(label, columnindex, _rowindex);
        }

        /// <summary>
        /// 模拟一个列表（列表中有30个对象），每个列表显示完成后，自动新增一个对象，用来模拟等待列表的人数在增加
        /// </summary>
        public void GetNameList()
        {
            if (_namelist == null || _namelist.Count < 1)
            {
                _namelist = new List<string>();
                for (int i = 1; i < 31; i++)
                {
                    _namelist.Add("唐鑫瑞" + i);
                }
            }
            else
            {
                if (_pageindex == 1)
                    _namelist.Add("唐鑫瑞" + (_namelist.Count + 1));
            }
        }

        private void FormTimer_Load(object sender, EventArgs e)
        {

        }
    }
}