using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using POSV.MessageEvent;
using POSV.Utils;
using POSV.Bean;
using POSV.Entity;
using DevComponents.DotNetBar.Metro;
using DevComponents.DotNetBar;
using System.Runtime.InteropServices;
using System.Threading;
using POSV.ShoppingCart;

namespace POSV.Component
{
    [ToolboxItem(true)]
    public partial class ProductControl : BaseUserControl
    {
        /// <summary>
        /// 数据源
        /// </summary>
        private List<ProductExt> _dataSource = null;

        /// <summary>
        /// 键盘、方向键、搜索操作标识
        /// </summary>
        private KeyboardAction _action = KeyboardAction.None;

        /// <summary>
        /// 当前焦点索引
        /// </summary>
        private int _index = 0;
        /// <summary>
        /// 当前焦点单品
        /// </summary>
        private MetroTileItem _curr = null;

        public ProductControl()
        {
            InitializeComponent();

            this.BackColor = Color.Transparent;

            //订购界面变更通知事件
            MsgEvent.Receive(Constant.PRODUCT_CHANGED_NOTIFY , this.ProductChangedEventNotify);

            //订购沽清通知事件
            MsgEvent.Receive(Constant.SALE_CLEAR_CHANGED_NOTIFY , this.SaleClearChangedEventNotify);

            //单品键盘通知事件
            MsgEvent.Receive(Constant.PRODUCT_KEYBOARD_NOTIFY , this.ProductKeyboardEventNotify);
        }

        protected void ProductKeyboardEventNotify(object sender , MsgEventArgs args)
        {
            if (args != null && args.Data != null)
            {
                Enum.TryParse<KeyboardAction>(args.Data.ToString() , out this._action);

                switch (this._action)
                {
                    case KeyboardAction.Left:
                        {
                            if (this.itemPanel.Items.Count > 0)
                            {
                                var container = this.itemPanel.Items[0] as ItemContainer;
                                int subItems = container.SubItems.Count;

                                //只有一个单品
                                if(subItems == 1)
                                {
                                    //当前操作的
                                    this._index = 0;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }

                                if (this._index - 1 >= 0)
                                {
                                    //当前操作的，重置样式
                                    var focus = container.SubItems[this._index] as MetroTileItem;
                                    this.ResetMetroTileItemStyle(focus);

                                    //当前操作的
                                    this._index = this._index - 1;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }
                            }

                        }
                        break;
                    case KeyboardAction.Right:
                        {
                            if (this.itemPanel.Items.Count > 0)
                            {
                                var container = this.itemPanel.Items[0] as ItemContainer;
                                int subItems = container.SubItems.Count;

                                //只有一个单品
                                if (subItems == 1)
                                {
                                    //当前操作的
                                    this._index = 0;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }
                                
                                if (this._index + 1 < subItems)
                                {
                                    //重置当前样式
                                    var focus = container.SubItems[this._index] as MetroTileItem;
                                    this.ResetMetroTileItemStyle(focus);

                                    //当前操作的
                                    this._index = this._index + 1;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }
                            }
                        }
                        break;
                    case KeyboardAction.Up:
                        {
                            if (this.itemPanel.Items.Count > 0)
                            {
                                var container = this.itemPanel.Items[0] as ItemContainer;
                                int subItems = container.SubItems.Count;

                                //只有一个单品
                                if (subItems == 1)
                                {
                                    //当前操作的
                                    this._index = 0;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }

                                if (this._index - this.Columns >= 0)
                                {
                                    //重置当前样式
                                    var focus = container.SubItems[this._index] as MetroTileItem;
                                    this.ResetMetroTileItemStyle(focus);

                                    //当前操作的
                                    this._index = this._index - this.Columns;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }
                            }

                        }
                        break;
                    case KeyboardAction.Down:
                        {
                            if (this.itemPanel.Items.Count > 0)
                            {
                                var container = this.itemPanel.Items[0] as ItemContainer;
                                int subItems = container.SubItems.Count;

                                //只有一个单品
                                if (subItems == 1)
                                {
                                    //当前操作的
                                    this._index = 0;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }

                                if (this._index + this.Columns < subItems)
                                {
                                    //重置当前样式
                                    var focus = container.SubItems[this._index] as MetroTileItem;
                                    this.ResetMetroTileItemStyle(focus);

                                    //当前操作的
                                    this._index = this._index + Columns;
                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }
                            }

                        }
                        break;
                    case KeyboardAction.Search:
                        {
                            if (this.itemPanel.Items.Count > 0)
                            {
                                var container = this.itemPanel.Items[0] as ItemContainer;

                                if(container.SubItems.Count > 0)
                                {
                                    this._index = 0;

                                    this._curr = container.SubItems[this._index] as MetroTileItem;

                                    this.UpdateSelectedStyle(this._curr);
                                }

                                LOGGER.Info(">>>>>*****>>>>>{0}" , this._curr != null ? this._curr.Text : "&&&&&");
                            }
                        }
                        break;
                    case KeyboardAction.Enter:
                        {
                            LOGGER.Info(">>>>>*****>>>>>Enter>>>>{0}" , this._curr == null ? "" : this._curr.Name);
                            if (this._curr != null)
                            {
                                var r = this.RectangleToScreen(this._curr.DisplayRectangle);
                               
                                int dx = (r.Left + this._curr.TileSize.Width / 2);
                                int dy = (r.Top + this._curr.TileSize.Height / 2);

                                var e = new MouseEventArgs(MouseButtons.Left , 1 , dx , dy , 0);

                                SetCursorPos(dx, dy);

                                LOGGER.Info(">>>>>*****>>>>>{0},{1}" , dx,dy);

                                this.OnItemMouseDown(this._curr , e);
                            }
                        }
                        break;
                }               

            }
        }

        [DllImport("User32.dll")]
        private static extern bool SetCursorPos(int x , int y);


        public void UpdateSelectedStyle(MetroTileItem item)
        {
            item.TileStyle.Font = this.GetSystemFont(this.SelProductFont);
            item.TileStyle.TextColor = ColorTranslator.FromHtml(this.SelTextColor);
            item.TitleTextColor = ColorTranslator.FromHtml(this.SelTextColor);

            item.TileStyle.BackColor = ColorTranslator.FromHtml(this.SelBackColor);
            item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.SelBackColor);
            item.TileStyle.BorderColor = ColorTranslator.FromHtml(this.SelBackColor);
            item.TileStyle.BorderColor2 = ColorTranslator.FromHtml(this.SelBackColor);
        }

        protected void SaleClearChangedEventNotify(object sender , MsgEventArgs args)
        {
            if(this.itemPanel.Items.Count > 0)
            {
                var saleClear = args.Data as SaleClear;

                var container = this.itemPanel.Items[0] as ItemContainer;
                
                LOGGER.Info("当前沽清记录数量:{0}" , SaleClearUtils.Instance.Maps.Count);

                if (container.SubItems.Contains(saleClear.ProductId))
                {
                    var item = container.SubItems[saleClear.ProductId];

                    var metro = item as MetroTileItem;
                    var entity = metro.Tag as ProductExt;

                    entity.SaleClear = this.getSaleClear(entity.Id);

                    this.UpdateSaleClear(metro , entity);
                }
                
            }

        }
        
        public void ResetMetroTileItemStyle(MetroTileItem item)
        {
            var entity = item.Tag as ProductExt;
            switch (entity.Name)
            {
                case Constant.PREV_PAGER:
                    {
                        item.TileStyle.BackColor = ColorTranslator.FromHtml(this.PagerColor1);
                        item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                        //item.TileStyle.BorderColor = ColorTranslator.FromHtml(this.PagerColor1);
                        //item.TileStyle.BorderColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                    }
                    break;
                case Constant.NEXT_PAGER:
                    {
                        item.TileStyle.BackColor = ColorTranslator.FromHtml(this.PagerColor1);
                        item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                        //item.TileStyle.BorderColor = ColorTranslator.FromHtml(this.PagerColor1);
                        //item.TileStyle.BorderColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                    }
                    break;
                default:
                    {
                        item.TileStyle.Font = this.GetSystemFont(this.FontSize);

                        item.TileStyle.TextColor = ColorTranslator.FromHtml(this.TextColor);
                        item.TitleTextColor = ColorTranslator.FromHtml(this.TextColor);

                        item.TileStyle.BackColor = ColorTranslator.FromHtml(this.BackColor1);
                        item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.BackColor2);

                        //item.TileStyle.BorderColor = ColorTranslator.FromHtml(this.BackColor1);
                        //item.TileStyle.BorderColor2 = ColorTranslator.FromHtml(this.BackColor2);

                        this.UpdateSaleClear(item , entity);
                    }
                    break;
            }
        }


        protected void ProductChangedEventNotify(object sender , MsgEventArgs args)
        {
            if (args.Data is ProductItem)
            {
                var data = args.Data as ProductItem;

                Global.Instance.ReloadConfig(ConfigConstant.PRODUCT_GROUP);

                this.RefreshUi(data);

                this.BindDataSource(this._dataSource);
            }
        }
        

        protected override void OnPaint(PaintEventArgs e)
        {
            //base.OnPaint(e);
            Rectangle rect = new Rectangle(0 , 0 , this.Width , this.Height);
            ControlPaint.DrawBorder(e.Graphics , rect , Color.Transparent , ButtonBorderStyle.Solid);//画个边框   
            //ControlPaint.DrawBorder(e.Graphics , rect ,
            //    Color.Transparent , 1 , ButtonBorderStyle.Solid ,
            //    Color.Transparent , 1 , ButtonBorderStyle.Solid ,
            //    Color.Transparent , 1 , ButtonBorderStyle.Solid ,
            //    Color.Transparent , 1 , ButtonBorderStyle.Solid
            //);
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            if (this.DesignMode) return;

            var productJsonTemplate = Global.Instance.GlobalConfigStringValue(ConfigConstant.PRODUCT_JSON_TEMPLATE);
            if (string.IsNullOrEmpty(productJsonTemplate))
            {
                productJsonTemplate = JsonUtils.Serialize(new ProductItem());
            }

            this.RefreshUi(JsonUtils.Deserialize<ProductItem>(productJsonTemplate));

            //当前页码
            this.PageNumber = 1;
        }

        public void RefreshUi(ProductItem item)
        {

            this.FontSize = item.ProductFont;

            this.Columns = item.Columns;

            this.ItemWidth = item.ItemWidth;
            this.ItemHeight = item.ItemHeight;

            this.BackColor1 = item.BackColor1;
            this.BackColor2 = item.BackColor2;
            this.TextColor = item.TextColor;

            this.PagerColor1 = item.PagerColor1;
            this.PagerColor2 = item.PagerColor2;

            this.ShowType = item.ShowType;
            
            this.SaleClearColor = item.SaleClearColor;
            this.SaleClearFont = item.SaleClearFont;
            this.SaleClearTextColor = item.SaleClearTextColor;
            this.SaleStopColor = item.SaleStopColor;
            this.SaleClearNotifyColor = item.SaleClearNotifyColor;

            this.SelBackColor = item.SelBackColor;
            this.SelTextColor = item.SelTextColor;
            this.SelProductFont = item.SelProductFont;

            this.ProductCornerType = item.ProductCornerType;

            UpdateTemplate();
        }


        private void UpdateTemplate()
        {
           

        }

        private MetroTileItem GetItemTemplate()
        {
            MetroTileItem template = new MetroTileItem();

            template.TileStyle.PaddingLeft = template.TileStyle.PaddingRight = -2;

            template.EnableMarkup = true;
            template.OptionGroup = "Dish";

            template.TileStyle.Font = this.itemPanel.Font;

            switch (this.ShowType)
            {
                case ProductShowType.全称和零售价:
                case ProductShowType.简称和零售价:
                    {
                        template.TileStyle.TextAlignment = DevComponents.DotNetBar.eStyleTextAlignment.Center;
                        template.TileStyle.TextLineAlignment = DevComponents.DotNetBar.eStyleTextAlignment.Near;
                        template.TitleTextAlignment = System.Drawing.ContentAlignment.BottomCenter;
                    }
                    break;
                case ProductShowType.品项全称:
                case ProductShowType.品项简称:
                    {
                        template.TileStyle.TextAlignment = DevComponents.DotNetBar.eStyleTextAlignment.Center;
                        template.TileStyle.TextLineAlignment = DevComponents.DotNetBar.eStyleTextAlignment.Center;
                    }
                    break;
            }
            template.TileStyle.TextColor = ColorTranslator.FromHtml(this.TextColor);
            template.TitleTextColor = ColorTranslator.FromHtml(this.TextColor);

            template.TileStyle.BackColor = ColorTranslator.FromHtml(this.BackColor1);
            template.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.BackColor1);

            template.TileStyle.BorderColor = Color.Transparent; //ColorTranslator.FromHtml(this.BackColor1);
            template.TileStyle.BorderColor2 = Color.Transparent;// ColorTranslator.FromHtml(this.BackColor1);
            template.TileStyle.BorderWidth = 1;

            template.TileStyle.CornerDiameter = 4;
            switch (this.ProductCornerType)
            {
                case CornerType.默认:
                    {
                        template.TileStyle.CornerType = eCornerType.Square;
                    }
                    break;
                case CornerType.圆角:
                    {
                        template.TileStyle.CornerType = eCornerType.Rounded;
                        template.TileStyle.BorderColor = ColorTranslator.FromHtml(this.BackColor1);
                        template.TileStyle.BorderColor2 = ColorTranslator.FromHtml(this.BackColor1);
                    }
                    break;
                case CornerType.棱角:
                    {
                        template.TileStyle.CornerType = eCornerType.Diagonal;                        
                    }
                    break;
            }
            
            
            

            //显示大小
            template.TileSize = new Size(this.ItemWidth , this.ItemHeight);

            template.MouseDown += OnItemMouseDown;
            
            return template;
        }

        private void OnItemMouseDown(object sender , MouseEventArgs e)
        {
            if(e.Button == MouseButtons.Left)
            {
                MetroTileItem item = (MetroTileItem)sender;

                var product = item.Tag as ProductExt;

                switch (product.Name)
                {
                    case Constant.PREV_PAGER:
                        {
                            int pageNumber = 1;
                            int.TryParse(product.Memo,out pageNumber);

                            this.PageNumber = pageNumber;

                            this.BindDataSource(this._dataSource);
                        }
                        break;
                    case Constant.NEXT_PAGER:
                        {
                            int pageNumber = 1;
                            int.TryParse(product.Memo , out pageNumber);

                            this.PageNumber = pageNumber;

                            this.BindDataSource(this._dataSource);
                        }
                        break;
                    default:
                        {
                            this.OnProductCheckedChanged(new ProductEventArgs(product));
                        }
                        break;
                }
                
            }
        }

        public event ProductEventHandler ProductCheckedChanged;
        protected virtual void OnProductCheckedChanged(ProductEventArgs e)
        {
            ProductCheckedChanged?.Invoke(this , e);
        }

        private SaleClear getSaleClear(string productId)
        {
            //判断是否存在沽清
            SaleClear saleClear = null;
            if (SaleClearUtils.Instance.Maps.ContainsKey(productId))
            {
                saleClear = SaleClearUtils.Instance.Maps[productId];
            }

            return saleClear;
        }

        public void BindDataSource(List<ProductExt> dataSource, KeyboardAction action = KeyboardAction.None)
        {
            this._dataSource = dataSource;

            this._action = action;

            this._index = 0;

            this._curr = null;

            LOGGER.Trace("单品绑定操作<{0},{1}>" , this._action.ToString() , this._dataSource.Count);

            if (this._dataSource == null)
            {
                this._dataSource = new List<ProductExt>();
            }

            //总数量
            this.TotalCount = dataSource.Count;

            //每页的显示数量
            this.PageSize = this.Rows * this.Columns;

            //清空历史数据
            this.itemPanel.Items.Clear();

            this.itemPanel.Font = this.GetSystemFont(this._fontSize);

            //复制新的数据源，进行分页运算
            var merge = ProductMerge.Merge(this.Rows , this.Columns , dataSource , false);

            var pager = ListPager(merge);

            ItemContainer ic = new ItemContainer();

            ic.MultiLine = true;
            ic.ItemSpacing = 0;
            ic.LayoutOrientation = eOrientation.Horizontal;

            foreach (ProductExt entity in pager)
            {
                //否存在沽清
                entity.SaleClear = getSaleClear(entity.Id); 

                MetroTileItem item = this.GetItemTemplate();

                item.Name = entity.Id;

                item.Checked = false;

                //绑定品类ID到Tag属性
                item.Tag = entity;

                switch (entity.Name)
                {
                    case Constant.PREV_PAGER:
                        {
                            item.Image = POSV.Properties.Resources.left;
                            item.ImageTextAlignment = System.Drawing.ContentAlignment.MiddleCenter;

                            item.TileStyle.BackColor = ColorTranslator.FromHtml(this.PagerColor1);
                            item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                            //item.TileStyle.BorderColor = Color.Transparent;
                            //item.TileStyle.BorderColor2 = Color.Transparent;
                        }
                        break;
                    case Constant.NEXT_PAGER:
                        {
                            item.Image = POSV.Properties.Resources.right;
                            item.ImageTextAlignment = System.Drawing.ContentAlignment.MiddleCenter;

                            item.TileStyle.BackColor = ColorTranslator.FromHtml(this.PagerColor1);
                            item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.PagerColor2);
                            //item.TileStyle.BorderColor = Color.Transparent;
                            //item.TileStyle.BorderColor2 = Color.Transparent;
                        }
                        break;
                    default:
                        {
                            switch (this.ShowType)
                            {
                                case ProductShowType.全称和零售价:
                                case ProductShowType.简称和零售价:
                                    {
                                        //绑定品类售价
                                        item.TitleText = entity.Price + "";
                                        //绑定品类名称
                                        item.Text = entity.Name;
                                    }
                                    break;
                                case ProductShowType.品项全称:
                                case ProductShowType.品项简称:
                                    {
                                        //绑定品类名称到Text属性
                                        item.Text = entity.Name;
                                    }
                                    break;
                            }
                            //促销
                            UpdatePromotion(item, entity);

                            //沽清
                            UpdateSaleClear(item , entity);
                        }
                        break;
                }
                
                
                ic.SubItems.Add(item);
            }

            this.itemPanel.Items.Add(ic);
            this.itemPanel.Invalidate();

        }

        public void UpdatePromotion(MetroTileItem item, ProductExt entity)
        {
            try
            {
                var res = PromotionEngine.Instance.GetSpecPromotionPrice(entity);
                if (res.Item1)
                {
                    if (!string.IsNullOrEmpty(item.TitleText))
                    {
                        item.TitleText = StringUtils.FormatDataNoDigit(res.Item2);
                    }

                    item.NotificationMarkColor = Color.DarkRed;
                    item.NotificationMarkText = "促";
                    item.NotificationMarkSize = 20;
                    item.NotificationMarkPosition = eNotificationMarkPosition.BottomRight;
                }
                else
                {
                    item.TitleTextColor = ColorTranslator.FromHtml(this.TextColor);

                    item.NotificationMarkText = string.Empty;
                    item.NotificationMarkSize = 0;
                    item.NotificationMarkPosition = eNotificationMarkPosition.BottomRight;
                }
            }
            catch(Exception ex)
            {
                LOGGER.Error(ex, "加载商品块:获取商品促销信息异常！");
            }
        }

        public void UpdateSaleClear(MetroTileItem item,ProductExt entity)
        {
            if (entity.SaleClear != null)
            {
                if (entity.SaleClear.StopFlag == 0 && !entity.SaleClear.Frozen)
                {
                    item.TileStyle.Font = this.GetSystemFont(this.SaleClearFont);

                    if (entity.SaleClear.Quantity > 0)
                    {
                        item.TileStyle.TextColor = ColorTranslator.FromHtml(this.SaleClearTextColor);
                        item.TitleTextColor = ColorTranslator.FromHtml(this.SaleClearTextColor);

                        item.TileStyle.BackColor = ColorTranslator.FromHtml(this.SaleClearColor);
                        item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.SaleClearColor);
                        item.TileStyle.BorderColor = Color.Transparent;
                        item.TileStyle.BorderColor2 = Color.Transparent;

                        item.NotificationMarkColor = ColorTranslator.FromHtml(this.SaleClearNotifyColor);
                        item.NotificationMarkText = entity.SaleClear.Quantity.ToString();
                        item.NotificationMarkSize = 20;
                    }
                    else
                    {
                        item.TileStyle.TextColor = ColorTranslator.FromHtml(this.SaleClearTextColor);
                        item.TitleTextColor = ColorTranslator.FromHtml(this.SaleClearTextColor);

                        item.TileStyle.BackColor = ColorTranslator.FromHtml(this.SaleStopColor);
                        item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.SaleStopColor);
                        item.TileStyle.BorderColor = Color.Transparent;
                        item.TileStyle.BorderColor2 = Color.Transparent;

                        item.NotificationMarkColor = ColorTranslator.FromHtml(this.SaleClearNotifyColor);
                        item.NotificationMarkText = "停";
                        item.NotificationMarkSize = 20;
                    }
                }
                else
                {
                    item.TileStyle.TextColor = ColorTranslator.FromHtml(this.TextColor);
                    item.TitleTextColor = ColorTranslator.FromHtml(this.TextColor);

                    item.TileStyle.BackColor = ColorTranslator.FromHtml(this.BackColor1);
                    item.TileStyle.BackColor2 = ColorTranslator.FromHtml(this.BackColor2);
                    item.TileStyle.BorderColor = Color.Transparent;
                    item.TileStyle.BorderColor2 = Color.Transparent;
                    
                    item.NotificationMarkText = string.Empty;
                    item.NotificationMarkSize = 0;
                }

                item.Refresh();
            }
        }
        /// <summary>
        /// 分页List数据
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public List<ProductExt> ListPager(List<ProductExt> data)
        {
            var result = new List<ProductExt>();

            result.AddRange(data.Skip((this.PageNumber - 1) * this.PageSize).Take(this.PageSize));

            return result;
        }

        private ProductShowType _showType = ProductShowType.全称和零售价;
        public ProductShowType ShowType
        {
            get { return this._showType; }
            set
            {
                this._showType = value;
            }
        }

        private int _itemHeight = 70;
        /// <summary>
        ///品类显示的高度
        /// </summary>
        public int ItemHeight
        {
            get { return _itemHeight; }
            set
            {
                _itemHeight = (value <= 0 ? 70 : value);
            }
        }

        private int _itemWidth = 90;
        /// <summary>
        /// 品类的宽度
        /// </summary>
        public int ItemWidth
        {
            get
            {
                return this._itemWidth;
            }
            set
            {
                if (value <= 0 || ((value * this._columns) > this.ContentWidth))
                {
                    this._itemWidth = this.ContentWidth / this._columns;
                }
                else
                {
                    this._itemWidth = value;
                    this._columns = this.ContentWidth / this._itemWidth;
                }
            }
        }

        private SystemFont _fontSize = SystemFont.默认;
        /// <summary>
        /// 字体大小
        /// </summary>
        public SystemFont FontSize
        {
            get { return this._fontSize; }
            set { this._fontSize = value; }
        }

        private string _backColor1 = ColorTranslator.ToHtml(Color.DimGray);
        /// <summary>
        /// 品类显示颜色
        /// </summary>
        public string BackColor1
        {
            get { return this._backColor1; }
            set { this._backColor1 = value; }
        }


        private string _backColor2 = ColorTranslator.ToHtml(Color.DimGray);
        /// <summary>
        /// 品类显示颜色
        /// </summary>
        public string BackColor2
        {
            get { return this._backColor2; }
            set { this._backColor2 = value; }
        }

        private string _textColor = ColorTranslator.ToHtml(Color.White);
        /// <summary>
        /// 品类显示颜色
        /// </summary>
        public string TextColor
        {
            get { return this._textColor; }
            set { this._textColor = value; }
        }

        /// <summary>
        /// 有效区域的宽度，不包含左右分页宽度
        /// </summary>
        public int ContentWidth => this.Width /*- this.PagerWidth - (this.Columns + 1)*/;

        public int ContentHeight => this.Height;
        
        private string _pagerColor1 = ColorTranslator.ToHtml(Color.DimGray);
        /// <summary>
        /// 分页按钮的颜色
        /// </summary>
        public string PagerColor1
        {
            get { return this._pagerColor1; }
            set { this._pagerColor1 = value; }
        }

        private string _pagerColor2 = ColorTranslator.ToHtml(Color.DimGray);
        /// <summary>
        /// 分页按钮的颜色
        /// </summary>
        public string PagerColor2
        {
            get { return this._pagerColor2; }
            set { this._pagerColor2 = value; }
        }

        private bool _autoPager = true;
        /// <summary>
        /// 是否自动隐藏分页
        /// </summary>
        public bool AutoPager
        {
            get
            {
                return this._autoPager;
            }
            set
            {
                this._autoPager = value;
            }
        }

        /// <summary>
        /// 每页的大小
        /// </summary>
        public int PageSize { get; private set; }

        /// <summary>
        /// 总页数
        /// </summary>
        public int PageCount => this.PageSize <= 0 ? 0 : ((this.TotalCount + this.PageSize - 1) / this.PageSize);

        /// <summary>
        /// 当前页码
        /// </summary>
        public int PageNumber { get; set; }

        /// <summary>
        /// 总数量
        /// </summary>
        public int TotalCount { get; private set; }


        private int _columns = 1;
        /// <summary>
        /// 每一行显示的数量
        /// </summary>
        public int Columns
        {
            get
            {
                return _columns;
            }
            set
            {
                _columns = (value <= 0 ? 1 : value);
            }
        }

        /// <summary>
        ///品类默认行数
        /// </summary>
        public int Rows => this.Height / this.ItemHeight;
        

        //是否有上一页
        public bool HasPreviousPage
        {
            get { return PageNumber > 1; }
        }

        //是否有下一页
        public bool HasNextPage
        {
            get { return PageNumber < this.PageCount; }
        }


        /// <summary>
        /// 沽清品类显示颜色
        /// </summary>
        public string SaleClearColor { get; set; }

        /// <summary>
        /// 沽清品类提醒颜色
        /// </summary>
        public string SaleClearNotifyColor { get; set; }


        /// <summary>
        /// 沽清字体显示颜色
        /// </summary>
        public string SaleClearTextColor { get; set; }

        /// <summary>
        /// 沽清的字体大小
        /// </summary>
        public SystemFont SaleClearFont { get; set; }

        /// <summary>
        /// 沽清停售显示颜色
        /// </summary>
        public string SaleStopColor { get; set; }

        /// <summary>
        /// 选中品项显示颜色
        /// </summary>
        public string SelBackColor { get; set; }

        /// <summary>
        /// 选中字体显示颜色
        /// </summary>
        public string SelTextColor { get; set; }

        /// <summary>
        /// 选中品项的字体
        /// </summary>
        public SystemFont SelProductFont { get; set; }


        /// <summary>
        /// 品项的显示样式
        /// </summary>
        public CornerType ProductCornerType { get; set; } = CornerType.圆角;

    }

    public delegate void ProductEventHandler(object sender , ProductEventArgs e);

    public class ProductEventArgs : EventArgs
    {
        public ProductExt Product;
        public ProductEventArgs(ProductExt data)
        {
            this.Product = data;
        }
    }
    
}