Sunji-posv-net/pos/POSV.Template/Component/PromotionNotifyPanel.cs

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.ShoppingCart;

namespace POSV.Component
{
    [ToolboxItem(false)]
    public partial class PromotionNotifyPanel : AbstractNotifyPanelEx
    {
        public PromotionNotifyPanel()
        {
            InitializeComponent();

            //订购优惠变更通知事件
            //MsgEvent.RemoveListener(Constant.ORDERPROMOTION_CHANGED_NOTIFY, this.OrderPromotionChangedEventNotify);
            MsgEvent.Receive(Constant.ORDERPROMOTION_CHANGED_NOTIFY, this.OrderPromotionChangedEventNotify);
        }

        protected void OrderPromotionChangedEventNotify(object sender, MsgEventArgs args)
        {
            if(args.Data != null)
            {
                if(args.Data is Tuple<PromotionEntity, bool>)
                {
                    var data = args.Data as Tuple<PromotionEntity, bool>;
                    foreach(Control con in this.Controls)
                    {
                        if (con is PromotionItemControl)
                        {
                            var tempCon = con as PromotionItemControl;
                            var prom = tempCon.Tag as PromotionEntity;
                            if(prom != null && prom.PromotionId == data.Item1.PromotionId)
                            {
                                tempCon.RefreshView(prom, data.Item2);
                            }
                        }
                    }
                }
            }
        }

        public void RefreshProms(List<PromotionEntity> proms)
        {
            //this.Controls.Clear();
            proms = proms.OrderByDescending(x => x.DiscountAmount).ToList();
            //减少闪烁的处理
            var addNum = proms.Count - this.Controls.Count;
            while(addNum > 0)
            {
                PromotionItemControl item = new PromotionItemControl();
                item.Dock = DockStyle.Top;
                item.ButtonClick += (o, args) =>
                {
                    this.OnButtonClick(args);
                };
                this.Controls.Add(item);
                addNum--;
            }

            while(addNum < 0)
            {
                this.Controls.RemoveAt(0);
                addNum++;
            }

            //控件排序
            for(int i =0; i < proms.Count; i++)
            {
                var prom = proms[i];
                var con = this.Controls[(this.Controls.Count -1 - i)];
                if(con is PromotionItemControl)
                {
                    var tempCon = con as PromotionItemControl;
                    tempCon.RefreshView(prom, false);
                    tempCon.Tag = prom;
                }
            }
            this.Invalidate();
        }
    }
}