using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data;

namespace WCS_Client.UC
{
    public class LC_DropChkList : DevComponents.DotNetBar.Controls.TextBoxDropDown
    {
        public LC_DropChkList()
        {
            ChkList.CheckOnClick = true;
            ChkList.ItemCheck += new ItemCheckEventHandler(ChkList_ItemCheck);
            this.BackgroundStyle.Class = "TextBoxBorder";
            this.BackgroundStyle.CornerType = DevComponents.DotNetBar.eCornerType.Square;
            this.Style = DevComponents.DotNetBar.eDotNetBarStyle.StyleManagerControlled;
            this.BackColor = System.Drawing.SystemColors.Control;
            this.Margin = new System.Windows.Forms.Padding(0, 0, 0, 0);
            this.ReadOnly = true;
            this.ButtonCustom.Visible = false;
            this.ButtonCustom2.Visible = false;
            this.ButtonDropDown.Visible = true;
            this.DropDownControl = ChkList;
            this.ButtonDropDown.Shortcut = DevComponents.DotNetBar.eShortcut.Ins;
            this.ButtonDropDownClick += new System.ComponentModel.CancelEventHandler(Item_ButtonDropDownClick);
            this.ButtonClear.Visible = true;
            this.ButtonClear.Shortcut = DevComponents.DotNetBar.eShortcut.Del;
            this.ButtonClearClick += new System.ComponentModel.CancelEventHandler(Item_ButtonClearClick);
            this.PopupClose += new EventHandler(Item_PopupClose);
        }

        private CheckedListBox ChkList = new CheckedListBox();

        public delegate void DataChangeHandler();

        public DataChangeHandler DataChangeEvent;
        /// <summary>
        /// 控件数据改变
        /// </summary>
        private void Item_PopupClose(object sender, EventArgs e)
        {
            if (DataChangeEvent != null)
            {
                DataChangeEvent();
            }
        }

        private void Item_ButtonDropDownClick(object sender, System.ComponentModel.CancelEventArgs e)
        {
            this.ChkList.Width = this.Width - this.Margin.Left - this.Margin.Right;
            this.ShowDropDown();
            ChkList.Focus();
        }
        private void ChkList_ItemCheck(object sender, ItemCheckEventArgs e)
        {
            int count = ChkList.Items.Count;
            string s = "";
            bool ctag = true;
            for (int i = 0; i < count; i++)
            {
                if (i == e.Index)
                {
                    if (e.NewValue == CheckState.Checked)
                    {
                        DataRowView drv = ChkList.Items[i] as DataRowView;
                        if (drv != null)
                        {
                            if (ctag)
                            {
                                ctag = false;
                                s = drv[ChkList.DisplayMember].ToString();
                                continue;
                            }
                            s = s + "," + drv[ChkList.DisplayMember].ToString();

                        }
                    }


                }
                else
                {
                    if (ChkList.GetItemCheckState(i) == CheckState.Checked)
                    {
                        DataRowView drv = ChkList.Items[i] as DataRowView;
                        if (drv != null)
                        {
                            if (ctag)
                            {
                                ctag = false;
                                s = drv[ChkList.DisplayMember].ToString();
                                continue;
                            }
                            s = s + "," + drv[ChkList.DisplayMember].ToString();

                        }
                    }
                }
            }
            this.Text = s;
        }


        public List<string> GetValue()
        {
            List<string> DataItems = new List<string>();

            foreach (DataRowView Item in ChkList.CheckedItems)
            {
                DataItems.Add(Item[ChkList.ValueMember].ToString());
            }
            return DataItems;
        }

        public void SetValue(List<string> DataItems)
        {
            Item_ButtonClearClick(null, null);
            if (DataItems != null && DataItems.Count > 0)
            {
                int count = ChkList.Items.Count;
                for (int i = 0; i < count; i++)
                {
                    DataRowView drv = ChkList.Items[i] as DataRowView;
                    if (drv != null && DataItems.Contains(drv[ChkList.ValueMember].ToString()))
                    {
                        ChkList.SetItemCheckState(i, CheckState.Checked);
                    }
                }
            }
        }

        /// <summary>
        /// 刷新数据
        /// </summary>
        public void RefreshData(DataTable dt, string KeyField, string DisplayField)
        {
            List<string> Itemlist = GetValue();
            ChkList.DataSource = dt;
            ChkList.DisplayMember = DisplayField;
            ChkList.ValueMember = KeyField;
            SetValue(Itemlist);
        }



        /// <summary>
        /// 是否控件输入值是否为空
        /// </summary>
        /// <returns>true,空值;false,已经输入值</returns>
        public bool IsValueNull()
        {
            return (ChkList.CheckedItems.Count == 0);
        }

        private void Item_ButtonClearClick(object sender, System.ComponentModel.CancelEventArgs e)
        {
            this.Text = "";
            foreach (int item in ChkList.CheckedIndices)
            {
                ChkList.SetItemCheckState(item, CheckState.Unchecked);
            }
        }
        public void ClearValue()
        {
            Item_ButtonClearClick(null, null);
        }
    }
}