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 UAS_MES.DataOperate;

namespace UAS_MES.CustomControl.TextBoxWithIcon
{
    public partial class BlurSearch : UserControl
    {
        DataHelper dh = new DataHelper();

        string TableName1;

        string Field1;

        int ItemSelectIndex = -1;

        public override string Text
        {
            get
            {
                return EnterTextBox.Text;
            }

            set
            {
                EnterTextBox.Text = value;
            }
        }

        public BlurSearch()
        {
            InitializeComponent();
        }

        public string TableName
        {
            get
            {
                return TableName1;
            }

            set
            {
                TableName1 = value;
            }
        }

        public string Field
        {
            get
            {
                return Field1;
            }

            set
            {
                Field1 = value;
            }
        }

        private void TextBox_Leave(object sender, EventArgs e)
        {
            Height = EnterTextBox.Height;
            ListBox.Visible = false;
        }

        private void BlurSearch_Load(object sender, EventArgs e)
        {
            Height = EnterTextBox.Height;
            ListBox.Visible = false;
        }

        private void EnterTextBox_TextChanged(object sender, EventArgs e)
        {
            if (EnterTextBox.Text != "")
            {
                DataTable dt = dh.getFieldsDatasByCondition(TableName1, new string[] { Field1 }, Field1 + " like '%" + EnterTextBox.Text + "%' and rownum<=10");
                if (dt.Rows.Count > 0)
                {
                    ListBox.Items.Clear();
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        ListBox.Items.Add(dt.Rows[i][Field1]);
                    }
                    //每次数据查询之后将索引重置
                    ItemSelectIndex = -1;
                    ListBox.Height = ListBox.ItemHeight * dt.Rows.Count;
                    ListBox.Visible = true;
                    Height = ListBox.Height + EnterTextBox.Height;
                }
            }
            else
            {
                ListBox.Visible = false;
                Height = EnterTextBox.Height;
            }
        }

        private void ListBox_Click(object sender, EventArgs e)
        {
            EnterTextBox.Text = ListBox.SelectedItem.ToString();
            ListBox.Visible = false;
            Height = EnterTextBox.Height;
        }

        private void EnterTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (ListBox.Items.Count > 0)
            {
                if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Up)
                {
                    switch (e.KeyCode)
                    {
                        case Keys.Down:
                            if (ListBox.Items.Count > ItemSelectIndex + 1)
                                ItemSelectIndex = ItemSelectIndex + 1;
                            break;
                        case Keys.Up:
                            if (ItemSelectIndex - 1 >= 0)
                                ItemSelectIndex = ItemSelectIndex - 1;
                            break;
                        default:
                            break;
                    }
                    ListBox.SelectedIndex = ItemSelectIndex;
                }
                if (e.KeyCode == Keys.Enter)
                {
                    try
                    {
                        EnterTextBox.Text = ListBox.SelectedItem.ToString();
                        ListBox.Visible = false;
                        Height = EnterTextBox.Height;
                    }
                    catch (Exception)
                    {
                    }
                }
            }
        }
    }
}