using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ListView_CheckBox
{

    public partial class Form1 : Form
    {
        private int m_SelectedItemIndex = -1;
        private ItemCheckEventHandler m_ItemCheckhandler;
        private object m_ListviewLock = new object();

        public Form1()
        {            
            InitializeComponent();
            m_ItemCheckhandler = new ItemCheckEventHandler(this.listView1_ItemChecked);
        }

        private void listView1_ItemChecked(object sender, ItemCheckEventArgs e)
        {
            SetSelectedItem(e.Index);
            Cursor.Current = Cursors.WaitCursor;
            string whoami = System.Reflection.MethodBase.GetCurrentMethod().Name;
            try
            {
                HandleItemCheckedEvent(false);
                ListViewItemEx item = GetSelectedItem();
                if (e.NewValue == CheckState.Unchecked)
                {
                    MoveToBottom(e.Index);
                    SetSelectedItem(item.Index);
                }
                else if (e.NewValue == CheckState.Checked)
                {
                    int index = 0;                  
                    MoveToTop(e.Index, index);
                    SetSelectedItem(item.Index);
                }
            }
            catch (Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }
            finally
            {
                HandleItemCheckedEvent(true);
                Cursor.Current = Cursors.Default;
            }          
        }
        
        public int MoveToBottom(int itemIndex)
        {
            lock (m_ListviewLock)
            {
                int bottomIndex = listView1.Items.Count - 1;
                if (itemIndex == bottomIndex)
                {
                    return bottomIndex;
                }
                // move the item
                listView1.BeginUpdate();
                ListViewItem cachedItem = listView1.Items[itemIndex];
                listView1.Items.RemoveAt(itemIndex);
                listView1.Items.Insert(bottomIndex, cachedItem);
                RefreshItems(0);
                listView1.EndUpdate();
                return bottomIndex;
            }
        }

        public int MoveToTop(int itemIndex, int newIndex)
        {
            if (itemIndex == newIndex)
            {
                return newIndex;
            }
            lock (m_ListviewLock)
            {
                // move the item
                listView1.BeginUpdate();
                ListViewItem cachedItem = listView1.Items[itemIndex];
                listView1.Items.RemoveAt(itemIndex);
                listView1.Items.Insert(newIndex, cachedItem);
                RefreshItems(0);
                listView1.EndUpdate();
                return newIndex;
            }
        }
        public void SetSelectedListItem(int index)
        {            
            listView1.Items[index].Selected = true;            
        }
        public int SetSelectedItem(int selectedItemIndex)
        {
            // set the selected item in the ListView           
            if (selectedItemIndex >= 0 && selectedItemIndex < listView1.Items.Count)
            {
                SetSelectedListItem(selectedItemIndex);                
                listView1.EnsureVisible(selectedItemIndex);
                m_SelectedItemIndex = selectedItemIndex;
            }
           
            return m_SelectedItemIndex;
        }
        public ListViewItemEx GetSelectedItem()
        {
            ListViewItemEx item = null;
            ListView.SelectedListViewItemCollection items = listView1.SelectedItems;
            int count = items.Count;
            if (count > 0)
            {
                item = items[0] as ListViewItemEx;
            }

            return item;
        }
        protected internal void HandleItemCheckedEvent(bool handleEvent)
        {
            //ItemCheckEventHandler handler = new ItemCheckEventHandler(this.listView1_ItemChecked);
            if (handleEvent)
            {
                listView1.ItemCheck += m_ItemCheckhandler;
            }
            else
            {
                listView1.ItemCheck -= m_ItemCheckhandler;
            }            
        }

        private void RefreshItems(int index)
        {
            for (int i = index; i < listView1.Items.Count; i++)
            {
                // make sure the ListViewItem is something that can refresh
                ListViewItemEx item = listView1.Items[i] as ListViewItemEx;
                if (item != null)
                {
                    item.Refresh();
                }
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = 0; i < 10; i++)
            {
                ListViewItemEx itemEx = new ListViewItemEx(i.ToString());
                listView1.Items.Add(itemEx);
            }
            for (int i = 0; i < listView1.Items.Count; i++)
            {
                // make sure the ListViewItem is something that can refresh
                ListViewItemEx item = listView1.Items[i] as ListViewItemEx;
                if (item != null)
                {
                    item.Refresh();
                }
            }
            HandleItemCheckedEvent(true);
            SetSelectedItem(0);
        }


        public class ListViewItemEx : ListViewItem
        {
            private string m_ItemExObject; 

            #region CTOR
            public ListViewItemEx(string itemEx)
                : base()
            {
                m_ItemExObject = itemEx;
            }

            #endregion
                                                       
            public virtual void Refresh()
            {
                String whoami = System.Reflection.MethodBase.GetCurrentMethod().Name;
                if (ListView == null)
                {                   
                    return;
                }

                // make sure the item and ListView columns are in sync
                int columnCount = ListView.Columns.Count;
                if (columnCount != SubItems.Count - 1)
                {
                    SubItems.Clear();
                    for (int i = 0; i < columnCount; i++)
                    {
                        SubItems.Add(String.Empty);
                    }
                }
                               
                // now setup each item column
                for (int i = 1; i < ListView.Columns.Count; i++)
                {
                    ColumnHeader columnHeader = (ColumnHeader)ListView.Columns[i];
                    ListViewItem.ListViewSubItem subitem = this.SubItems[i];
                    subitem.Text =  m_ItemExObject + i.ToString();
                }
            }          
        }
    }
}