using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Collections;

namespace ServerExplorer.Controls
{
    [DefaultProperty("Items")]
    [DefaultEvent("SelectedIndexChanged")]
    [ComVisible(true)]
    [ClassInterface(ClassInterfaceType.AutoDispatch)]
    [Docking(DockingBehavior.Ask)]
    public class CustomListView : ListView
    {
        #region Declarations

        ListViewItemComparer itemComparer = new ListViewItemComparer();

        #endregion

        #region Properties

        private bool allowSorting = false;
        public bool AllowSorting
        {
            get { return allowSorting; }
            set { allowSorting = value; }
        }

        #endregion

        #region Control life cicle

        public CustomListView()
        {
            ColumnClick += CustomListView_ColumnClick;
        }

        #endregion

        #region Events

        private void CustomListView_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            if (!allowSorting) { return; }
            itemComparer.SetColumn(e.Column);
            ListViewItemSorter = itemComparer;
            Sort();
        }

        #endregion
    }

    #region ListViewItemComparer

    internal class ListViewItemComparer : IComparer
    {
        private int _col;
        private bool _ascending;

        public void SetColumn(int col)
        {
            _col = col;
            _ascending = _col != col || !_ascending;
        }

        public int Compare(object x, object y)
        {
            var itemA = (ListViewItem) x;
            var itemB = (ListViewItem) y;

            if (itemA.SubItems.Count <= _col || itemB.SubItems.Count <= _col)
            {
                return -1;
            }
            return _ascending
                       ? String.CompareOrdinal(itemA.SubItems[_col].Text, itemB.SubItems[_col].Text)
                       : String.CompareOrdinal(itemB.SubItems[_col].Text, itemA.SubItems[_col].Text);
        }
    }

    #endregion
}