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

    class ListViewItemComparer : IComparer
    {
        private int col;
        private bool ascending;

        public void SetColumn(int col)
        {
            if (this.col == col)
            {
                ascending = ascending ? false : true;
            }
            else
            {
                this.col = col;
                ascending = true;
            }
        }

        public int Compare(object x, object y)
        {
            int returnVal = -1;
            if (ascending)
            {
                returnVal = String.Compare(
                    ((ListViewItem)x).SubItems[col].Text,
                    ((ListViewItem)y).SubItems[col].Text);
            }
            else
            {
                returnVal = String.Compare(
                    ((ListViewItem)y).SubItems[col].Text,
                    ((ListViewItem)x).SubItems[col].Text);
            }
            return returnVal;
        }
    }
    #endregion
}