/* 
 * Copyright (c) 2009 Craig Sutherland
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

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

namespace FastForward.WinCore
{
    /// <summary>
    /// Sort by a column of strings in a list view.
    /// </summary>
    public class ListViewStringSorter
        : IComparer
    {
        #region Private fields
        private int column;
        private ListView list;
        #endregion

        #region Constructors
        /// <summary>
        /// Initialise a new <see cref="ListViewStringSorter"/>.
        /// </summary>
        /// <param name="column"></param>
        /// <param name="list"></param>
        public ListViewStringSorter(int column, ListView list)
        {
            this.column = column;
            this.list = list;
        }
        #endregion

        #region Public methods
        #region Compare()
        /// <summary>
        /// Compare two rows.
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        public int Compare(object x, object y)
        {
            var xItem = x as ListViewItem;
            var yItem = y as ListViewItem;

            var xVal = xItem.SubItems[column].Text;
            var yVal = yItem.SubItems[column].Text;

            var result = string.Compare(xVal, yVal);
            if (list.Sorting == SortOrder.Descending) result = -result;
            return result;
        }
        #endregion
        #endregion
    }
}