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130 lines
No EOL
4.3 KiB
C#
130 lines
No EOL
4.3 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2016 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System.Collections;
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using System.Windows.Forms;
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namespace ShareX.HelpersLib
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{
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/// <summary>
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/// This class is an implementation of the 'IComparer' interface.
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/// </summary>
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public class ListViewColumnSorter : IComparer
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{
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/// <summary>
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/// Specifies the column to be sorted
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/// </summary>
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private int ColumnToSort;
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/// <summary>
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/// Specifies the order in which to sort (i.e. 'Ascending').
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/// </summary>
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private SortOrder OrderOfSort;
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/// <summary>
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/// Case insensitive comparer object
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/// </summary>
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private CaseInsensitiveComparer ObjectCompare;
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/// <summary>
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/// Class constructor. Initializes various elements
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/// </summary>
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public ListViewColumnSorter()
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{
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// Initialize the column to '0'
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ColumnToSort = 0;
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// Initialize the sort order to 'none'
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OrderOfSort = SortOrder.None;
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// Initialize the CaseInsensitiveComparer object
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ObjectCompare = new CaseInsensitiveComparer();
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}
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/// <summary>
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/// This method is inherited from the IComparer interface. It compares the two objects passed using a case insensitive comparison.
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/// </summary>
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/// <param name="x">First object to be compared</param>
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/// <param name="y">Second object to be compared</param>
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/// <returns>The result of the comparison. "0" if equal, negative if 'x' is less than 'y' and positive if 'x' is greater than 'y'</returns>
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public int Compare(object x, object y)
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{
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int compareResult;
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ListViewItem listviewX, listviewY;
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// Cast the objects to be compared to ListViewItem objects
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listviewX = (ListViewItem)x;
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listviewY = (ListViewItem)y;
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// Compare the two items
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compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);
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// Calculate correct return value based on object comparison
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if (OrderOfSort == SortOrder.Ascending)
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{
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// Ascending sort is selected, return normal result of compare operation
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return compareResult;
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}
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else if (OrderOfSort == SortOrder.Descending)
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{
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// Descending sort is selected, return negative result of compare operation
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return -compareResult;
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}
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else
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{
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// Return '0' to indicate they are equal
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return 0;
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}
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}
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/// <summary>
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/// Gets or sets the number of the column to which to apply the sorting operation (Defaults to '0').
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/// </summary>
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public int SortColumn
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{
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set
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{
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ColumnToSort = value;
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}
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get
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{
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return ColumnToSort;
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}
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}
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/// <summary>
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/// Gets or sets the order of sorting to apply (for example, 'Ascending' or 'Descending').
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/// </summary>
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public SortOrder Order
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{
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set
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{
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OrderOfSort = value;
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}
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get
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{
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return OrderOfSort;
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}
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}
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}
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} |