103 lines
3.1 KiB
C#
103 lines
3.1 KiB
C#
// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
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//
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// Authors:
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// Chris Toshok (toshok@ximian.com)
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// Brian O'Keefe (zer0keefie@gmail.com)
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//
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using System;
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namespace System.ComponentModel {
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public struct SortDescription
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{
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private string sortPropertyName;
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private ListSortDirection sortDirection;
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private bool isSealed;
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public SortDescription (string propertyName, ListSortDirection direction)
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{
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if(direction != ListSortDirection.Ascending && direction != ListSortDirection.Descending)
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throw new InvalidEnumArgumentException("direction", (int)direction, typeof(ListSortDirection));
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sortPropertyName = propertyName;
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sortDirection = direction;
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isSealed = false;
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}
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public static bool operator!= (SortDescription sd1, SortDescription sd2)
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{
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return !(sd1 == sd2);
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}
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public static bool operator== (SortDescription sd1, SortDescription sd2)
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{
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return sd1.sortDirection == sd2.sortDirection && sd1.sortPropertyName == sd2.sortPropertyName;
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}
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public ListSortDirection Direction {
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get { return sortDirection; }
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set {
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if(isSealed)
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throw new InvalidOperationException("Cannot change Direction once the SortDescription has been sealed.");
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if(value != ListSortDirection.Ascending && value != ListSortDirection.Descending)
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throw new InvalidEnumArgumentException("direction", (int)value, typeof(ListSortDirection));
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sortDirection = value;
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}
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}
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public bool IsSealed {
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get { return isSealed; }
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}
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public string PropertyName {
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get { return sortPropertyName; }
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set {
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if(isSealed)
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throw new InvalidOperationException("Cannot change Direction once the SortDescription has been sealed.");
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sortPropertyName = value;
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}
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}
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public override bool Equals (object obj)
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{
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if (!(obj is SortDescription))
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return false;
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return ((SortDescription)obj) == this;
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}
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public override int GetHashCode ()
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{
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if(sortPropertyName == null)
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return sortDirection.GetHashCode ();
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return sortPropertyName.GetHashCode () ^ sortDirection.GetHashCode ();
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}
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internal void Seal()
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{
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isSealed = true;
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}
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}
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} |