38 строки
910 B
C#
38 строки
910 B
C#
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows.Media;
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using System.Windows;
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using System.Collections;
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using System.Windows.Input;
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namespace ICSharpCode.TreeView
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{
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static class ExtensionMethods
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{
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public static T FindAncestor<T>(this DependencyObject d) where T : class
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{
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return AncestorsAndSelf(d).OfType<T>().FirstOrDefault();
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}
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public static IEnumerable<DependencyObject> AncestorsAndSelf(this DependencyObject d)
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{
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while (d != null) {
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yield return d;
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d = VisualTreeHelper.GetParent(d);
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}
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}
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public static void AddOnce(this IList list, object item)
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{
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if (!list.Contains(item)) {
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list.Add(item);
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}
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}
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}
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}
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