0bb50d9254
git-svn-id: file:///srv/devel/repo-conversion/nusu@297 d2e56fa2-650e-0410-a79f-9358c0239efd
58 lines
1.9 KiB
C#
58 lines
1.9 KiB
C#
#region CPL License
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/*
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Nuclex Framework
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Copyright (C) 2002-2014 Nuclex Development Labs
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This library is free software; you can redistribute it and/or
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modify it under the terms of the IBM Common Public License as
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published by the IBM Corporation; either version 1.0 of the
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License, or (at your option) any later version.
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This library 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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IBM Common Public License for more details.
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You should have received a copy of the IBM Common Public
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License along with this library
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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namespace Nuclex.Support.Collections {
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/// <summary>Base class for objects that can be parented to an owner</summary>
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/// <typeparam name="TParent">Type of the parent object</typeparam>
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public class Parentable<TParent> {
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/// <summary>The parent object that owns this instance</summary>
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protected TParent Parent {
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get { return this.parent; }
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}
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/// <summary>Invoked whenever the instance's owner changes</summary>
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/// <remarks>
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/// When items are parented for the first time, the oldParent argument will
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/// be null. Also, if the element is removed from the collection, the
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/// current parent will be null.
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/// </remarks>
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/// <param name="oldParent">Previous owner of the instance</param>
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protected virtual void OnParentChanged(TParent oldParent) { }
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/// <summary>Assigns a new parent to this instance</summary>
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internal void SetParent(TParent parent) {
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TParent oldParent = this.parent;
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this.parent = parent;
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OnParentChanged(oldParent);
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}
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/// <summary>Current parent of this object</summary>
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private TParent parent;
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}
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} // namespace Nuclex.Support.Collections
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