TriggerCollection.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / TriggerCollection.cs / 1 / TriggerCollection.cs
                        

                        
                            /****************************************************************************\ 
*
* File: TriggerCollection.cs
*
* A collection of TriggerBase-derived classes. See use in Style.cs and other 
* places.
* 
* Copyright (C) by Microsoft Corporation.  All rights reserved. 
*
\***************************************************************************/ 

using System.Diagnostics;
using System.Collections.Generic;
using System.Collections.ObjectModel; // Collection 
using MS.Internal;
 
namespace System.Windows 
{
    ///  
    ///     A set of TriggerBase's
    /// 
    [Localizability(LocalizationCategory.None, Readability=Readability.Unreadable)]
    public sealed class TriggerCollection : Collection 
    {
        #region Constructors 
 
        internal TriggerCollection() : this(null)
        { 
        }

        internal TriggerCollection(FrameworkElement owner) : base()
        { 
            _sealed = false;
            _owner = owner; 
        } 

        #endregion Constructors 

        #region ProtectedMethods

        ///  
        ///     ClearItems override
        ///  
        protected override void ClearItems() 
        {
            CheckSealed(); 
            OnClear();
            base.ClearItems();
        }
 
        /// 
        ///     InsertItem override 
        ///  
        protected override void InsertItem(int index, TriggerBase item)
        { 
            CheckSealed();
            TriggerBaseValidation(item);
            OnAdd(item);
            base.InsertItem(index, item); 
        }
 
        ///  
        ///     RemoveItem override
        ///  
        protected override void RemoveItem(int index)
        {
            CheckSealed();
            TriggerBase triggerBase = this[index]; 
            OnRemove(triggerBase);
            base.RemoveItem(index); 
        } 

        ///  
        ///     SetItem override
        /// 
        protected override void SetItem(int index, TriggerBase item)
        { 
            CheckSealed();
            TriggerBaseValidation(item); 
            OnAdd(item); 
            base.SetItem(index, item);
        } 

        #endregion ProtectedMethods

        #region PublicMethods 

        ///  
        ///     Returns the sealed state of this object.  If true, any attempt 
        ///     at modifying the state of this object will trigger an exception.
        ///  
        public bool IsSealed
        {
            get
            { 
                return _sealed;
            } 
        } 

        #endregion PublicMethods 

        #region InternalMethods

        internal void Seal() 
        {
            Debug.Assert (Owner == null); 
 
            _sealed = true;
 
            // Seal all the setters
            for (int i=0; i= 0; i--) 
 				{ 
					InheritanceContextHelper.RemoveContextFromObject(Owner, this[i]);
 				} 
 			}
        }

        #endregion PrivateMethods 

        #region Data 
 
        private bool _sealed;
        private FrameworkElement _owner; 

        #endregion Data

    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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