AnnotationResourceCollection.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Annotations / AnnotationResourceCollection.cs / 1305600 / AnnotationResourceCollection.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) 2003 by Microsoft Corporation.  All rights reserved.
//  
//
// Description: Subclass of AnnotationObservableCollection which has slightly different 
//              eventing behavior for ClearItems and SetItem methods.  This class 
//              is used specifically for AnnotationResources.
// 
// History:
//  03/10/2005 : rruiz - created
//
//--------------------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Collections.Specialized;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Annotations; 
using System.Windows.Data;
 
namespace MS.Internal.Annotations 
{
    ///  
    ///     Subclass of AnnotationObservableCollection which has slightly different
    ///     eventing behavior for ClearItems and SetItem methods.  This class
    ///     is used specifically for AnnotationResources.
    ///  
    internal sealed class AnnotationResourceCollection : AnnotationObservableCollection
    { 
        //----------------------------------------------------- 
        //
        //  Constructors 
        //
        //-----------------------------------------------------

        #region Constructors 

        ///  
        /// Initializes a new instance of AnnotationResourceCollection that is empty and has default initial capacity. 
        /// 
        public AnnotationResourceCollection() : base() 
        {
        }

 
        #endregion Constructors
 
        //------------------------------------------------------ 
        //
        //  Public Events 
        //
        //-----------------------------------------------------

        #region Public Events 

        ///  
        ///    Event fired when an item in the collection changes (fires a PropertyChanged event). 
        /// 
        public event PropertyChangedEventHandler ItemChanged; 

        #endregion Public Events

        //------------------------------------------------------ 
        //
        //  Protected Methods 
        // 
        //------------------------------------------------------
 
        #region Protected Methods

        /// 
        ///    Override this method and provide a different set of events 
        ///    when items are cleared from the collection.  Specifically,
        ///    fire a Remove event for each item in the collection. 
        ///  
        protected override void ProtectedClearItems()
        { 
            // We want to fire for each item in the list
            List list = new List(this);
            Items.Clear();  // directly clear Collection inner Items collection
            OnPropertyChanged(CountString); 
            OnPropertyChanged(IndexerName);
            OnCollectionCleared(list); 
        } 

        ///  
        ///     Override this method and provide a different set of events
        ///     when an item is set on a given index in this collection.
        ///     Specifically, fire a both a Remove and Add event (as the
        ///     grand-parent class ObservableCollection does). 
        /// 
        /// index of item to set 
        /// item to set at that index 
        protected override void ProtectedSetItem(int index, AnnotationResource item)
        { 
            // Use the standard built in events (one for item removed and one for item added)
            ObservableCollectionSetItem(index, item);  // Calls raw ObservableCollection method
        }
 
        #endregion Protected Methods
 
 
        //-----------------------------------------------------
        // 
        //  Private Methods
        //
        //------------------------------------------------------
 
        #region Private Methods
 
        // fire an event for each item removed from the collection 
        void OnCollectionCleared(IEnumerable list)
        { 
            foreach(object item in list)
            {
                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item, 0));
            } 
        }
 
        private void OnPropertyChanged(string propertyName) 
        {
            OnPropertyChanged(new PropertyChangedEventArgs(propertyName)); 
        }

        // raise CollectionChanged event to any listeners
        protected override void OnItemPropertyChanged(object sender, PropertyChangedEventArgs e) 
        {
            if (ItemChanged != null) 
            { 
                ItemChanged(sender, e);
            } 
        }

        #endregion Private Methods
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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AnnotationResourceCollection.cs source code in C# .NET

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