SelectionChangedEventArgs.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

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

                        
                            using System.ComponentModel; 

using System.Collections;
using System.Collections.Generic;
using System.Windows.Threading; 

using System.Windows.Data; 
 
using System.Windows.Automation;
using System.Windows.Automation.Provider; 
using MS.Utility;

using System.Windows;
using System; 
using System.Diagnostics;
 
namespace System.Windows.Controls 
{
    ///  
    /// The delegate type for handling a selection changed event
    /// 
    public delegate void SelectionChangedEventHandler(
        object sender, 
        SelectionChangedEventArgs e);
 
    ///  
    /// The inputs to a selection changed event handler
    ///  
    public class SelectionChangedEventArgs : RoutedEventArgs
    {
        #region Constructors
 
        /// 
        /// The constructor for selection changed args 
        ///  
        /// The event ID for the event about to fire -- should probably be Selector.SelectionChangedEvent
        /// The items that were unselected during this event 
        /// The items that were selected during this event
        public SelectionChangedEventArgs(
            RoutedEvent id,
            IList removedItems, 
            IList addedItems)
        { 
            if (id == null) 
                throw new ArgumentNullException("id");
            if (removedItems == null) 
                throw new ArgumentNullException("removedItems");
            if (addedItems == null)
                throw new ArgumentNullException("addedItems");
 
            RoutedEvent = id;
 
            _removedItems = new object[removedItems.Count]; 
            removedItems.CopyTo(_removedItems, 0);
 
            _addedItems = new object[addedItems.Count];
            addedItems.CopyTo(_addedItems, 0);
        }
 
        internal SelectionChangedEventArgs(IList removedItems, IList addedItems)
            : this(System.Windows.Controls.Primitives.Selector.SelectionChangedEvent, removedItems, addedItems) 
        { 
        }
 
        #endregion

        #region Public Properties
 
        /// 
        /// An IList containing the items that were unselected during this event 
        ///  
        public IList RemovedItems
        { 
            get { return _removedItems; }
        }

        ///  
        /// An IList containing the items that were selected during this event
        ///  
        public IList AddedItems 
        {
            get { return _addedItems; } 
        }

        #endregion
 
        #region Protected Methods
 
        ///  
        /// This method is used to perform the proper type casting in order to
        /// call the type-safe SelectionChangedEventHandler delegate for the SelectionChangedEvent event. 
        /// 
        /// The handler to invoke.
        /// The current object along the event's route.
        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget) 
        {
            SelectionChangedEventHandler handler = (SelectionChangedEventHandler)genericHandler; 
 
            handler(genericTarget, this);
        } 

        #endregion

        #region Data 

        private object[] _addedItems; 
        private object[] _removedItems; 

        #endregion 
    }
}

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

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