RoutedPropertyChangedEventArgs.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 / RoutedPropertyChangedEventArgs.cs / 1 / RoutedPropertyChangedEventArgs.cs
                        

                        
                            using System; 
using System.Windows;
using System.Windows.Input;

// Disable CS3001, CS3003, CS3024: Warning as Error: not CLS-compliant 
#pragma warning disable 3001, 3003, 3024
 
namespace System.Windows 
{
    ///  
    ///     This delegate must used by handlers of the RoutedPropertyChangedEvent event.
    /// 
    /// The current element along the event's route.
    /// The event arguments containing additional information about the event. 
    /// Nothing.
    public delegate void RoutedPropertyChangedEventHandler(object sender, RoutedPropertyChangedEventArgs e); 
 
    /// 
    /// This RoutedPropertyChangedEventArgs class contains old and new value when 
    /// RoutedPropertyChangedEvent is raised.
    /// 
    /// 
    ///  
    public class RoutedPropertyChangedEventArgs : RoutedEventArgs
    { 
        ///  
        /// This is an instance constructor for the RoutedPropertyChangedEventArgs class.
        /// It is constructed with a reference to the event being raised. 
        /// 
        /// The old property value
        /// The new property value
        /// Nothing. 
        public RoutedPropertyChangedEventArgs(T oldValue, T newValue)
            : base() 
        { 
            _oldValue = oldValue;
            _newValue = newValue; 
        }

        /// 
        /// This is an instance constructor for the RoutedPropertyChangedEventArgs class. 
        /// It is constructed with a reference to the event being raised.
        ///  
        /// The old property value 
        /// The new property value
        /// RoutedEvent 
        /// Nothing.
        public RoutedPropertyChangedEventArgs(T oldValue, T newValue, RoutedEvent routedEvent)
            : this(oldValue, newValue)
        { 
            RoutedEvent = routedEvent;
        } 
 
        /// 
        /// Return the old value 
        /// 
        public T OldValue
        {
            get { return _oldValue; } 
        }
 
        ///  
        /// Return the new value
        ///  
        public T NewValue
        {
            get { return _newValue; }
        } 

        ///  
        /// This method is used to perform the proper type casting in order to 
        /// call the type-safe RoutedPropertyChangedEventHandler delegate for the IsCheckedChangedEvent event.
        ///  
        /// The handler to invoke.
        /// The current object along the event's route.
        /// Nothing.
        ///  
        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget)
        { 
            RoutedPropertyChangedEventHandler handler = (RoutedPropertyChangedEventHandler)genericHandler; 
            handler(genericTarget, this);
        } 

        private T _oldValue;
        private T _newValue;
    } 
}

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

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