MouseOverProperty.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 / Core / System / Windows / MouseOverProperty.cs / 2 / MouseOverProperty.cs
                        

                        
                            using System; 
using MS.Internal.KnownBoxes;
using System.Windows.Input;

namespace System.Windows 
{
    ///////////////////////////////////////////////////////////////////////// 
 
    internal class MouseOverProperty : ReverseInheritProperty
    { 
        /////////////////////////////////////////////////////////////////////

        internal MouseOverProperty() : base(
            UIElement.IsMouseOverPropertyKey, 
            CoreFlags.IsMouseOverCache,
            CoreFlags.IsMouseOverChanged) 
        { 
        }
 
        /////////////////////////////////////////////////////////////////////

        internal override void FireNotifications(UIElement uie, ContentElement ce, UIElement3D uie3D, bool oldValue)
        { 
            // Before we fire the mouse event we need to figure if the notification is still relevant.
            // This is because it is possible that the mouse state has changed during the previous 
            // property engine callout. Example: Consider a MessageBox being displayed during the 
            // IsMouseOver OnPropertyChanged override.
 
            bool shouldFireNotification = false;
            if (uie != null)
            {
                shouldFireNotification = (!oldValue && uie.IsMouseOver) || (oldValue && !uie.IsMouseOver); 
            }
            else if (ce != null) 
            { 
                shouldFireNotification = (!oldValue && ce.IsMouseOver) || (oldValue && !ce.IsMouseOver);
            } 
            else if (uie3D != null)
            {
                shouldFireNotification = (!oldValue && uie3D.IsMouseOver) || (oldValue && !uie3D.IsMouseOver);
            } 

            if (shouldFireNotification) 
            { 
                MouseEventArgs mouseEventArgs = new MouseEventArgs(Mouse.PrimaryDevice, Environment.TickCount, Mouse.PrimaryDevice.StylusDevice);
                mouseEventArgs.RoutedEvent = oldValue ? Mouse.MouseLeaveEvent : Mouse.MouseEnterEvent; 

                if (uie != null)
                {
                    uie.RaiseEvent(mouseEventArgs); 
                }
                else if (ce != null) 
                { 
                    ce.RaiseEvent(mouseEventArgs);
                } 
                else if (uie3D != null)
                {
                    uie3D.RaiseEvent(mouseEventArgs);
                } 
            }
        } 
    } 
}
 

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

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