StylusOverProperty.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / StylusOverProperty.cs / 1305600 / StylusOverProperty.cs
                        

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

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

        internal StylusOverProperty() : base(
            UIElement.IsStylusOverPropertyKey, 
            CoreFlags.IsStylusOverCache,
            CoreFlags.IsStylusOverChanged) 
        { 
        }
 
        /////////////////////////////////////////////////////////////////////

        internal override void FireNotifications(UIElement uie, ContentElement ce, UIElement3D uie3D, bool oldValue)
        { 
            // This is all very sketchy...
            // 
            // Tablet can support multiple stylus devices concurrently.  They can each 
            // be over a different element.  They all update the IsStylusOver property,
            // which calls into here, but ends up using the "current" stylus device, 
            // instead of each using their own device.  Worse, all of these will end up
            // writing to the same bits in the UIElement.  They are going to step all over
            // each other.
            if(Stylus.CurrentStylusDevice == null) 
            {
                return; 
            } 

            StylusEventArgs stylusEventArgs = new StylusEventArgs(Stylus.CurrentStylusDevice, Environment.TickCount); 
            stylusEventArgs.RoutedEvent = oldValue ? Stylus.StylusLeaveEvent : Stylus.StylusEnterEvent;

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

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

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