HitTestFilterBehavior.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 / Media / HitTestFilterBehavior.cs / 1305600 / HitTestFilterBehavior.cs

                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, 2003
//
//  File:       HitTestFilterBehavior 
//-----------------------------------------------------------------------------
 
using System; 
using System.Windows.Media;
using System.Windows.Media.Animation; 
using System.Windows.Threading;

using System.Collections;
using System.Diagnostics; 
using MS.Internal;
 
namespace System.Windows.Media 
{
    ///  
    /// Behavior for filtering visuals while hit tesitng
    /// 
    // This enum intentionally does not have a [Flags] attribute.  Internally we break this enum
    // into flags, but the enum values already contain all legal combinations.  Users should not 
    // be combining these flags.  (Windows OS #1010970)
    public enum HitTestFilterBehavior 
    { 
        /// 
        /// Hit test against current visual and not its children. 
        /// 
        ContinueSkipChildren = HTFBInterpreter.c_DoHitTest,

        ///  
        /// Do not hit test against current visual or its children.
        ///  
        ContinueSkipSelfAndChildren = 0, 

        ///  
        /// Do not hit test against current visual but hit test against children.
        /// 
        ContinueSkipSelf = HTFBInterpreter.c_IncludeChidren,
 
        /// 
        /// Hit test against current visual and children. 
        ///  
        Continue = HTFBInterpreter.c_DoHitTest | HTFBInterpreter.c_IncludeChidren,
 
        /// 
        /// Stop any further hit testing and return.
        /// 
        Stop = HTFBInterpreter.c_Stop 
    }
 
    ///  
    /// Delegate for hit tester to control whether to test against the
    /// current scene graph node. 
    /// 
    public delegate HitTestFilterBehavior HitTestFilterCallback(DependencyObject potentialHitTestTarget);

    // Static helper class with methods for interpreting the HitTestFilterBehavior enum. 
    internal static class HTFBInterpreter
    { 
        internal const int c_DoHitTest        = (1 << 1); 
        internal const int c_IncludeChidren   = (1 << 2);
        internal const int c_Stop             = (1 << 3); 

        internal static bool DoHitTest(HitTestFilterBehavior behavior)
        {
            return (((int)behavior) & c_DoHitTest) == c_DoHitTest; 
        }
 
        internal static bool IncludeChildren(HitTestFilterBehavior behavior) 
        {
            return (((int)behavior) & c_IncludeChidren) == c_IncludeChidren; 
        }

        internal static bool Stop(HitTestFilterBehavior behavior)
        { 
            return (((int)behavior) & c_Stop) == c_Stop;
        } 
 
        internal static bool SkipSubgraph(HitTestFilterBehavior behavior)
        { 
            return behavior == HitTestFilterBehavior.ContinueSkipSelfAndChildren;
        }
    }
} 


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

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