Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / DrawingVisualDrawingContext.cs / 1 / DrawingVisualDrawingContext.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: VisualDrawingContext.cs // // History: // [....]: 04/19/2003 // Created it based on the DrawingVisualDrawingContext used in the AvPhat branch. // [....]: 07/02/2003 // Renamed to RetainedDrawingContext, which derives from DrawingContext // [....]: 07/16/2003 // Renamed again to DrawingVisualDrawingContext, which derives from RenderDataDrawingContext // //----------------------------------------------------------------------------- using System; using System.Security.Permissions; using System.Windows; using System.Windows.Threading; using System.Windows.Media.Animation; using System.Windows.Media; using System.Windows.Media.Composition; using System.Diagnostics; using MS.Internal; namespace System.Windows.Media { ////// VisualDrawingContext - the DrawingContext for Visuals that can create it. /// internal class VisualDrawingContext : RenderDataDrawingContext { #region Constructors ////// Creates a drawing context for a DrawingVisual. /// The Visual must not be null. /// /// The Visual that created the DrawingContext, which must not be null. internal VisualDrawingContext( Visual ownerVisual ) { Debug.Assert(null != ownerVisual); _ownerVisual = ownerVisual; } #endregion Constructors #region Protected Methods ////// CloseCore - Implemented be derivees to Close the context. /// This will only be called once (if ever) per instance. /// /// The render data produced by this RenderDataDrawingContext. protected override void CloseCore(RenderData renderData) { Debug.Assert(null != _ownerVisual); _ownerVisual.RenderClose(renderData); #if DEBUG _ownerVisual = null; #endif } #endregion Protected Methods #region Private Fields private Visual _ownerVisual; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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