Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / DrawingContext.cs / 1 / DrawingContext.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: DrawingContext.cs // // History: // GSchneid: 04/19/2003 // Created it based on the RetainedDrawingContext used in the AvPhat branch. // adsmith: 07/02/2003 // Turned this class into an abstract base class for RetainedDrawingContext // and PaintingDrawingContext. // //----------------------------------------------------------------------------- using System; using System.Security.Permissions; using System.Windows; using System.Windows.Threading; using System.Windows.Media.Animation; using System.Windows.Media; using System.Diagnostics; using MS.Internal; using System.Runtime.InteropServices; using MS.Utility; namespace System.Windows.Media { ////// Drawing context. /// public abstract partial class DrawingContext : DispatcherObject, IDisposable { #region Constructors ////// Default constructor for DrawingContext - this uses the current Dispatcher. /// internal DrawingContext() { // Nothing to do here } #endregion Constructors #region Public Methods ////// Draw Text at the location specified. /// /// The FormattedText to draw. /// The location at which to draw the text. ////// This call is illegal if this object has already been closed or disposed. /// public void DrawText(FormattedText formattedText, Point origin) { if (EventTrace.IsEnabled(EventTrace.Flags.performance, EventTrace.Level.verbose)) { EventTrace.EventProvider.TraceEvent(EventTrace.GuidFromId(EventTraceGuidId.GENERICSTRINGGUID), EventType.StartEvent, "DrawingContext.DrawText Start"); } VerifyApiNonstructuralChange(); #if DEBUG MediaTrace.DrawingContextOp.Trace("DrawText(const)"); #endif if (formattedText == null) { return; } formattedText.Draw(this, origin); if (EventTrace.IsEnabled(EventTrace.Flags.performance, EventTrace.Level.verbose)) { EventTrace.EventProvider.TraceEvent(EventTrace.GuidFromId(EventTraceGuidId.GENERICSTRINGGUID), EventType.EndEvent, "DrawingContext.DrawText End"); } } ////// Closes the DrawingContext and flushes the content. /// Afterwards the DrawingContext can not be used anymore. /// This call does not require all Push calls to have been Popped. /// ////// This call is illegal if this object has already been closed or disposed. /// public abstract void Close(); ////// This is the same as the Close call: /// Closes the DrawingContext and flushes the content. /// Afterwards the DrawingContext can not be used anymore. /// This call does not require all Push calls to have been Popped. /// ////// This call is illegal if this object has already been closed or disposed. /// void IDisposable.Dispose() { // Call a virtual method for derived Dispose implementations // // Attempting to override a explicit interface member implementation causes // the most-derived implementation to always be called, and the base // implementation becomes uncallable. But FxCop requires the base Dispose // method is always be called. To avoid this situation, we use the *Core // pattern for derived classes, instead of attempting to override // IDisposable.Dispose. VerifyAccess(); DisposeCore(); } #endregion Public Methods #region Protected Methods ////// Dispose functionality implemented by subclasses /// ////// This call is illegal if this object has already been closed or disposed. /// protected abstract void DisposeCore(); ////// This verifies that the API can be called for read only access. /// protected virtual void VerifyApiNonstructuralChange() { this.VerifyAccess(); } #endregion Protected Methods } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: DrawingContext.cs // // History: // GSchneid: 04/19/2003 // Created it based on the RetainedDrawingContext used in the AvPhat branch. // adsmith: 07/02/2003 // Turned this class into an abstract base class for RetainedDrawingContext // and PaintingDrawingContext. // //----------------------------------------------------------------------------- using System; using System.Security.Permissions; using System.Windows; using System.Windows.Threading; using System.Windows.Media.Animation; using System.Windows.Media; using System.Diagnostics; using MS.Internal; using System.Runtime.InteropServices; using MS.Utility; namespace System.Windows.Media { ////// Drawing context. /// public abstract partial class DrawingContext : DispatcherObject, IDisposable { #region Constructors ////// Default constructor for DrawingContext - this uses the current Dispatcher. /// internal DrawingContext() { // Nothing to do here } #endregion Constructors #region Public Methods ////// Draw Text at the location specified. /// /// The FormattedText to draw. /// The location at which to draw the text. ////// This call is illegal if this object has already been closed or disposed. /// public void DrawText(FormattedText formattedText, Point origin) { if (EventTrace.IsEnabled(EventTrace.Flags.performance, EventTrace.Level.verbose)) { EventTrace.EventProvider.TraceEvent(EventTrace.GuidFromId(EventTraceGuidId.GENERICSTRINGGUID), EventType.StartEvent, "DrawingContext.DrawText Start"); } VerifyApiNonstructuralChange(); #if DEBUG MediaTrace.DrawingContextOp.Trace("DrawText(const)"); #endif if (formattedText == null) { return; } formattedText.Draw(this, origin); if (EventTrace.IsEnabled(EventTrace.Flags.performance, EventTrace.Level.verbose)) { EventTrace.EventProvider.TraceEvent(EventTrace.GuidFromId(EventTraceGuidId.GENERICSTRINGGUID), EventType.EndEvent, "DrawingContext.DrawText End"); } } ////// Closes the DrawingContext and flushes the content. /// Afterwards the DrawingContext can not be used anymore. /// This call does not require all Push calls to have been Popped. /// ////// This call is illegal if this object has already been closed or disposed. /// public abstract void Close(); ////// This is the same as the Close call: /// Closes the DrawingContext and flushes the content. /// Afterwards the DrawingContext can not be used anymore. /// This call does not require all Push calls to have been Popped. /// ////// This call is illegal if this object has already been closed or disposed. /// void IDisposable.Dispose() { // Call a virtual method for derived Dispose implementations // // Attempting to override a explicit interface member implementation causes // the most-derived implementation to always be called, and the base // implementation becomes uncallable. But FxCop requires the base Dispose // method is always be called. To avoid this situation, we use the *Core // pattern for derived classes, instead of attempting to override // IDisposable.Dispose. VerifyAccess(); DisposeCore(); } #endregion Public Methods #region Protected Methods ////// Dispose functionality implemented by subclasses /// ////// This call is illegal if this object has already been closed or disposed. /// protected abstract void DisposeCore(); ////// This verifies that the API can be called for read only access. /// protected virtual void VerifyApiNonstructuralChange() { this.VerifyAccess(); } #endregion Protected Methods } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ResourceDescriptionAttribute.cs
- ClientEventManager.cs
- SHA512.cs
- TextSerializer.cs
- WebPartAuthorizationEventArgs.cs
- ElementsClipboardData.cs
- AsyncCodeActivityContext.cs
- WindowsGraphics2.cs
- SqlMethods.cs
- EventMappingSettingsCollection.cs
- XmlILIndex.cs
- PropertyExpression.cs
- XmlArrayAttribute.cs
- MILUtilities.cs
- AtomMaterializer.cs
- XMLSchema.cs
- EventDescriptor.cs
- ByteArrayHelperWithString.cs
- TextViewBase.cs
- ZoomPercentageConverter.cs
- clipboard.cs
- CommandField.cs
- ThemeableAttribute.cs
- IndexingContentUnit.cs
- SiteMapSection.cs
- SizeAnimationClockResource.cs
- Vector3D.cs
- SmiXetterAccessMap.cs
- SparseMemoryStream.cs
- TextRunCache.cs
- HttpPostedFileWrapper.cs
- NamedServiceModelExtensionCollectionElement.cs
- RegexRunner.cs
- TableSectionStyle.cs
- QueryInterceptorAttribute.cs
- AppDomainCompilerProxy.cs
- SectionXmlInfo.cs
- Matrix.cs
- FormViewUpdateEventArgs.cs
- DependencyPropertyChangedEventArgs.cs
- Span.cs
- MethodBody.cs
- OleServicesContext.cs
- Function.cs
- QilChoice.cs
- WebConfigurationHostFileChange.cs
- XPathExpr.cs
- MouseActionConverter.cs
- SerializationSectionGroup.cs
- Ipv6Element.cs
- SelectionManager.cs
- Vector3DConverter.cs
- PersistenceTypeAttribute.cs
- Transform.cs
- FormViewCommandEventArgs.cs
- ScriptModule.cs
- EditorPartChrome.cs
- SchemaTableOptionalColumn.cs
- ActivationServices.cs
- CustomErrorCollection.cs
- MenuItemCollection.cs
- HtmlElementEventArgs.cs
- RegisteredArrayDeclaration.cs
- ImageUrlEditor.cs
- Command.cs
- SystemIPGlobalStatistics.cs
- XmlAnyElementAttributes.cs
- HtmlContainerControl.cs
- Matrix3DValueSerializer.cs
- PreProcessInputEventArgs.cs
- GeometryCombineModeValidation.cs
- IEnumerable.cs
- TryLoadRunnableWorkflowCommand.cs
- ClientTargetSection.cs
- LateBoundBitmapDecoder.cs
- PathFigureCollectionConverter.cs
- EntityStoreSchemaGenerator.cs
- MatrixStack.cs
- CatalogZone.cs
- BitmapEffectDrawing.cs
- XmlSchemaElement.cs
- CommunicationObjectManager.cs
- AnimatedTypeHelpers.cs
- RawStylusInput.cs
- SpecialNameAttribute.cs
- SequenceDesigner.cs
- GeneratedView.cs
- Expression.cs
- NumericUpDown.cs
- documentsequencetextcontainer.cs
- ContextMenuStripGroup.cs
- WindowsFormsHostPropertyMap.cs
- ProcessInputEventArgs.cs
- SiteIdentityPermission.cs
- CodeTypeMember.cs
- ActiveXContainer.cs
- ControlPaint.cs
- FileDialogCustomPlacesCollection.cs
- ObfuscateAssemblyAttribute.cs
- EndpointBehaviorElement.cs