Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / VisualTarget.cs / 1 / VisualTarget.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // // History: // 01/06/2005 : ABaioura - Created. // //----------------------------------------------------------------------------- using System.Windows.Media; using System.Windows.Media.Composition; using System.Security; using System.Diagnostics; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { ////// /// public class VisualTarget : CompositionTarget { //--------------------------------------------------------------------- // // Constructors // //--------------------------------------------------------------------- #region Constructors ////// VisualTarget /// public VisualTarget(HostVisual hostVisual) { if (hostVisual == null) { throw new ArgumentNullException("hostVisual"); } _hostVisual = hostVisual; _connected = false; MediaContext.RegisterICompositionTarget(Dispatcher, this); } ////// This function gets called when VisualTarget is created on the channel /// i.e. from CreateUCEResources. /// private void BeginHosting() { Debug.Assert(!_connected); try { // // Initiate hosting by the specified host visual. // _hostVisual.BeginHosting(this); _connected = true; } catch { // // If exception has occurred after we have registered with // MediaContext, we need to unregister to properly release // allocated resources. // NOTE: We need to properly unregister in a disconnected state // MediaContext.UnregisterICompositionTarget(Dispatcher, this); throw; } } internal override void CreateUCEResources(DUCE.Channel channel, DUCE.Channel outOfBandChannel) { Debug.Assert(channel != null); Debug.Assert(outOfBandChannel != null); if (!channel.IsLayeredWindowChannel) { _outOfBandChannel = outOfBandChannel; // create visual target resources base.CreateUCEResources(channel, outOfBandChannel); // Update state to propagate flags as necessary StateChangedCallback( new object[] { HostStateFlags.None }); // // Addref content node on the channel. We need extra reference // on that node so that it does not get immediately released // when Dispose is called. Actual release of the node needs // to be synchronized with node disconnect by the host. // bool resourceCreated = _contentRoot.CreateOrAddRefOnChannel(outOfBandChannel, s_contentRootType); Debug.Assert(!resourceCreated); _contentRoot.CreateOrAddRefOnChannel(channel, s_contentRootType); BeginHosting(); } } #endregion Constructors //---------------------------------------------------------------------- // // Public Properties // //--------------------------------------------------------------------- #region Public Properties ////// Returns matrix that can be used to transform coordinates from this /// target to the rendering destination device. /// public override Matrix TransformToDevice { get { VerifyAPIReadOnly(); Matrix m = WorldTransform; m.Invert(); return m; } } ////// Returns matrix that can be used to transform coordinates from /// the rendering destination device to this target. /// public override Matrix TransformFromDevice { get { VerifyAPIReadOnly(); return WorldTransform; } } #endregion Public Properties //---------------------------------------------------------------------- // // Public Methods // //---------------------------------------------------------------------- #region Private Fields ////// Dispose cleans up the state associated with HwndTarget. /// ////// Critical: Sets RootVisual to null /// PublicOK: This code has the same affect as removing elements in a window /// [SecurityCritical] public override void Dispose() { try { VerifyAccess(); if (!IsDisposed) { if (_hostVisual != null && _connected) { RootVisual = null; // // Unregister this CompositionTarget from the MediaSystem. // // we need to properly unregister in a disconnected state MediaContext.UnregisterICompositionTarget(Dispatcher, this); } } } finally { base.Dispose(); } } ////// This function gets called when VisualTarget is removed on the channel /// i.e. from ReleaseUCEResources. /// private void EndHosting() { Debug.Assert(_connected); _hostVisual.EndHosting(); _connected = false; } ////// This method is used to release all uce resources either on Shutdown or session disconnect /// internal override void ReleaseUCEResources(DUCE.Channel channel, DUCE.Channel outOfBandChannel) { if (!channel.IsLayeredWindowChannel) { EndHosting(); _contentRoot.ReleaseOnChannel(channel); if (_contentRoot.IsOnChannel(outOfBandChannel)) { _contentRoot.ReleaseOnChannel(outOfBandChannel); } base.ReleaseUCEResources(channel, outOfBandChannel); } } #endregion Public Methods #region Internal Properties ////// The out of band channel on our the MediaContext this /// resource was created. /// This is needed by HostVisual for handle duplication. /// internal DUCE.Channel OutOfBandChannel { get { return _outOfBandChannel; } } #endregion Internal Properties //--------------------------------------------------------------------- // // Private Fields // //---------------------------------------------------------------------- #region Private Fields DUCE.Channel _outOfBandChannel; private HostVisual _hostVisual; // Flag indicating whether VisualTarget-HostVisual connection exists. private bool _connected; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // // History: // 01/06/2005 : ABaioura - Created. // //----------------------------------------------------------------------------- using System.Windows.Media; using System.Windows.Media.Composition; using System.Security; using System.Diagnostics; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { ////// /// public class VisualTarget : CompositionTarget { //--------------------------------------------------------------------- // // Constructors // //--------------------------------------------------------------------- #region Constructors ////// VisualTarget /// public VisualTarget(HostVisual hostVisual) { if (hostVisual == null) { throw new ArgumentNullException("hostVisual"); } _hostVisual = hostVisual; _connected = false; MediaContext.RegisterICompositionTarget(Dispatcher, this); } ////// This function gets called when VisualTarget is created on the channel /// i.e. from CreateUCEResources. /// private void BeginHosting() { Debug.Assert(!_connected); try { // // Initiate hosting by the specified host visual. // _hostVisual.BeginHosting(this); _connected = true; } catch { // // If exception has occurred after we have registered with // MediaContext, we need to unregister to properly release // allocated resources. // NOTE: We need to properly unregister in a disconnected state // MediaContext.UnregisterICompositionTarget(Dispatcher, this); throw; } } internal override void CreateUCEResources(DUCE.Channel channel, DUCE.Channel outOfBandChannel) { Debug.Assert(channel != null); Debug.Assert(outOfBandChannel != null); if (!channel.IsLayeredWindowChannel) { _outOfBandChannel = outOfBandChannel; // create visual target resources base.CreateUCEResources(channel, outOfBandChannel); // Update state to propagate flags as necessary StateChangedCallback( new object[] { HostStateFlags.None }); // // Addref content node on the channel. We need extra reference // on that node so that it does not get immediately released // when Dispose is called. Actual release of the node needs // to be synchronized with node disconnect by the host. // bool resourceCreated = _contentRoot.CreateOrAddRefOnChannel(outOfBandChannel, s_contentRootType); Debug.Assert(!resourceCreated); _contentRoot.CreateOrAddRefOnChannel(channel, s_contentRootType); BeginHosting(); } } #endregion Constructors //---------------------------------------------------------------------- // // Public Properties // //--------------------------------------------------------------------- #region Public Properties ////// Returns matrix that can be used to transform coordinates from this /// target to the rendering destination device. /// public override Matrix TransformToDevice { get { VerifyAPIReadOnly(); Matrix m = WorldTransform; m.Invert(); return m; } } ////// Returns matrix that can be used to transform coordinates from /// the rendering destination device to this target. /// public override Matrix TransformFromDevice { get { VerifyAPIReadOnly(); return WorldTransform; } } #endregion Public Properties //---------------------------------------------------------------------- // // Public Methods // //---------------------------------------------------------------------- #region Private Fields ////// Dispose cleans up the state associated with HwndTarget. /// ////// Critical: Sets RootVisual to null /// PublicOK: This code has the same affect as removing elements in a window /// [SecurityCritical] public override void Dispose() { try { VerifyAccess(); if (!IsDisposed) { if (_hostVisual != null && _connected) { RootVisual = null; // // Unregister this CompositionTarget from the MediaSystem. // // we need to properly unregister in a disconnected state MediaContext.UnregisterICompositionTarget(Dispatcher, this); } } } finally { base.Dispose(); } } ////// This function gets called when VisualTarget is removed on the channel /// i.e. from ReleaseUCEResources. /// private void EndHosting() { Debug.Assert(_connected); _hostVisual.EndHosting(); _connected = false; } ////// This method is used to release all uce resources either on Shutdown or session disconnect /// internal override void ReleaseUCEResources(DUCE.Channel channel, DUCE.Channel outOfBandChannel) { if (!channel.IsLayeredWindowChannel) { EndHosting(); _contentRoot.ReleaseOnChannel(channel); if (_contentRoot.IsOnChannel(outOfBandChannel)) { _contentRoot.ReleaseOnChannel(outOfBandChannel); } base.ReleaseUCEResources(channel, outOfBandChannel); } } #endregion Public Methods #region Internal Properties ////// The out of band channel on our the MediaContext this /// resource was created. /// This is needed by HostVisual for handle duplication. /// internal DUCE.Channel OutOfBandChannel { get { return _outOfBandChannel; } } #endregion Internal Properties //--------------------------------------------------------------------- // // Private Fields // //---------------------------------------------------------------------- #region Private Fields DUCE.Channel _outOfBandChannel; private HostVisual _hostVisual; // Flag indicating whether VisualTarget-HostVisual connection exists. private bool _connected; #endregion Private Fields } } // 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
- XmlIgnoreAttribute.cs
- FileSecurity.cs
- IPHostEntry.cs
- Size3DConverter.cs
- DataGridView.cs
- EndEvent.cs
- InputLanguageSource.cs
- SafeArrayTypeMismatchException.cs
- IPAddress.cs
- ZipIOLocalFileDataDescriptor.cs
- TrackingProfileDeserializationException.cs
- PreviewPageInfo.cs
- ProgressPage.cs
- Journaling.cs
- IsolatedStorageFile.cs
- DesignerActionKeyboardBehavior.cs
- CodeThrowExceptionStatement.cs
- StandardToolWindows.cs
- ExplicitDiscriminatorMap.cs
- BitmapEffectInput.cs
- OleDbRowUpdatedEvent.cs
- MultiPartWriter.cs
- XamlFilter.cs
- PlacementWorkspace.cs
- XomlCompilerResults.cs
- CalendarDesigner.cs
- complextypematerializer.cs
- ObjectItemConventionAssemblyLoader.cs
- MsmqIntegrationSecurity.cs
- precedingsibling.cs
- DefaultPerformanceCounters.cs
- ButtonBase.cs
- RijndaelManaged.cs
- AccessKeyManager.cs
- EmptyQuery.cs
- Dynamic.cs
- ObjectStateEntry.cs
- VerticalAlignConverter.cs
- DynamicObjectAccessor.cs
- ResourceLoader.cs
- SQLDouble.cs
- ToolboxComponentsCreatedEventArgs.cs
- activationcontext.cs
- OwnerDrawPropertyBag.cs
- util.cs
- linebase.cs
- MailDefinition.cs
- CustomValidator.cs
- precedingquery.cs
- PropertySet.cs
- SiteIdentityPermission.cs
- XmlQueryContext.cs
- MultiByteCodec.cs
- XhtmlTextWriter.cs
- connectionpool.cs
- Transactions.cs
- CodeLinePragma.cs
- MutexSecurity.cs
- PageSetupDialog.cs
- ListViewItemSelectionChangedEvent.cs
- ComplexTypeEmitter.cs
- TemplateKeyConverter.cs
- XmlQueryCardinality.cs
- MasterPageBuildProvider.cs
- FileChangeNotifier.cs
- FunctionUpdateCommand.cs
- StoreConnection.cs
- ExecutedRoutedEventArgs.cs
- ChangeDirector.cs
- FixedSOMTableRow.cs
- ClientFormsIdentity.cs
- RunWorkerCompletedEventArgs.cs
- OdbcDataAdapter.cs
- HostedHttpRequestAsyncResult.cs
- MetadataItem.cs
- DBSchemaTable.cs
- IgnoreSectionHandler.cs
- CustomAttributeBuilder.cs
- Timer.cs
- FlagsAttribute.cs
- CommandField.cs
- SchemaImporter.cs
- TracedNativeMethods.cs
- Vector.cs
- EntityConnectionStringBuilderItem.cs
- UnsafeNativeMethods.cs
- DispatcherExceptionFilterEventArgs.cs
- DecimalConverter.cs
- SurrogateSelector.cs
- SelectionEditor.cs
- TimeStampChecker.cs
- PropertyChangedEventArgs.cs
- OverflowException.cs
- ExpandCollapsePatternIdentifiers.cs
- NamespaceCollection.cs
- CodeCompiler.cs
- PersistenceTypeAttribute.cs
- ArgumentException.cs
- PassportAuthentication.cs
- SmtpFailedRecipientException.cs