Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / documents / DocumentPageHost.cs / 1305600 / DocumentPageHost.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: DocumentPageHost.cs // // Description: Provides a view port for a page of content for a DocumentPage. // //--------------------------------------------------------------------------- using System; using System.Windows; // UIElement using System.Windows.Media; // Visual namespace MS.Internal.Documents { ////// Provides a view port for a page of content for a DocumentPage. /// internal class DocumentPageHost : FrameworkElement { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Create an instance of a DocumentPageHost. /// internal DocumentPageHost() : base() { } #endregion Constructors //-------------------------------------------------------------------- // // Internal Methods // //------------------------------------------------------------------- #region Internal Methods internal static void DisconnectPageVisual(Visual pageVisual) { // There might be a case where a visual associated with a page was // inserted to a visual tree before. It got removed later, but GC did not // destroy its parent yet. To workaround this case always check for the parent // of page visual and disconnect it, when necessary. Visual currentParent = VisualTreeHelper.GetParent(pageVisual) as Visual; if (currentParent != null) { ContainerVisual pageVisualHost = currentParent as ContainerVisual; if (pageVisualHost == null) throw new ArgumentException(SR.Get(SRID.DocumentPageView_ParentNotDocumentPageHost), "pageVisual"); DocumentPageHost docPageHost = VisualTreeHelper.GetParent(pageVisualHost) as DocumentPageHost; if (docPageHost == null) throw new ArgumentException(SR.Get(SRID.DocumentPageView_ParentNotDocumentPageHost), "pageVisual"); docPageHost.PageVisual = null; } } #endregion Internal Methods //-------------------------------------------------------------------- // // Internal Properties // //-------------------------------------------------------------------- #region Internal Properties ////// Root of visual subtree hosted by this DocumentPageHost. /// internal Visual PageVisual { get { return _pageVisual; } set { ContainerVisual pageVisualHost; if (_pageVisual != null) { pageVisualHost = VisualTreeHelper.GetParent(_pageVisual) as ContainerVisual; Invariant.Assert(pageVisualHost != null); pageVisualHost.Children.Clear(); this.RemoveVisualChild(pageVisualHost); } _pageVisual = value; if (_pageVisual != null) { pageVisualHost = new ContainerVisual(); this.AddVisualChild(pageVisualHost); pageVisualHost.Children.Add(_pageVisual); pageVisualHost.SetValue(FlowDirectionProperty, FlowDirection.LeftToRight); } } } ////// Internal cached offset. /// internal Point CachedOffset; #endregion Internal Properties #region VisualChildren ////// Derived class must implement to support Visual children. The method must return /// the child at the specified index. Index must be between 0 and GetVisualChildrenCount-1. /// /// By default a Visual does not have any children. /// /// Remark: /// During this virtual call it is not valid to modify the Visual tree. /// protected override Visual GetVisualChild(int index) { if (index != 0 || _pageVisual == null) { throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange)); } return VisualTreeHelper.GetParent(_pageVisual) as Visual; } ////// Derived classes override this property to enable the Visual code to enumerate /// the Visual children. Derived classes need to return the number of children /// from this method. /// /// By default a Visual does not have any children. /// /// Remark: During this virtual method the Visual tree must not be modified. /// protected override int VisualChildrenCount { get { return _pageVisual != null ? 1 : 0; } } #endregion VisualChildren private Visual _pageVisual; } } // 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
- ToolBarOverflowPanel.cs
- CornerRadius.cs
- NetNamedPipeSecurityElement.cs
- VariantWrapper.cs
- IdentitySection.cs
- CodeNamespaceImportCollection.cs
- XmlSchemaCompilationSettings.cs
- DbSetClause.cs
- ProfileManager.cs
- ProgressiveCrcCalculatingStream.cs
- ToolStrip.cs
- PolicyChain.cs
- PopupControlService.cs
- ScrollChrome.cs
- ZoneButton.cs
- SafePEFileHandle.cs
- XamlWriter.cs
- ValueTable.cs
- XPathAxisIterator.cs
- FullTrustAssembliesSection.cs
- XsdBuilder.cs
- Margins.cs
- PenThread.cs
- StylusPointPropertyInfo.cs
- ByteStreamMessage.cs
- EventItfInfo.cs
- ElementFactory.cs
- webeventbuffer.cs
- GroupByQueryOperator.cs
- ThreadSafeList.cs
- ScalarConstant.cs
- DeferredElementTreeState.cs
- StreamWithDictionary.cs
- StorageAssociationSetMapping.cs
- CroppedBitmap.cs
- XmlRawWriter.cs
- DbProviderFactoriesConfigurationHandler.cs
- XmlNodeList.cs
- PartialCachingControl.cs
- PrivilegeNotHeldException.cs
- ButtonPopupAdapter.cs
- DeviceContext2.cs
- ModelItemExtensions.cs
- ContractMapping.cs
- UnknownWrapper.cs
- SafeRightsManagementEnvironmentHandle.cs
- ChtmlLinkAdapter.cs
- SpeechDetectedEventArgs.cs
- SvcMapFile.cs
- BamlRecordReader.cs
- SettingsAttributes.cs
- SynchronizedDispatch.cs
- FixedSOMImage.cs
- SessionIDManager.cs
- WorkflowEventArgs.cs
- ToolBarButtonClickEvent.cs
- _ListenerResponseStream.cs
- Binding.cs
- Screen.cs
- MsmqInputMessage.cs
- AutoScrollExpandMessageFilter.cs
- FixedStringLookup.cs
- TokenDescriptor.cs
- SchemaRegistration.cs
- ListViewInsertedEventArgs.cs
- UpdateEventArgs.cs
- EdmProviderManifest.cs
- MetadataArtifactLoaderCompositeResource.cs
- Expression.cs
- BrowserTree.cs
- FormatStringEditor.cs
- SQLGuidStorage.cs
- TableAutomationPeer.cs
- CustomPopupPlacement.cs
- CompiledXpathExpr.cs
- SizeAnimationUsingKeyFrames.cs
- XmlAutoDetectWriter.cs
- IDReferencePropertyAttribute.cs
- CalendarDataBindingHandler.cs
- XmlQueryType.cs
- Hashtable.cs
- CompilerState.cs
- SelectionItemProviderWrapper.cs
- PopOutPanel.cs
- AffineTransform3D.cs
- HttpCookieCollection.cs
- ProgressBarRenderer.cs
- Imaging.cs
- InfoCardRSACryptoProvider.cs
- DebuggerAttributes.cs
- QilUnary.cs
- OdbcEnvironmentHandle.cs
- Schema.cs
- WindowsFormsSectionHandler.cs
- AsyncResult.cs
- SecurityAlgorithmSuiteConverter.cs
- PropertyInformationCollection.cs
- ImplicitInputBrush.cs
- PathTooLongException.cs
- ProfileSettingsCollection.cs