Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / System / Windows / TreeChangeInfo.cs / 1 / TreeChangeInfo.cs
//---------------------------------------------------------------------------- // // File: TreeChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during an AncestorChanged tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Media; using System.Windows.Controls; using System.Windows.Documents; using MS.Internal; using MS.Utility; namespace System.Windows { ////// This is the data that is passed through the DescendentsWalker /// during an AncestorChange tree-walk. /// internal struct TreeChangeInfo { #region Properties public TreeChangeInfo(DependencyObject root, DependencyObject parent, bool isAddOperation) { _rootOfChange = root; _isAddOperation = isAddOperation; _topmostCollapsedParentNode = null; _rootInheritableValues = null; _inheritablePropertiesStack = null; _valueIndexer = 0; // Create the InheritableProperties cache for the parent // and push it to start the stack ... we don't need to // pop this when we're done because we'll be throing the // stack away at that point. InheritablePropertiesStack.Push(CreateParentInheritableProperties(root, parent, isAddOperation)); } // // This method // 1. Is called from AncestorChange InvalidateTree. // 2. It is used to create the InheritableProperties on the given node. // 3. It also accumulates oldValues for the inheritable properties that are about to be invalidated // internal FrugalObjectListCreateParentInheritableProperties( DependencyObject d, DependencyObject parent, bool isAddOperation) { Debug.Assert(d != null, "Must have non-null current node"); if (parent == null) { return new FrugalObjectList (0); } DependencyObjectType treeObjDOT = d.DependencyObjectType; // See if we have a cached value. EffectiveValueEntry[] parentEffectiveValues = null; uint parentEffectiveValuesCount = 0; uint inheritablePropertiesCount = 0; // If inheritable properties aren't cached on you then use the effective // values cache on the parent to discover those inherited properties that // may need to be invalidated on the children nodes. if (!parent.IsSelfInheritanceParent) { DependencyObject inheritanceParent = parent.InheritanceParent; if (inheritanceParent != null) { parentEffectiveValues = inheritanceParent.EffectiveValues; parentEffectiveValuesCount = inheritanceParent.EffectiveValuesCount; inheritablePropertiesCount = inheritanceParent.InheritableEffectiveValuesCount; } } else { parentEffectiveValues = parent.EffectiveValues; parentEffectiveValuesCount = parent.EffectiveValuesCount; inheritablePropertiesCount = parent.InheritableEffectiveValuesCount; } FrugalObjectList inheritableProperties = new FrugalObjectList ((int) inheritablePropertiesCount); if (inheritablePropertiesCount == 0) { return inheritableProperties; } _rootInheritableValues = new InheritablePropertyChangeInfo[(int) inheritablePropertiesCount]; int inheritableIndex = 0; FrameworkObject foParent = new FrameworkObject(parent); for (uint i=0; i /// This is a stack that is used during an AncestorChange operation. /// I holds the InheritableProperties cache on the parent nodes in /// the tree in the order of traversal. The top of the stack holds /// the cache for the immediate parent node. /// internal Stack > InheritablePropertiesStack { get { if (_inheritablePropertiesStack == null) { _inheritablePropertiesStack = new Stack >(1); } return _inheritablePropertiesStack; } } /// /// When we enter a Visibility=Collapsed subtree, we remember that node /// using this property. As we process the children of this collapsed /// node, we see this property as non-null and know we're collapsed. /// As we exit the subtree, this reference is nulled out which means /// we don't know whether we're in a collapsed tree and the optimizations /// based on Visibility=Collapsed are not valid and should not be used. /// internal object TopmostCollapsedParentNode { get { return _topmostCollapsedParentNode; } set { _topmostCollapsedParentNode = value; } } // Indicates if this is a add child tree operation internal bool IsAddOperation { get { return _isAddOperation; } } // This is the element at the root of the sub-tree that had a parent change. internal DependencyObject Root { get { return _rootOfChange; } } #endregion Properties #region Data private Stack> _inheritablePropertiesStack; private object _topmostCollapsedParentNode; private bool _isAddOperation; private DependencyObject _rootOfChange; private InheritablePropertyChangeInfo[] _rootInheritableValues; private int _valueIndexer; #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // File: TreeChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during an AncestorChanged tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Media; using System.Windows.Controls; using System.Windows.Documents; using MS.Internal; using MS.Utility; namespace System.Windows { /// /// This is the data that is passed through the DescendentsWalker /// during an AncestorChange tree-walk. /// internal struct TreeChangeInfo { #region Properties public TreeChangeInfo(DependencyObject root, DependencyObject parent, bool isAddOperation) { _rootOfChange = root; _isAddOperation = isAddOperation; _topmostCollapsedParentNode = null; _rootInheritableValues = null; _inheritablePropertiesStack = null; _valueIndexer = 0; // Create the InheritableProperties cache for the parent // and push it to start the stack ... we don't need to // pop this when we're done because we'll be throing the // stack away at that point. InheritablePropertiesStack.Push(CreateParentInheritableProperties(root, parent, isAddOperation)); } // // This method // 1. Is called from AncestorChange InvalidateTree. // 2. It is used to create the InheritableProperties on the given node. // 3. It also accumulates oldValues for the inheritable properties that are about to be invalidated // internal FrugalObjectListCreateParentInheritableProperties( DependencyObject d, DependencyObject parent, bool isAddOperation) { Debug.Assert(d != null, "Must have non-null current node"); if (parent == null) { return new FrugalObjectList (0); } DependencyObjectType treeObjDOT = d.DependencyObjectType; // See if we have a cached value. EffectiveValueEntry[] parentEffectiveValues = null; uint parentEffectiveValuesCount = 0; uint inheritablePropertiesCount = 0; // If inheritable properties aren't cached on you then use the effective // values cache on the parent to discover those inherited properties that // may need to be invalidated on the children nodes. if (!parent.IsSelfInheritanceParent) { DependencyObject inheritanceParent = parent.InheritanceParent; if (inheritanceParent != null) { parentEffectiveValues = inheritanceParent.EffectiveValues; parentEffectiveValuesCount = inheritanceParent.EffectiveValuesCount; inheritablePropertiesCount = inheritanceParent.InheritableEffectiveValuesCount; } } else { parentEffectiveValues = parent.EffectiveValues; parentEffectiveValuesCount = parent.EffectiveValuesCount; inheritablePropertiesCount = parent.InheritableEffectiveValuesCount; } FrugalObjectList inheritableProperties = new FrugalObjectList ((int) inheritablePropertiesCount); if (inheritablePropertiesCount == 0) { return inheritableProperties; } _rootInheritableValues = new InheritablePropertyChangeInfo[(int) inheritablePropertiesCount]; int inheritableIndex = 0; FrameworkObject foParent = new FrameworkObject(parent); for (uint i=0; i /// This is a stack that is used during an AncestorChange operation. /// I holds the InheritableProperties cache on the parent nodes in /// the tree in the order of traversal. The top of the stack holds /// the cache for the immediate parent node. /// internal Stack > InheritablePropertiesStack { get { if (_inheritablePropertiesStack == null) { _inheritablePropertiesStack = new Stack >(1); } return _inheritablePropertiesStack; } } /// /// When we enter a Visibility=Collapsed subtree, we remember that node /// using this property. As we process the children of this collapsed /// node, we see this property as non-null and know we're collapsed. /// As we exit the subtree, this reference is nulled out which means /// we don't know whether we're in a collapsed tree and the optimizations /// based on Visibility=Collapsed are not valid and should not be used. /// internal object TopmostCollapsedParentNode { get { return _topmostCollapsedParentNode; } set { _topmostCollapsedParentNode = value; } } // Indicates if this is a add child tree operation internal bool IsAddOperation { get { return _isAddOperation; } } // This is the element at the root of the sub-tree that had a parent change. internal DependencyObject Root { get { return _rootOfChange; } } #endregion Properties #region Data private Stack> _inheritablePropertiesStack; private object _topmostCollapsedParentNode; private bool _isAddOperation; private DependencyObject _rootOfChange; private InheritablePropertyChangeInfo[] _rootInheritableValues; private int _valueIndexer; #endregion Data } } // 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
- WSSecurityOneDotOneSendSecurityHeader.cs
- TaskFormBase.cs
- DrawingContextWalker.cs
- SetStoryboardSpeedRatio.cs
- PartBasedPackageProperties.cs
- QueryComponents.cs
- XmlKeywords.cs
- EventsTab.cs
- DataSourceSelectArguments.cs
- XPathEmptyIterator.cs
- CompilerCollection.cs
- ErrorHandler.cs
- BindingElement.cs
- UnionCodeGroup.cs
- TypeUtils.cs
- NullableDecimalAverageAggregationOperator.cs
- FileUpload.cs
- selecteditemcollection.cs
- MonthChangedEventArgs.cs
- PieceNameHelper.cs
- Substitution.cs
- Regex.cs
- NonParentingControl.cs
- AsymmetricKeyExchangeFormatter.cs
- IOThreadTimer.cs
- RoutedEventHandlerInfo.cs
- XsltArgumentList.cs
- AuthenticationException.cs
- NavigationPropertyEmitter.cs
- SiteMapNodeItem.cs
- IdentityReference.cs
- VariableQuery.cs
- LingerOption.cs
- EntityTypeEmitter.cs
- followingsibling.cs
- AxisAngleRotation3D.cs
- MailSettingsSection.cs
- DeviceContexts.cs
- MappingSource.cs
- IPGlobalProperties.cs
- ForeignConstraint.cs
- ParentQuery.cs
- ViewSimplifier.cs
- OptimalTextSource.cs
- FormatterServices.cs
- Double.cs
- TokenBasedSet.cs
- SoundPlayer.cs
- AuthenticationManager.cs
- HttpStreamXmlDictionaryReader.cs
- EventSinkActivity.cs
- ZoneButton.cs
- OletxVolatileEnlistment.cs
- DocumentPageHost.cs
- UIElementAutomationPeer.cs
- BitConverter.cs
- SmiEventStream.cs
- ListBindingHelper.cs
- PageTheme.cs
- TextRangeEditTables.cs
- WebException.cs
- SourceChangedEventArgs.cs
- OdbcStatementHandle.cs
- FormViewDeleteEventArgs.cs
- PtsPage.cs
- ListViewInsertedEventArgs.cs
- EtwProvider.cs
- XmlCDATASection.cs
- DNS.cs
- RegexTree.cs
- ToolBarTray.cs
- StateDesigner.Helpers.cs
- OleDbMetaDataFactory.cs
- DataTableClearEvent.cs
- SqlTypeConverter.cs
- TransactionFlowBindingElement.cs
- ItemsPresenter.cs
- StylusDownEventArgs.cs
- WebHttpElement.cs
- PassportPrincipal.cs
- InputLanguageProfileNotifySink.cs
- DocumentGrid.cs
- XpsFilter.cs
- EntityDesignerBuildProvider.cs
- DefaultValueAttribute.cs
- DesignTimeData.cs
- QueryStringHandler.cs
- CommandLibraryHelper.cs
- WindowsListViewGroupSubsetLink.cs
- XpsTokenContext.cs
- ComplexObject.cs
- EntryWrittenEventArgs.cs
- WebPartCancelEventArgs.cs
- XmlIterators.cs
- HandlerBase.cs
- DynamicEndpoint.cs
- PropertyFilterAttribute.cs
- LightweightCodeGenerator.cs
- SpStreamWrapper.cs
- DataTemplate.cs