Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / ResourcesChangeInfo.cs / 1 / ResourcesChangeInfo.cs
//---------------------------------------------------------------------------- // // File: ResourcesChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during a resources change tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; namespace System.Windows { ////// This is the data that is passed through the DescendentsWalker /// during a resources change tree-walk. /// internal struct ResourcesChangeInfo { #region Constructors ////// This constructor is used for notifying changes to individual /// entries in a ResourceDictionary /// internal ResourcesChangeInfo(object key) { _oldDictionaries = null; _newDictionaries = null; _key = key; _container = null; _flags = 0; } ////// This constructor is used for notifying changes in Application.Resources, /// [FE/FCE].Resources, ResourceDictionary.EndInit /// internal ResourcesChangeInfo(ResourceDictionary oldDictionary, ResourceDictionary newDictionary) { _oldDictionaries = null; if (oldDictionary != null) { _oldDictionaries = new List(1); _oldDictionaries.Add(oldDictionary); } _newDictionaries = null; if (newDictionary != null) { _newDictionaries = new List (1); _newDictionaries.Add(newDictionary); } _key = null; _container = null; _flags = 0; } /// /// This constructor is used for notifying changes in Style.Resources, /// Template.Resources, ThemeStyle.Resources /// internal ResourcesChangeInfo( ListoldDictionaries, List newDictionaries, bool isStyleResourcesChange, bool isTemplateResourcesChange, DependencyObject container) { _oldDictionaries = oldDictionaries; _newDictionaries = newDictionaries; _key = null; _container = container; _flags = 0; IsStyleResourcesChange = isStyleResourcesChange; IsTemplateResourcesChange = isTemplateResourcesChange; } #endregion Constructors #region Operations /// /// This is a static accessor for a ResourcesChangeInfo that is used /// for theme change notifications /// internal static ResourcesChangeInfo ThemeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsThemeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for tree change notifications /// internal static ResourcesChangeInfo TreeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsTreeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for system colors or settings change notifications /// internal static ResourcesChangeInfo SysColorsOrSettingsChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsSysColorsOrSettingsChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for any ResourceDictionary operations that we aren't able to provide /// the precise 'key that changed' information /// internal static ResourcesChangeInfo CatastrophicDictionaryChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsCatastrophicDictionaryChange = true; return info; } } // This flag is used to indicate that a theme change has occured internal bool IsThemeChange { get { return ReadPrivateFlag(PrivateFlags.IsThemeChange); } set { WritePrivateFlag(PrivateFlags.IsThemeChange, value); } } // This flag is used to indicate that a tree change has occured internal bool IsTreeChange { get { return ReadPrivateFlag(PrivateFlags.IsTreeChange); } set { WritePrivateFlag(PrivateFlags.IsTreeChange, value); } } // This flag is used to indicate that a style has changed internal bool IsStyleResourcesChange { get { return ReadPrivateFlag(PrivateFlags.IsStyleResourceChange); } set { WritePrivateFlag(PrivateFlags.IsStyleResourceChange, value); } } // This flag is used to indicate that this resource change was triggered from a Template change internal bool IsTemplateResourcesChange { get {return ReadPrivateFlag(PrivateFlags.IsTemplateResourceChange); } set { WritePrivateFlag(PrivateFlags.IsTemplateResourceChange, value); } } // This flag is used to indicate that a system color or settings change has occured internal bool IsSysColorsOrSettingsChange { get {return ReadPrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange); } set { WritePrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange, value); } } // This flag is used to indicate that a catastrophic dictionary change has occured internal bool IsCatastrophicDictionaryChange { get {return ReadPrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange); } set { WritePrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange, value); } } // This flag is used to indicate if the current operation is an effective add operation internal bool IsResourceAddOperation { get { return _key != null || (_newDictionaries != null && _newDictionaries.Count > 0); } } // This member is used to identify the container when a style change happens internal DependencyObject Container { get { return _container; } } // Says if either the old or the new dictionaries contain the given key internal bool Contains(object key, bool isImplicitStyleKey) { if (IsTreeChange || IsCatastrophicDictionaryChange) { return true; } else if (IsThemeChange || IsSysColorsOrSettingsChange) { // Implicit Styles are not fetched from the Themes. // So we do not need to respond to theme changes. // This is a performance optimization. return !isImplicitStyleKey; } Debug.Assert(_oldDictionaries != null || _newDictionaries != null || _key != null, "Must have a dictionary or a key that has changed"); if (_key != null) { if (Object.Equals(_key, key)) { return true; } } if (_oldDictionaries != null) { for (int i=0; i<_oldDictionaries.Count; i++) { if (_oldDictionaries[i].Contains(key)) { return true; } } } if (_newDictionaries != null) { for (int i=0; i<_newDictionaries.Count; i++) { if (_newDictionaries[i].Contains(key)) { return true; } } } return false; } #endregion Operations #region PrivateMethods private void WritePrivateFlag(PrivateFlags bit, bool value) { if (value) { _flags |= bit; } else { _flags &= ~bit; } } private bool ReadPrivateFlag(PrivateFlags bit) { return (_flags & bit) != 0; } #endregion PrivateMethods #region PrivateDataStructures private enum PrivateFlags : byte { IsThemeChange = 0x01, IsTreeChange = 0x02, IsStyleResourceChange = 0x04, IsTemplateResourceChange = 0x08, IsSysColorsOrSettingsChange = 0x10, IsCatastrophicDictionaryChange = 0x20, } #endregion PrivateDataStructures #region Data private List_oldDictionaries; private List _newDictionaries; private object _key; private DependencyObject _container; private PrivateFlags _flags; #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
- EntityClientCacheEntry.cs
- parserscommon.cs
- FixedSOMSemanticBox.cs
- WCFServiceClientProxyGenerator.cs
- SamlNameIdentifierClaimResource.cs
- SiteMapNodeItem.cs
- Span.cs
- HttpHandlerAction.cs
- AppSettingsReader.cs
- ConnectionConsumerAttribute.cs
- Base64Decoder.cs
- XPathBuilder.cs
- LayoutTable.cs
- SchemaElement.cs
- OleDbRowUpdatedEvent.cs
- EntitySqlQueryCacheEntry.cs
- FixUp.cs
- FixUp.cs
- UnicastIPAddressInformationCollection.cs
- DBCommand.cs
- XmlCDATASection.cs
- BitFlagsGenerator.cs
- StreamWriter.cs
- CodeExporter.cs
- CssClassPropertyAttribute.cs
- ImageKeyConverter.cs
- SkinBuilder.cs
- InitializationEventAttribute.cs
- NameSpaceExtractor.cs
- PrivilegedConfigurationManager.cs
- DateTimeOffsetStorage.cs
- TreeBuilderBamlTranslator.cs
- ExtenderControl.cs
- RoutedCommand.cs
- SourceInterpreter.cs
- SQLSingle.cs
- PriorityQueue.cs
- NetworkInformationPermission.cs
- HtmlInputPassword.cs
- CellCreator.cs
- HtmlUtf8RawTextWriter.cs
- AssemblyAssociatedContentFileAttribute.cs
- ThreadPool.cs
- ObjectContext.cs
- CodeTypeMember.cs
- FilterableAttribute.cs
- AudioStateChangedEventArgs.cs
- Vector3DKeyFrameCollection.cs
- KeyedCollection.cs
- FileFormatException.cs
- CodeExpressionRuleDeclaration.cs
- DocumentViewerHelper.cs
- DateTimeValueSerializerContext.cs
- EntityContainerEmitter.cs
- PageRanges.cs
- HtmlInputFile.cs
- Geometry3D.cs
- MetadataArtifactLoaderComposite.cs
- PerformanceCounterManager.cs
- NodeFunctions.cs
- Parameter.cs
- WindowsFormsDesignerOptionService.cs
- ParseElement.cs
- DesignBindingValueUIHandler.cs
- ProgressiveCrcCalculatingStream.cs
- FunctionImportMapping.cs
- XmlDataSourceView.cs
- SequentialOutput.cs
- Profiler.cs
- Hex.cs
- Style.cs
- SoapProcessingBehavior.cs
- OleDbPropertySetGuid.cs
- SubMenuStyle.cs
- RequestCachePolicyConverter.cs
- PriorityQueue.cs
- DocumentViewerBase.cs
- MediaScriptCommandRoutedEventArgs.cs
- BindingObserver.cs
- OdbcConnectionOpen.cs
- NullEntityWrapper.cs
- InplaceBitmapMetadataWriter.cs
- HideDisabledControlAdapter.cs
- ConstrainedDataObject.cs
- TCEAdapterGenerator.cs
- EnumValAlphaComparer.cs
- NativeRightsManagementAPIsStructures.cs
- unsafeIndexingFilterStream.cs
- FastEncoderWindow.cs
- HeaderedContentControl.cs
- PropertySegmentSerializationProvider.cs
- CompareValidator.cs
- TextAdaptor.cs
- HuffmanTree.cs
- nulltextnavigator.cs
- MouseCaptureWithinProperty.cs
- WebPartTracker.cs
- SpinWait.cs
- CssClassPropertyAttribute.cs
- EncoderNLS.cs