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
- EventOpcode.cs
- Activity.cs
- TimeSpanOrInfiniteConverter.cs
- WindowsStartMenu.cs
- XMLDiffLoader.cs
- ProcessHostServerConfig.cs
- SymLanguageVendor.cs
- MDIControlStrip.cs
- HttpWebRequestElement.cs
- DataGridColumnReorderingEventArgs.cs
- TextDecoration.cs
- SharedStatics.cs
- PlanCompiler.cs
- ResourceDictionary.cs
- KeyBinding.cs
- SqlBulkCopy.cs
- TheQuery.cs
- ExpressionBuilder.cs
- SamlAuthorityBinding.cs
- DrawingContextWalker.cs
- HttpWebResponse.cs
- _ListenerAsyncResult.cs
- WindowsIdentity.cs
- ForwardPositionQuery.cs
- PublishLicense.cs
- IRCollection.cs
- SourceElementsCollection.cs
- PinnedBufferMemoryStream.cs
- NavigationHelper.cs
- XamlSerializerUtil.cs
- AssemblyBuilderData.cs
- Region.cs
- Misc.cs
- CollectionViewSource.cs
- NamespaceList.cs
- IssuanceLicense.cs
- CodeArgumentReferenceExpression.cs
- DependencyObjectProvider.cs
- ContractMapping.cs
- TreeBuilder.cs
- OracleString.cs
- ClientSponsor.cs
- LoginNameDesigner.cs
- ObjectDataSource.cs
- EmptyStringExpandableObjectConverter.cs
- WhitespaceRule.cs
- ConfigXmlElement.cs
- TransactionManager.cs
- PocoEntityKeyStrategy.cs
- SecUtil.cs
- ShaderEffect.cs
- AddInProcess.cs
- ISAPIWorkerRequest.cs
- ErrorProvider.cs
- WpfPayload.cs
- SqlMethodCallConverter.cs
- WmlFormAdapter.cs
- AssociationTypeEmitter.cs
- WebPartUserCapability.cs
- GeneralTransform.cs
- ArrayConverter.cs
- XPathBinder.cs
- SizeF.cs
- EncodingInfo.cs
- CodeEntryPointMethod.cs
- WebPartVerbCollection.cs
- xdrvalidator.cs
- NumberAction.cs
- UInt64Storage.cs
- RequestSecurityToken.cs
- ChannelFactory.cs
- LogicalTreeHelper.cs
- _SecureChannel.cs
- Expander.cs
- SEHException.cs
- ResourceManagerWrapper.cs
- TemplateKeyConverter.cs
- UniformGrid.cs
- EventListener.cs
- AssemblyAssociatedContentFileAttribute.cs
- InputManager.cs
- FilterQuery.cs
- Vector3DAnimation.cs
- Throw.cs
- WsdlContractConversionContext.cs
- FontNamesConverter.cs
- DataServiceRequest.cs
- SignatureDescription.cs
- EntityContainer.cs
- QilLoop.cs
- PixelShader.cs
- HttpCacheParams.cs
- DataGridViewControlCollection.cs
- XsltInput.cs
- SubtreeProcessor.cs
- cookie.cs
- FamilyTypeface.cs
- StrokeNodeOperations.cs
- WindowsListViewGroupHelper.cs
- BrowserDefinitionCollection.cs