Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / Ink / HighContrastHelper.cs / 1305600 / HighContrastHelper.cs
//---------------------------------------------------------------------------- // // File: HighContrastHelper.cs // // Description: // A helper class for tracking the change of the system high contrast setting. // // Features: // // History: // 06/15/2005 waynezen: Created // // Copyright (C) 2001 by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Security; using System.Security.Permissions; using System.Windows; using System.Windows.Media; using System.Windows.Threading; namespace MS.Internal.Ink { ////// HighContrastCallback Classs - An abstract helper class /// internal abstract class HighContrastCallback { ////// TurnHighContrastOn /// /// internal abstract void TurnHighContrastOn(Color highContrastColor); ////// TurnHighContrastOff /// internal abstract void TurnHighContrastOff(); ////// Returns the dispatcher if the object is associated to a UIContext. /// internal abstract Dispatcher Dispatcher { get; } } ////// StylusEditingBehavior - a base class for all stylus related editing behaviors /// internal static class HighContrastHelper { //------------------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------------------- #region Constructors ////// Constructor /// static HighContrastHelper() { __highContrastCallbackList = new List(); __increaseCount = 0; } #endregion Constructors //-------------------------------------------------------------------------------- // // Internal Methods // //------------------------------------------------------------------------------- #region Internal Methods /// /// Register the weak references for HighContrastCallback /// /// internal static void RegisterHighContrastCallback(HighContrastCallback highContrastCallback) { lock ( __lock ) { int count = __highContrastCallbackList.Count; int i = 0; int j = 0; // Every 100 items, We go through the list to remove the references // which have been collected by GC. if ( __increaseCount > CleanTolerance ) { while ( i < count ) { WeakReference weakRef = __highContrastCallbackList[j]; if ( weakRef.IsAlive ) { j++; } else { // Remove the unavaliable reference from the list __highContrastCallbackList.RemoveAt(j); } i++; } // Reset the count __increaseCount = 0; } __highContrastCallbackList.Add(new WeakReference(highContrastCallback)); __increaseCount++; } } ////// The method is called from SystemResources.SystemThemeFilterMessage /// internal static void OnSettingChanged() { UpdateHighContrast(); } #endregion Internal Methods //-------------------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------------------- #region Private Methods ////// UpdateHighContrast which calls out all the registered callbacks. /// private static void UpdateHighContrast() { lock ( __lock ) { int count = __highContrastCallbackList.Count; int i = 0; int j = 0; // Now go through the list, // And we will notify the alive callbacks // or remove the references which have been collected by GC. while ( i < count ) { WeakReference weakRef = __highContrastCallbackList[j]; if ( weakRef.IsAlive ) { HighContrastCallback highContrastCallback = weakRef.Target as HighContrastCallback; if ( highContrastCallback.Dispatcher != null ) { highContrastCallback.Dispatcher.BeginInvoke(DispatcherPriority.Background, new UpdateHighContrastCallback(OnUpdateHighContrast), highContrastCallback); } else { OnUpdateHighContrast(highContrastCallback); } j++; } else { // Remove the dead ones __highContrastCallbackList.RemoveAt(j); } i++; } // Reset the count __increaseCount = 0; } } private delegate void UpdateHighContrastCallback(HighContrastCallback highContrastCallback); ////// Invoke the callback /// /// private static void OnUpdateHighContrast(HighContrastCallback highContrastCallback) { // Get the current setting. bool isHighContrast = SystemParameters.HighContrast; Color windowTextColor = SystemColors.WindowTextColor; if ( isHighContrast ) { highContrastCallback.TurnHighContrastOn(windowTextColor); } else { highContrastCallback.TurnHighContrastOff(); } } #endregion Private Methods //------------------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------------------- #region Private Fields private static object __lock = new object(); private static List__highContrastCallbackList; private static int __increaseCount; private const int CleanTolerance = 100; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // File: HighContrastHelper.cs // // Description: // A helper class for tracking the change of the system high contrast setting. // // Features: // // History: // 06/15/2005 waynezen: Created // // Copyright (C) 2001 by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Security; using System.Security.Permissions; using System.Windows; using System.Windows.Media; using System.Windows.Threading; namespace MS.Internal.Ink { /// /// HighContrastCallback Classs - An abstract helper class /// internal abstract class HighContrastCallback { ////// TurnHighContrastOn /// /// internal abstract void TurnHighContrastOn(Color highContrastColor); ////// TurnHighContrastOff /// internal abstract void TurnHighContrastOff(); ////// Returns the dispatcher if the object is associated to a UIContext. /// internal abstract Dispatcher Dispatcher { get; } } ////// StylusEditingBehavior - a base class for all stylus related editing behaviors /// internal static class HighContrastHelper { //------------------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------------------- #region Constructors ////// Constructor /// static HighContrastHelper() { __highContrastCallbackList = new List(); __increaseCount = 0; } #endregion Constructors //-------------------------------------------------------------------------------- // // Internal Methods // //------------------------------------------------------------------------------- #region Internal Methods /// /// Register the weak references for HighContrastCallback /// /// internal static void RegisterHighContrastCallback(HighContrastCallback highContrastCallback) { lock ( __lock ) { int count = __highContrastCallbackList.Count; int i = 0; int j = 0; // Every 100 items, We go through the list to remove the references // which have been collected by GC. if ( __increaseCount > CleanTolerance ) { while ( i < count ) { WeakReference weakRef = __highContrastCallbackList[j]; if ( weakRef.IsAlive ) { j++; } else { // Remove the unavaliable reference from the list __highContrastCallbackList.RemoveAt(j); } i++; } // Reset the count __increaseCount = 0; } __highContrastCallbackList.Add(new WeakReference(highContrastCallback)); __increaseCount++; } } ////// The method is called from SystemResources.SystemThemeFilterMessage /// internal static void OnSettingChanged() { UpdateHighContrast(); } #endregion Internal Methods //-------------------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------------------- #region Private Methods ////// UpdateHighContrast which calls out all the registered callbacks. /// private static void UpdateHighContrast() { lock ( __lock ) { int count = __highContrastCallbackList.Count; int i = 0; int j = 0; // Now go through the list, // And we will notify the alive callbacks // or remove the references which have been collected by GC. while ( i < count ) { WeakReference weakRef = __highContrastCallbackList[j]; if ( weakRef.IsAlive ) { HighContrastCallback highContrastCallback = weakRef.Target as HighContrastCallback; if ( highContrastCallback.Dispatcher != null ) { highContrastCallback.Dispatcher.BeginInvoke(DispatcherPriority.Background, new UpdateHighContrastCallback(OnUpdateHighContrast), highContrastCallback); } else { OnUpdateHighContrast(highContrastCallback); } j++; } else { // Remove the dead ones __highContrastCallbackList.RemoveAt(j); } i++; } // Reset the count __increaseCount = 0; } } private delegate void UpdateHighContrastCallback(HighContrastCallback highContrastCallback); ////// Invoke the callback /// /// private static void OnUpdateHighContrast(HighContrastCallback highContrastCallback) { // Get the current setting. bool isHighContrast = SystemParameters.HighContrast; Color windowTextColor = SystemColors.WindowTextColor; if ( isHighContrast ) { highContrastCallback.TurnHighContrastOn(windowTextColor); } else { highContrastCallback.TurnHighContrastOff(); } } #endregion Private Methods //------------------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------------------- #region Private Fields private static object __lock = new object(); private static List__highContrastCallbackList; private static int __increaseCount; private const int CleanTolerance = 100; #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
- XdrBuilder.cs
- Executor.cs
- ByteBufferPool.cs
- SerialReceived.cs
- DataServiceQuery.cs
- WebEvents.cs
- ReadContentAsBinaryHelper.cs
- ProgressBarHighlightConverter.cs
- ParentUndoUnit.cs
- CodeDOMProvider.cs
- DataTable.cs
- XmlDocumentType.cs
- NameValueFileSectionHandler.cs
- TableLayoutPanelResizeGlyph.cs
- DynamicResourceExtensionConverter.cs
- ToolStripPanelRow.cs
- CodeNamespaceImportCollection.cs
- AssemblyCache.cs
- MessageDesigner.cs
- SqlDataSourceFilteringEventArgs.cs
- NamespaceQuery.cs
- MobileCapabilities.cs
- RootProfilePropertySettingsCollection.cs
- documentsequencetextcontainer.cs
- UiaCoreProviderApi.cs
- ResourceDefaultValueAttribute.cs
- CodeGenHelper.cs
- TemplateNameScope.cs
- PackageRelationship.cs
- EnumerableValidator.cs
- EditingMode.cs
- WorkflowRuntime.cs
- ValueUtilsSmi.cs
- ClientCultureInfo.cs
- Translator.cs
- DataGridViewRowsRemovedEventArgs.cs
- cookie.cs
- DefaultPrintController.cs
- VoiceObjectToken.cs
- SequentialOutput.cs
- TextTreeTextBlock.cs
- HebrewNumber.cs
- PropertyPathWorker.cs
- CollectionViewGroupInternal.cs
- ISessionStateStore.cs
- EmitterCache.cs
- RankException.cs
- Compress.cs
- SerializerProvider.cs
- Validator.cs
- AdCreatedEventArgs.cs
- ThaiBuddhistCalendar.cs
- ComplexType.cs
- BuildManager.cs
- DataTemplateKey.cs
- WebPartExportVerb.cs
- ProcessStartInfo.cs
- SystemInfo.cs
- BitmapDecoder.cs
- SignatureDescription.cs
- TemplateBuilder.cs
- BooleanSwitch.cs
- ListViewTableRow.cs
- StorageFunctionMapping.cs
- BitmapVisualManager.cs
- SafeIUnknown.cs
- TagMapInfo.cs
- DirectionalLight.cs
- HtmlEmptyTagControlBuilder.cs
- CodeCastExpression.cs
- MemoryResponseElement.cs
- FormsAuthenticationModule.cs
- TableSectionStyle.cs
- CaseCqlBlock.cs
- DbMetaDataCollectionNames.cs
- TreeWalkHelper.cs
- DependencyPropertyHelper.cs
- HtmlControlDesigner.cs
- InternalUserCancelledException.cs
- AspNetSynchronizationContext.cs
- ConstraintConverter.cs
- OSFeature.cs
- TypeConstant.cs
- ServiceOperation.cs
- Button.cs
- FormParameter.cs
- RecordManager.cs
- SplitterPanelDesigner.cs
- hresults.cs
- HttpModule.cs
- SmiEventSink_Default.cs
- Environment.cs
- SmtpDigestAuthenticationModule.cs
- AspNetSynchronizationContext.cs
- CurrencyManager.cs
- RowTypeElement.cs
- FormViewPagerRow.cs
- DataGridItemEventArgs.cs
- XmlCDATASection.cs
- SoapMessage.cs