Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Core / CSharp / MS / Internal / Automation / EventMap.cs / 1 / EventMap.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: // Accessibility event map classes are used to determine if, and how many // listeners there are for events and property changes. // // History: // 07/23/2003 : BrendanM Ported to WCP // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows; using System.Windows.Automation; using System.Windows.Automation.Peers; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace MS.Internal.Automation { // Manages the event map that is used to determine if there are Automation // clients interested in specific events. internal static class EventMap { private class EventInfo { internal EventInfo() { NumberOfListeners = 1; } internal int NumberOfListeners; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static bool IsKnownEvent(int id) { if ( id == AutomationElementIdentifiers.ToolTipOpenedEvent.Id || id == AutomationElementIdentifiers.ToolTipClosedEvent.Id || id == AutomationElementIdentifiers.MenuOpenedEvent.Id || id == AutomationElementIdentifiers.MenuClosedEvent.Id || id == AutomationElementIdentifiers.AutomationFocusChangedEvent.Id || id == InvokePatternIdentifiers.InvokedEvent.Id || id == SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementSelectedEvent.Id || id == SelectionPatternIdentifiers.InvalidatedEvent.Id || id == TextPatternIdentifiers.TextSelectionChangedEvent.Id || id == TextPatternIdentifiers.TextChangedEvent.Id || id == AutomationElementIdentifiers.AsyncContentLoadedEvent.Id || id == AutomationElementIdentifiers.AutomationPropertyChangedEvent.Id || id == AutomationElementIdentifiers.StructureChangedEvent.Id ) { return true; } return false; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static AutomationEvent GetRegisteredEventObjectHelper(AutomationEvents eventId) { AutomationEvent eventObject = null; switch(eventId) { case AutomationEvents.ToolTipOpened: eventObject = AutomationElementIdentifiers.ToolTipOpenedEvent; break; case AutomationEvents.ToolTipClosed: eventObject = AutomationElementIdentifiers.ToolTipClosedEvent; break; case AutomationEvents.MenuOpened: eventObject = AutomationElementIdentifiers.MenuOpenedEvent; break; case AutomationEvents.MenuClosed: eventObject = AutomationElementIdentifiers.MenuClosedEvent; break; case AutomationEvents.AutomationFocusChanged: eventObject = AutomationElementIdentifiers.AutomationFocusChangedEvent; break; case AutomationEvents.InvokePatternOnInvoked: eventObject = InvokePatternIdentifiers.InvokedEvent; break; case AutomationEvents.SelectionItemPatternOnElementAddedToSelection: eventObject = SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection: eventObject = SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementSelected: eventObject = SelectionItemPatternIdentifiers.ElementSelectedEvent; break; case AutomationEvents.SelectionPatternOnInvalidated: eventObject = SelectionPatternIdentifiers.InvalidatedEvent; break; case AutomationEvents.TextPatternOnTextSelectionChanged: eventObject = TextPatternIdentifiers.TextSelectionChangedEvent; break; case AutomationEvents.TextPatternOnTextChanged: eventObject = TextPatternIdentifiers.TextChangedEvent; break; case AutomationEvents.AsyncContentLoaded: eventObject = AutomationElementIdentifiers.AsyncContentLoadedEvent; break; case AutomationEvents.PropertyChanged: eventObject = AutomationElementIdentifiers.AutomationPropertyChangedEvent; break; case AutomationEvents.StructureChanged: eventObject = AutomationElementIdentifiers.StructureChangedEvent; break; default: throw new ArgumentException(SR.Get(SRID.Automation_InvalidEventId), "eventId"); } if (!_eventsTable.ContainsKey(eventObject.Id)) { eventObject = null; } return (eventObject); } internal static void AddEvent(int idEvent) { if (_eventsTable == null) _eventsTable = new Hashtable(20, .1f); if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; info.NumberOfListeners++; } // to avoid unbound memory allocations, // register only events that we recognize else if (IsKnownEvent(idEvent)) { _eventsTable[idEvent] = new EventInfo(); } } internal static void RemoveEvent(int idEvent) { if (_eventsTable != null) { // Decrement the count of listeners for this event if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; // Update or remove the entry based on remaining listeners info.NumberOfListeners--; if (info.NumberOfListeners <= 0) { _eventsTable.Remove(idEvent); // If no more entries exist kill the table if (_eventsTable.Count == 0) { _eventsTable = null; } } } } } // Unlike GetRegisteredEvent below, // HasRegisteredEvent does NOT cause automation DLLs loading internal static bool HasRegisteredEvent(AutomationEvents eventId) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId) != null); } return (false); } internal static AutomationEvent GetRegisteredEvent(AutomationEvents eventId) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId)); } return (null); } private static Hashtable _eventsTable; // key=event id, data=listener count } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: // Accessibility event map classes are used to determine if, and how many // listeners there are for events and property changes. // // History: // 07/23/2003 : BrendanM Ported to WCP // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows; using System.Windows.Automation; using System.Windows.Automation.Peers; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace MS.Internal.Automation { // Manages the event map that is used to determine if there are Automation // clients interested in specific events. internal static class EventMap { private class EventInfo { internal EventInfo() { NumberOfListeners = 1; } internal int NumberOfListeners; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static bool IsKnownEvent(int id) { if ( id == AutomationElementIdentifiers.ToolTipOpenedEvent.Id || id == AutomationElementIdentifiers.ToolTipClosedEvent.Id || id == AutomationElementIdentifiers.MenuOpenedEvent.Id || id == AutomationElementIdentifiers.MenuClosedEvent.Id || id == AutomationElementIdentifiers.AutomationFocusChangedEvent.Id || id == InvokePatternIdentifiers.InvokedEvent.Id || id == SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent.Id || id == SelectionItemPatternIdentifiers.ElementSelectedEvent.Id || id == SelectionPatternIdentifiers.InvalidatedEvent.Id || id == TextPatternIdentifiers.TextSelectionChangedEvent.Id || id == TextPatternIdentifiers.TextChangedEvent.Id || id == AutomationElementIdentifiers.AsyncContentLoadedEvent.Id || id == AutomationElementIdentifiers.AutomationPropertyChangedEvent.Id || id == AutomationElementIdentifiers.StructureChangedEvent.Id ) { return true; } return false; } // Never inline, as we don't want to unnecessarily link the automation DLL. [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] private static AutomationEvent GetRegisteredEventObjectHelper(AutomationEvents eventId) { AutomationEvent eventObject = null; switch(eventId) { case AutomationEvents.ToolTipOpened: eventObject = AutomationElementIdentifiers.ToolTipOpenedEvent; break; case AutomationEvents.ToolTipClosed: eventObject = AutomationElementIdentifiers.ToolTipClosedEvent; break; case AutomationEvents.MenuOpened: eventObject = AutomationElementIdentifiers.MenuOpenedEvent; break; case AutomationEvents.MenuClosed: eventObject = AutomationElementIdentifiers.MenuClosedEvent; break; case AutomationEvents.AutomationFocusChanged: eventObject = AutomationElementIdentifiers.AutomationFocusChangedEvent; break; case AutomationEvents.InvokePatternOnInvoked: eventObject = InvokePatternIdentifiers.InvokedEvent; break; case AutomationEvents.SelectionItemPatternOnElementAddedToSelection: eventObject = SelectionItemPatternIdentifiers.ElementAddedToSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection: eventObject = SelectionItemPatternIdentifiers.ElementRemovedFromSelectionEvent; break; case AutomationEvents.SelectionItemPatternOnElementSelected: eventObject = SelectionItemPatternIdentifiers.ElementSelectedEvent; break; case AutomationEvents.SelectionPatternOnInvalidated: eventObject = SelectionPatternIdentifiers.InvalidatedEvent; break; case AutomationEvents.TextPatternOnTextSelectionChanged: eventObject = TextPatternIdentifiers.TextSelectionChangedEvent; break; case AutomationEvents.TextPatternOnTextChanged: eventObject = TextPatternIdentifiers.TextChangedEvent; break; case AutomationEvents.AsyncContentLoaded: eventObject = AutomationElementIdentifiers.AsyncContentLoadedEvent; break; case AutomationEvents.PropertyChanged: eventObject = AutomationElementIdentifiers.AutomationPropertyChangedEvent; break; case AutomationEvents.StructureChanged: eventObject = AutomationElementIdentifiers.StructureChangedEvent; break; default: throw new ArgumentException(SR.Get(SRID.Automation_InvalidEventId), "eventId"); } if (!_eventsTable.ContainsKey(eventObject.Id)) { eventObject = null; } return (eventObject); } internal static void AddEvent(int idEvent) { if (_eventsTable == null) _eventsTable = new Hashtable(20, .1f); if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; info.NumberOfListeners++; } // to avoid unbound memory allocations, // register only events that we recognize else if (IsKnownEvent(idEvent)) { _eventsTable[idEvent] = new EventInfo(); } } internal static void RemoveEvent(int idEvent) { if (_eventsTable != null) { // Decrement the count of listeners for this event if (_eventsTable.ContainsKey(idEvent)) { EventInfo info = (EventInfo)_eventsTable[idEvent]; // Update or remove the entry based on remaining listeners info.NumberOfListeners--; if (info.NumberOfListeners <= 0) { _eventsTable.Remove(idEvent); // If no more entries exist kill the table if (_eventsTable.Count == 0) { _eventsTable = null; } } } } } // Unlike GetRegisteredEvent below, // HasRegisteredEvent does NOT cause automation DLLs loading internal static bool HasRegisteredEvent(AutomationEvents eventId) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId) != null); } return (false); } internal static AutomationEvent GetRegisteredEvent(AutomationEvents eventId) { if (_eventsTable != null && _eventsTable.Count != 0) { return (GetRegisteredEventObjectHelper(eventId)); } return (null); } private static Hashtable _eventsTable; // key=event id, data=listener count } } // 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
- SystemEvents.cs
- DbProviderSpecificTypePropertyAttribute.cs
- DefaultSection.cs
- OutputCacheEntry.cs
- MetadataArtifactLoader.cs
- RecognizedAudio.cs
- DocobjHost.cs
- DialogDivider.cs
- ScrollViewer.cs
- EventArgs.cs
- OAVariantLib.cs
- ServiceDescription.cs
- BackStopAuthenticationModule.cs
- MaskDescriptors.cs
- SafeLocalMemHandle.cs
- CellTreeNode.cs
- GenerateScriptTypeAttribute.cs
- WizardStepBase.cs
- DiffuseMaterial.cs
- StreamWriter.cs
- ParserContext.cs
- HwndTarget.cs
- TextBox.cs
- InputChannelBinder.cs
- FieldBuilder.cs
- PropertyPath.cs
- BitmapEffectRenderDataResource.cs
- TypeContext.cs
- MatrixIndependentAnimationStorage.cs
- Funcletizer.cs
- BitmapEffectInput.cs
- HttpWriter.cs
- LinkedList.cs
- HybridWebProxyFinder.cs
- EntityDataSourceChangedEventArgs.cs
- TagNameToTypeMapper.cs
- SendActivityDesignerTheme.cs
- _ListenerRequestStream.cs
- WorkflowServiceBehavior.cs
- CodeDOMUtility.cs
- ToolStripContentPanel.cs
- StyleHelper.cs
- ValueSerializerAttribute.cs
- ServicePoint.cs
- TimelineClockCollection.cs
- DocumentViewerHelper.cs
- OpenTypeLayoutCache.cs
- BamlLocalizableResource.cs
- DefaultParameterValueAttribute.cs
- RuntimeEnvironment.cs
- WindowsAltTab.cs
- HttpGetServerProtocol.cs
- CompiledXpathExpr.cs
- DataGridViewUtilities.cs
- PreApplicationStartMethodAttribute.cs
- ReachDocumentSequenceSerializer.cs
- Expr.cs
- ClassicBorderDecorator.cs
- JapaneseCalendar.cs
- DataTableMappingCollection.cs
- KnownAssembliesSet.cs
- Logging.cs
- OpenFileDialog.cs
- TransactionsSectionGroup.cs
- NativeMethods.cs
- Descriptor.cs
- FormsAuthenticationModule.cs
- ConfigurationSectionGroup.cs
- VirtualPathProvider.cs
- InstanceContextManager.cs
- PaperSource.cs
- DiscoveryDocumentLinksPattern.cs
- ToggleButtonAutomationPeer.cs
- WaitHandleCannotBeOpenedException.cs
- PropertyStore.cs
- MethodCallConverter.cs
- RemoteX509AsymmetricSecurityKey.cs
- DependencyPropertyAttribute.cs
- CorePropertiesFilter.cs
- DataGridViewRowPrePaintEventArgs.cs
- MetadataCache.cs
- CanonicalFontFamilyReference.cs
- SqlUtil.cs
- UniqueIdentifierService.cs
- WebChannelFactory.cs
- DesignerExtenders.cs
- LogicalExpr.cs
- ColorAnimationUsingKeyFrames.cs
- DesignSurfaceServiceContainer.cs
- DataSourceExpressionCollection.cs
- XmlMessageFormatter.cs
- CustomAssemblyResolver.cs
- Int16AnimationBase.cs
- ColorMatrix.cs
- Message.cs
- _ContextAwareResult.cs
- IndexedWhereQueryOperator.cs
- ProcessHost.cs
- UnsafeNetInfoNativeMethods.cs
- ComponentChangingEvent.cs