Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / UIAutomationClient / MS / Internal / Automation / WindowVisualStateTracker.cs / 1305600 / WindowVisualStateTracker.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Class used to track the visual appearance of Windows and make sure any events // are propogated to that new UI. // // History: // 01/05/2005 : Miw Created // //--------------------------------------------------------------------------- using System; using System.Windows.Automation; using MS.Win32; namespace MS.Internal.Automation { // Class used to track new UI appearing and make sure any events // are propogated to that new UI. internal class WindowVisualStateTracker : WinEventWrap { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors internal WindowVisualStateTracker() : base(new int[] { NativeMethods.EVENT_OBJECT_LOCATIONCHANGE }) { // Intentionally not setting the callback for the base WinEventWrap since the WinEventProc override // in this class calls RaiseEventInThisClientOnly to actually raise the event to the client. } #endregion Constructors //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods internal override void WinEventProc(int eventId, IntPtr hwnd, int idObject, int idChild, uint eventTime) { // ignore any event not pertaining directly to the window if (idObject != UnsafeNativeMethods.OBJID_WINDOW) { return; } // Ignore if this is a bogus hwnd (shouldn't happen) if (hwnd == IntPtr.Zero) { return; } OnStateChange(hwnd, idObject, idChild); } #endregion Internal Methods //------------------------------------------------------ // // Private Methods // //------------------------------------------------------ #region Private Methods private void OnStateChange(IntPtr hwnd, int idObject, int idChild) { NativeMethods.HWND nativeHwnd = NativeMethods.HWND.Cast(hwnd); // Ignore windows that have been destroyed if (!SafeNativeMethods.IsWindow(nativeHwnd)) { return; } AutomationElement rawEl = AutomationElement.FromHandle(hwnd); // Raise this event only for elements with the WindowPattern. object patternObject; if (!rawEl.TryGetCurrentPattern(WindowPattern.Pattern, out patternObject)) return; Object windowVisualState = rawEl.GetPatternPropertyValue(WindowPattern.WindowVisualStateProperty, false); // if has no state value just return if (!(windowVisualState is WindowVisualState)) { return; } WindowVisualState state = (WindowVisualState)windowVisualState; // Filter... avoid duplicate events if (hwnd == _lastHwnd && state == _lastState) { return; } AutomationPropertyChangedEventArgs e = new AutomationPropertyChangedEventArgs( WindowPattern.WindowVisualStateProperty, null, state); ClientEventManager.RaiseEventInThisClientOnly(AutomationElement.AutomationPropertyChangedEvent, rawEl, e); // save the last hwnd/rect for filtering out duplicates _lastHwnd = hwnd; _lastState = state; } #endregion Private Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields private WindowVisualState _lastState; // keep track of last visual state private IntPtr _lastHwnd; // and hwnd for dup checking #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
- AuthenticationException.cs
- ClonableStack.cs
- RegionInfo.cs
- ProcessHostConfigUtils.cs
- PropertyFilterAttribute.cs
- FlowSwitchLink.cs
- UIElementParagraph.cs
- BufferedReadStream.cs
- ParameterToken.cs
- WindowsHyperlink.cs
- TryExpression.cs
- Message.cs
- FileDialog_Vista_Interop.cs
- DbDataRecord.cs
- Comparer.cs
- DriveInfo.cs
- VoiceInfo.cs
- ExternalException.cs
- CollectionBase.cs
- BindingGroup.cs
- UpdateRecord.cs
- RegexCompilationInfo.cs
- SelectionChangedEventArgs.cs
- MultiBindingExpression.cs
- RedistVersionInfo.cs
- FocusTracker.cs
- RightsManagementLicense.cs
- SqlProviderServices.cs
- DependencyPropertyKey.cs
- SecurityMessageProperty.cs
- WebPartHelpVerb.cs
- SyndicationCategory.cs
- HitTestDrawingContextWalker.cs
- WebReferencesBuildProvider.cs
- RegisteredScript.cs
- AttributeXamlType.cs
- FlowDocumentFormatter.cs
- ObjectNotFoundException.cs
- UIElement3D.cs
- BaseAddressPrefixFilterElement.cs
- PersonalizationAdministration.cs
- SqlEnums.cs
- DataTrigger.cs
- BindingList.cs
- XmlBaseWriter.cs
- ExtentKey.cs
- SqlDataSourceStatusEventArgs.cs
- TrustLevelCollection.cs
- InternalsVisibleToAttribute.cs
- ADConnectionHelper.cs
- OdbcConnectionHandle.cs
- SystemUnicastIPAddressInformation.cs
- AuthorizationSection.cs
- ToolboxComponentsCreatedEventArgs.cs
- DataSourceControl.cs
- PersonalizationProviderCollection.cs
- XamlFilter.cs
- DataControlPagerLinkButton.cs
- TypeCodeDomSerializer.cs
- xml.cs
- OciLobLocator.cs
- OverflowException.cs
- DataSourceProvider.cs
- SendContent.cs
- RuleSettingsCollection.cs
- SectionInformation.cs
- XmlWriterSettings.cs
- ResourcesGenerator.cs
- StackSpiller.Bindings.cs
- ComPlusServiceLoader.cs
- CqlLexer.cs
- EncoderExceptionFallback.cs
- TypeUtils.cs
- xmlfixedPageInfo.cs
- SortQueryOperator.cs
- ControlIdConverter.cs
- PropertyMetadata.cs
- MaskInputRejectedEventArgs.cs
- EntitySetRetriever.cs
- OpacityConverter.cs
- CmsInterop.cs
- MissingMethodException.cs
- SqlResolver.cs
- ObjectStateFormatter.cs
- HandlerWithFactory.cs
- Substitution.cs
- BevelBitmapEffect.cs
- SafeEventLogWriteHandle.cs
- ExtendLockAsyncResult.cs
- AccessDataSource.cs
- AttributeCallbackBuilder.cs
- SQLMembershipProvider.cs
- ColumnMapVisitor.cs
- Types.cs
- DataGridViewCellCancelEventArgs.cs
- HtmlLink.cs
- EncryptedType.cs
- VersionedStreamOwner.cs
- DetailsViewPageEventArgs.cs
- WebFormDesignerActionService.cs