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
- ImageAnimator.cs
- Pen.cs
- CodeRegionDirective.cs
- ReservationCollection.cs
- HttpApplicationFactory.cs
- BitmapEffectvisualstate.cs
- AddInSegmentDirectoryNotFoundException.cs
- UserControl.cs
- Matrix.cs
- versioninfo.cs
- UserControlBuildProvider.cs
- IntSumAggregationOperator.cs
- objectresult_tresulttype.cs
- WebPartConnectionsDisconnectVerb.cs
- PerfCounterSection.cs
- RectangleGeometry.cs
- ListControlConvertEventArgs.cs
- MdImport.cs
- DataTableReaderListener.cs
- DesignSurfaceEvent.cs
- MessageCredentialType.cs
- DataProtection.cs
- IMembershipProvider.cs
- CryptoHandle.cs
- TimeSpanValidator.cs
- ExpressionBindingCollection.cs
- ColumnMapCopier.cs
- XamlReaderHelper.cs
- PassportIdentity.cs
- LogicalExpr.cs
- InternalRelationshipCollection.cs
- DataKeyArray.cs
- XmlEnumAttribute.cs
- TextStore.cs
- HttpChannelBindingToken.cs
- XPathMessageFilterElementCollection.cs
- PenThread.cs
- ObjectStateEntryDbUpdatableDataRecord.cs
- BrushValueSerializer.cs
- baseaxisquery.cs
- SQLDateTimeStorage.cs
- RegexRunner.cs
- _AutoWebProxyScriptHelper.cs
- ExecutedRoutedEventArgs.cs
- MetadataItemCollectionFactory.cs
- UpdateProgress.cs
- XmlTextReader.cs
- LocationInfo.cs
- SplitContainer.cs
- TreeBuilderXamlTranslator.cs
- VisualStateManager.cs
- InArgumentConverter.cs
- TopClause.cs
- oledbmetadatacollectionnames.cs
- WebPartConnectVerb.cs
- CodeCommentStatement.cs
- GroupQuery.cs
- Timer.cs
- DataListItem.cs
- QuotedPrintableStream.cs
- HeaderFilter.cs
- TypeToken.cs
- DBParameter.cs
- TreeNodeBinding.cs
- OracleDataAdapter.cs
- Converter.cs
- PropertyGeneratedEventArgs.cs
- BaseTemplateBuildProvider.cs
- PropertyGeneratedEventArgs.cs
- SelectionPattern.cs
- ThrowHelper.cs
- TypeConverterBase.cs
- sqlcontext.cs
- HtmlWindow.cs
- WebPartTransformerAttribute.cs
- MdiWindowListStrip.cs
- ChtmlSelectionListAdapter.cs
- CrossAppDomainChannel.cs
- ImageKeyConverter.cs
- AVElementHelper.cs
- ConnectionManagementElementCollection.cs
- AmbientProperties.cs
- SqlCommandBuilder.cs
- TextDpi.cs
- MsmqAppDomainProtocolHandler.cs
- FilterElement.cs
- TimeSpanParse.cs
- CompoundFileIOPermission.cs
- webclient.cs
- ContextMenuAutomationPeer.cs
- WmlLinkAdapter.cs
- DesignTimeTemplateParser.cs
- BinaryFormatterWriter.cs
- AbandonedMutexException.cs
- AnchorEditor.cs
- SQlBooleanStorage.cs
- PartBasedPackageProperties.cs
- CodeSnippetTypeMember.cs
- UpdateException.cs
- PolicyValidationException.cs