Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Automation / Peers / MenuItemAutomationPeer.cs / 1 / MenuItemAutomationPeer.cs
using System; using System.Collections; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Security; using System.Text; using System.Windows; using System.Windows.Automation.Provider; using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows.Interop; using System.Windows.Media; using MS.Internal; using MS.Win32; namespace System.Windows.Automation.Peers { /// public class MenuItemAutomationPeer : FrameworkElementAutomationPeer, IExpandCollapseProvider, IInvokeProvider, IToggleProvider { /// public MenuItemAutomationPeer(MenuItem owner): base(owner) { } /// override protected string GetClassNameCore() { return "MenuItem"; } /// override protected AutomationControlType GetAutomationControlTypeCore() { return AutomationControlType.MenuItem; } /// override public object GetPattern(PatternInterface patternInterface) { object result = null; MenuItem owner = (MenuItem)Owner; if (patternInterface == PatternInterface.ExpandCollapse) { MenuItemRole role = owner.Role; if ( (role == MenuItemRole.TopLevelHeader || role == MenuItemRole.SubmenuHeader) && owner.HasItems) { result = this; } } else if (patternInterface == PatternInterface.Toggle) { if (owner.IsCheckable) { result = this; } } else if (patternInterface == PatternInterface.Invoke) { MenuItemRole role = owner.Role; if ( (role == MenuItemRole.TopLevelItem || role == MenuItemRole.SubmenuItem) && !owner.HasItems) { result = this; } } return result; } /// override protected string GetAccessKeyCore() { string accessKey = base.GetAccessKeyCore(); if (!string.IsNullOrEmpty(accessKey)) { MenuItem menuItem = (MenuItem)Owner; MenuItemRole role = menuItem.Role; if (role == MenuItemRole.TopLevelHeader || role == MenuItemRole.TopLevelItem) { accessKey = "Alt+" + accessKey; } } return accessKey; } // MenuItem cannot rely on the base which gets the visal children because submenu items are part of // other visual tree under a Popup. // We return the list of items containers if they are currently visible // In case MenuItem is not expanded we return null /// protected override ListGetChildrenCore() { List children = null; if (ExpandCollapseState.Expanded == ((IExpandCollapseProvider)this).ExpandCollapseState) { ItemsControl owner = (ItemsControl)Owner; ItemCollection items = owner.Items; if (items.Count > 0) { children = new List (items.Count); for (int i = 0; i < items.Count; i++) { UIElement uiElement = owner.ItemContainerGenerator.ContainerFromIndex(i) as UIElement; if (uiElement != null) { AutomationPeer peer = UIElementAutomationPeer.FromElement(uiElement); if (peer == null) peer = UIElementAutomationPeer.CreatePeerForElement(uiElement); children.Add(peer); } } } } return children; } /// void IExpandCollapseProvider.Expand() { if(!IsEnabled()) throw new ElementNotEnabledException(); MenuItem owner = (MenuItem)Owner; MenuItemRole role = owner.Role; if ( (role != MenuItemRole.TopLevelHeader && role != MenuItemRole.SubmenuHeader) || !owner.HasItems) { throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed)); } owner.OpenMenu(); } /// void IExpandCollapseProvider.Collapse() { if(!IsEnabled()) throw new ElementNotEnabledException(); MenuItem owner = (MenuItem)Owner; MenuItemRole role = owner.Role; if ( (role != MenuItemRole.TopLevelHeader && role != MenuItemRole.SubmenuHeader) || !owner.HasItems) { throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed)); } owner.IsSubmenuOpen = false; } /// ExpandCollapseState IExpandCollapseProvider.ExpandCollapseState { get { ExpandCollapseState result = ExpandCollapseState.Collapsed; MenuItem owner = (MenuItem)Owner; MenuItemRole role = owner.Role; if (role == MenuItemRole.TopLevelItem || role == MenuItemRole.SubmenuItem || !owner.HasItems) { result = ExpandCollapseState.LeafNode; } else if (owner.IsSubmenuOpen) { result = ExpandCollapseState.Expanded; } return result; } } /// void IInvokeProvider.Invoke() { if(!IsEnabled()) throw new ElementNotEnabledException(); MenuItem owner = (MenuItem)Owner; MenuItemRole role = owner.Role; if (role == MenuItemRole.TopLevelItem || role == MenuItemRole.SubmenuItem) { owner.ClickItem(); } else if (role == MenuItemRole.TopLevelHeader || role == MenuItemRole.SubmenuHeader) { owner.ClickHeader(); } } /// void IToggleProvider.Toggle() { if(!IsEnabled()) throw new ElementNotEnabledException(); MenuItem owner = (MenuItem)Owner; if (!owner.IsCheckable) { throw new InvalidOperationException(SR.Get(SRID.UIA_OperationCannotBePerformed)); } owner.IsChecked = !owner.IsChecked; } /// ToggleState IToggleProvider.ToggleState { get { MenuItem owner = (MenuItem)Owner; return owner.IsChecked ? ToggleState.On : ToggleState.Off; } } /// // [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.NoInlining)] internal void RaiseExpandCollapseAutomationEvent(bool oldValue, bool newValue) { RaisePropertyChangedEvent( ExpandCollapsePatternIdentifiers.ExpandCollapseStateProperty, oldValue ? ExpandCollapseState.Expanded : ExpandCollapseState.Collapsed, newValue ? ExpandCollapseState.Expanded : ExpandCollapseState.Collapsed); } // Return the base without the AccessKey character /// override protected string GetNameCore() { string result = base.GetNameCore(); if (!string.IsNullOrEmpty(result)) { MenuItem menuItem = (MenuItem)Owner; if (menuItem.Header is string) { return AccessText.RemoveAccessKeyMarker(result); } } return result; } } } // 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
- DataGridViewColumnConverter.cs
- DictionaryItemsCollection.cs
- StructureChangedEventArgs.cs
- DateTimeStorage.cs
- InteropAutomationProvider.cs
- XmlDocumentType.cs
- DataFormats.cs
- AudioBase.cs
- Mutex.cs
- Win32.cs
- BinaryObjectWriter.cs
- SmtpClient.cs
- ScriptingWebServicesSectionGroup.cs
- PocoPropertyAccessorStrategy.cs
- xmlsaver.cs
- GridViewColumnCollection.cs
- LOSFormatter.cs
- DictionaryEntry.cs
- ResourcePool.cs
- ClientConfigPaths.cs
- RenderContext.cs
- ResXResourceWriter.cs
- OleDbDataReader.cs
- ISAPIWorkerRequest.cs
- Exception.cs
- XmlElement.cs
- CanExecuteRoutedEventArgs.cs
- ObjectTypeMapping.cs
- PrimitiveCodeDomSerializer.cs
- TextRangeEditTables.cs
- Subset.cs
- Light.cs
- SizeAnimationBase.cs
- HttpPostLocalhostServerProtocol.cs
- Psha1DerivedKeyGeneratorHelper.cs
- HitTestParameters.cs
- ListBox.cs
- HtmlTableRowCollection.cs
- SQLMembershipProvider.cs
- Lease.cs
- BaseParaClient.cs
- VectorKeyFrameCollection.cs
- TrackPointCollection.cs
- MailWebEventProvider.cs
- XmlArrayItemAttribute.cs
- TextRunTypographyProperties.cs
- PointAnimationUsingPath.cs
- OracleCommandSet.cs
- EntityParameter.cs
- TextServicesCompartmentContext.cs
- HttpHeaderCollection.cs
- XsltException.cs
- WebServiceClientProxyGenerator.cs
- WizardPanel.cs
- StructuralObject.cs
- ConstantCheck.cs
- LoopExpression.cs
- ProjectionPathSegment.cs
- IDispatchConstantAttribute.cs
- AvtEvent.cs
- BitmapEffectOutputConnector.cs
- Trace.cs
- SchemaMapping.cs
- InteropTrackingRecord.cs
- Blend.cs
- LogLogRecord.cs
- AuthenticationManager.cs
- QuadTree.cs
- SolidBrush.cs
- BaseUriHelper.cs
- ColorPalette.cs
- BamlTreeNode.cs
- Monitor.cs
- ResolveResponseInfo.cs
- WindowsPen.cs
- CloseCryptoHandleRequest.cs
- DocumentViewerConstants.cs
- CheckBoxBaseAdapter.cs
- EntityModelBuildProvider.cs
- AuthorizationRuleCollection.cs
- WinInet.cs
- SchemaNames.cs
- TypeNameConverter.cs
- RuntimeArgumentHandle.cs
- PipelineModuleStepContainer.cs
- SessionIDManager.cs
- PointValueSerializer.cs
- BufferedStream.cs
- WsdlImporter.cs
- AttributeProviderAttribute.cs
- TypeInfo.cs
- ImageAttributes.cs
- diagnosticsswitches.cs
- DefaultSerializationProviderAttribute.cs
- Single.cs
- _SpnDictionary.cs
- ArcSegment.cs
- XmlObjectSerializerReadContextComplexJson.cs
- BindingExpressionBase.cs
- RelationshipEndMember.cs