Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Automation / Peers / GroupItemAutomationPeer.cs / 1477467 / GroupItemAutomationPeer.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.Data; using System.Windows.Interop; using System.Windows.Media; using MS.Internal; using MS.Win32; namespace System.Windows.Automation.Peers { /// public class GroupItemAutomationPeer : FrameworkElementAutomationPeer { /// public GroupItemAutomationPeer(GroupItem owner): base(owner) { } /// override protected string GetClassNameCore() { return "GroupItem"; } /// override protected AutomationControlType GetAutomationControlTypeCore() { return AutomationControlType.Group; } /// override protected bool IsOffscreenCore() { if (!Owner.IsVisible) return true; Rect boundingRect = CalculateVisibleBoundingRect(); return (boundingRect == Rect.Empty || boundingRect.Height == 0 || boundingRect.Width == 0); } /// protected override ListGetChildrenCore() { GroupItem owner = (GroupItem)Owner; ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(Owner); if (itemsControl != null) { ItemsControlAutomationPeer itemsControlAP = itemsControl.CreateAutomationPeer() as ItemsControlAutomationPeer; if (itemsControlAP != null) { ItemContainerGenerator generator = owner.Generator; if (generator != null) { IList items = generator.Items; List children = new List (items.Count); ItemPeersStorage oldChildren = _dataChildren; //cache the old ones for possible reuse _dataChildren = new ItemPeersStorage (); if (items.Count > 0) { foreach (object item in items) { CollectionViewGroup cvg = item as CollectionViewGroup; if (cvg != null) { GroupItem groupItem = generator.ContainerFromItem(item) as GroupItem; if (groupItem != null) { GroupItemAutomationPeer peer = groupItem.CreateAutomationPeer() as GroupItemAutomationPeer; if (peer != null) children.Add(peer); } } else { //try to reuse old peer if it exists ItemAutomationPeer peer = oldChildren[item]; //no old peer - create new one if (peer == null) peer = itemsControlAP.CreateItemAutomationPeerInternal(item); //perform hookup so the events sourced from wrapper peer are fired as if from the data item if (peer != null) { AutomationPeer wrapperPeer = peer.GetWrapperPeer(); if (wrapperPeer != null) { wrapperPeer.EventsSource = peer; if (peer.ChildrenValid && peer.Children == null && this.AncestorsInvalid) { peer.AncestorsInvalid = true; wrapperPeer.AncestorsInvalid = true; } } } //protection from indistinguishable items - for example, 2 strings with same value //this scenario does not work in ItemsControl however is not checked for. if (_dataChildren[item] == null) { children.Add(peer); _dataChildren[item] = peer; // Update ItemsControl cache too // ItemPeers needs to be updated because used in Selector and other ItemsControl subclasses to access item peers directly if (itemsControlAP.ItemPeers[item] == null) { itemsControlAP.ItemPeers[item] = peer; } } } } return children; } } } } return null; } private ItemPeersStorage _dataChildren = new ItemPeersStorage (); } } // 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
- GlyphCollection.cs
- HttpChannelHelper.cs
- Propagator.JoinPropagator.JoinPredicateVisitor.cs
- ScriptControlDescriptor.cs
- CheckableControlBaseAdapter.cs
- RenderData.cs
- DesignerActionHeaderItem.cs
- RelatedPropertyManager.cs
- DataBoundControlAdapter.cs
- DeferredElementTreeState.cs
- ToolboxCategoryItems.cs
- EventProviderWriter.cs
- InternalPolicyElement.cs
- ToolStripOverflow.cs
- ObjectStateEntryDbDataRecord.cs
- FontSource.cs
- RequestBringIntoViewEventArgs.cs
- ManifestSignatureInformation.cs
- CheckBoxField.cs
- ConstraintCollection.cs
- AnnotationElement.cs
- AuthorizationContext.cs
- _LocalDataStore.cs
- WebPageTraceListener.cs
- UnsafeMethods.cs
- MenuItemStyle.cs
- InlineCollection.cs
- Grant.cs
- GACIdentityPermission.cs
- recordstate.cs
- DbgCompiler.cs
- TextRunCache.cs
- _PooledStream.cs
- PointCollection.cs
- Calendar.cs
- Variable.cs
- MouseGestureValueSerializer.cs
- SafeProcessHandle.cs
- DetailsViewModeEventArgs.cs
- PingOptions.cs
- ISCIIEncoding.cs
- AutomationAttributeInfo.cs
- SelectedGridItemChangedEvent.cs
- ObjectAnimationUsingKeyFrames.cs
- ServiceDebugBehavior.cs
- DispatchWrapper.cs
- CompilerResults.cs
- FixedLineResult.cs
- Freezable.cs
- FixedTextContainer.cs
- SQLInt64.cs
- Triangle.cs
- ExpandableObjectConverter.cs
- XmlSerializableServices.cs
- BitmapEffectGroup.cs
- RemotingServices.cs
- MD5CryptoServiceProvider.cs
- WindowsSysHeader.cs
- DomainConstraint.cs
- PageClientProxyGenerator.cs
- VideoDrawing.cs
- Pkcs9Attribute.cs
- RequestTimeoutManager.cs
- SQLMoney.cs
- EmptyEnumerable.cs
- OutputCacheSettingsSection.cs
- MetadataPropertyCollection.cs
- NamespaceList.cs
- AnnouncementEndpoint.cs
- MobileFormsAuthentication.cs
- MessagePropertyFilter.cs
- MultiSelectRootGridEntry.cs
- FloatUtil.cs
- ThrowOnMultipleAssignment.cs
- BCryptSafeHandles.cs
- RawStylusInputCustomData.cs
- ThicknessAnimationBase.cs
- HttpCacheVaryByContentEncodings.cs
- WriterOutput.cs
- ToolStripMenuItem.cs
- OneOfElement.cs
- ActivationServices.cs
- DesignerForm.cs
- ObjectDisposedException.cs
- ObjectParameterCollection.cs
- Vector3DValueSerializer.cs
- LogWriteRestartAreaState.cs
- MultipartIdentifier.cs
- XmlQueryType.cs
- SessionParameter.cs
- OraclePermissionAttribute.cs
- AnchorEditor.cs
- XmlAttributes.cs
- FrameworkTemplate.cs
- CustomAttribute.cs
- FormsAuthenticationModule.cs
- ExceptionUtility.cs
- Bitmap.cs
- DoubleCollectionConverter.cs
- ComplexTypeEmitter.cs