Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Controls / Expander.cs / 1 / Expander.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Windows; using System.Windows.Automation; using System.Windows.Automation.Peers; using System.Windows.Controls; using System.ComponentModel; using MS.Internal.KnownBoxes; namespace System.Windows.Controls { ////// Specifies the expanding direction of a expansion. /// public enum ExpandDirection { ////// Expander will expand to the down direction. /// Down = 0, ////// Expander will expand to the up direction. /// Up = 1, ////// Expander will expand to the left direction. /// Left = 2, ////// Expander will expand to the right direction. /// Right = 3, } ////// An Expander control allows a user to view a header and expand that /// header to see further details of the content, or to collapse the section /// up to the header to save space. /// [Localizability(LocalizationCategory.None, Readability = Readability.Unreadable)] // cannot be read & localized as string public class Expander : HeaderedContentControl { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors static Expander() { DefaultStyleKeyProperty.OverrideMetadata(typeof(Expander), new FrameworkPropertyMetadata(typeof(Expander))); _dType = DependencyObjectType.FromSystemTypeInternal(typeof(Expander)); IsTabStopProperty.OverrideMetadata(typeof(Expander), new FrameworkPropertyMetadata(BooleanBoxes.FalseBox)); } #endregion //-------------------------------------------------------------------- // // Public Properties // //------------------------------------------------------------------- #region Public Properties ////// ExpandDirection specifies to which direction the content will expand /// [Bindable(true), Category("Behavior")] public ExpandDirection ExpandDirection { get { return (ExpandDirection) GetValue(ExpandDirectionProperty); } set { SetValue(ExpandDirectionProperty, value); } } ////// The DependencyProperty for the ExpandDirection property. /// Default Value: ExpandDirection.Down /// public static readonly DependencyProperty ExpandDirectionProperty = DependencyProperty.Register( "ExpandDirection", typeof(ExpandDirection), typeof(Expander), new FrameworkPropertyMetadata( ExpandDirection.Down /* default value */, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault), new ValidateValueCallback(IsValidExpandDirection)); private static bool IsValidExpandDirection(object o) { ExpandDirection value = (ExpandDirection)o; return (value == ExpandDirection.Down || value == ExpandDirection.Left || value == ExpandDirection.Right || value == ExpandDirection.Up); } ////// The DependencyProperty for the IsExpanded property. /// Default Value: false /// public static readonly DependencyProperty IsExpandedProperty = DependencyProperty.Register( "IsExpanded", typeof(bool), typeof(Expander), new FrameworkPropertyMetadata( BooleanBoxes.FalseBox /* default value */, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Journal, new PropertyChangedCallback(OnIsExpandedChanged))); private static void OnIsExpandedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { Expander ep = (Expander) d; bool newValue = (bool) e.NewValue; // Fire accessibility event ExpanderAutomationPeer peer = UIElementAutomationPeer.FromElement(ep) as ExpanderAutomationPeer; if(peer != null) { peer.RaiseExpandCollapseAutomationEvent(!newValue, newValue); } if (newValue) { ep.OnExpanded(); } else { ep.OnCollapsed(); } } ////// IsExpanded indicates whether the expander is currently expanded. /// [Bindable(true), Category("Appearance")] public bool IsExpanded { get { return (bool) GetValue(IsExpandedProperty); } set { SetValue(IsExpandedProperty, BooleanBoxes.Box(value)); } } ////// Expanded event. /// public static readonly RoutedEvent ExpandedEvent = EventManager.RegisterRoutedEvent("Expanded", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(Expander) ); ////// Expanded event. It is fired when IsExpanded changed from false to true. /// public event RoutedEventHandler Expanded { add { AddHandler(ExpandedEvent, value); } remove { RemoveHandler(ExpandedEvent, value); } } ////// Collapsed event. /// public static readonly RoutedEvent CollapsedEvent = EventManager.RegisterRoutedEvent("Collapsed", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(Expander) ); ////// Collapsed event. It is fired when IsExpanded changed from true to false. /// public event RoutedEventHandler Collapsed { add { AddHandler(CollapsedEvent, value); } remove { RemoveHandler(CollapsedEvent, value); } } #endregion //-------------------------------------------------------------------- // // Protected Methods // //-------------------------------------------------------------------- #region Protected Methods ////// A virtual function that is called when the IsExpanded property is changed to true. /// Default behavior is to raise an ExpandedEvent. /// protected virtual void OnExpanded() { RoutedEventArgs args = new RoutedEventArgs(); args.RoutedEvent =(Expander.ExpandedEvent); args.Source=this; RaiseEvent(args); } ////// A virtual function that is called when the IsExpanded property is changed to false. /// Default behavior is to raise a CollapsedEvent. /// protected virtual void OnCollapsed() { RaiseEvent(new RoutedEventArgs(Expander.CollapsedEvent, this)); } #endregion #region Accessibility ////// Creates AutomationPeer ( protected override AutomationPeer OnCreateAutomationPeer() { return new ExpanderAutomationPeer(this); } #endregion //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields #endregion #region DTypeThemeStyleKey // Returns the DependencyObjectType for the registered ThemeStyleKey's default // value. Controls will override this method to return approriate types. internal override DependencyObjectType DTypeThemeStyleKey { get { return _dType; } } private static DependencyObjectType _dType; #endregion DTypeThemeStyleKey } } // 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
- ElementsClipboardData.cs
- Misc.cs
- IconBitmapDecoder.cs
- KnownBoxes.cs
- StrokeNodeEnumerator.cs
- OptimalBreakSession.cs
- DefinitionBase.cs
- StateMachineTimers.cs
- DbProviderFactoriesConfigurationHandler.cs
- CompilerErrorCollection.cs
- MarshalDirectiveException.cs
- SystemWebSectionGroup.cs
- DiscoveryRequestHandler.cs
- RequiredFieldValidator.cs
- QilVisitor.cs
- Container.cs
- XmlSchemaFacet.cs
- TextMessageEncoder.cs
- DateTimeSerializationSection.cs
- dataobject.cs
- BlockCollection.cs
- ManagementObjectCollection.cs
- QueryResponse.cs
- KeyGestureValueSerializer.cs
- DbModificationClause.cs
- XPathCompiler.cs
- TemplateControlBuildProvider.cs
- SqlCommandAsyncResult.cs
- XmlSchemaSimpleContent.cs
- CommandBindingCollection.cs
- TreeNodeSelectionProcessor.cs
- TransportManager.cs
- RenameRuleObjectDialog.Designer.cs
- ListArgumentProvider.cs
- HitTestWithGeometryDrawingContextWalker.cs
- Animatable.cs
- DiagnosticTraceRecords.cs
- IntSecurity.cs
- Root.cs
- tooltip.cs
- diagnosticsswitches.cs
- SqlParameterCollection.cs
- AgileSafeNativeMemoryHandle.cs
- NoneExcludedImageIndexConverter.cs
- QuaternionAnimationBase.cs
- Thread.cs
- ApplicationServiceHelper.cs
- RegionData.cs
- RuntimeEnvironment.cs
- MouseGestureValueSerializer.cs
- VectorAnimation.cs
- TypeTypeConverter.cs
- Deflater.cs
- SafeBitVector32.cs
- UnauthorizedAccessException.cs
- PolyQuadraticBezierSegmentFigureLogic.cs
- CompModSwitches.cs
- CollectionsUtil.cs
- FileLoadException.cs
- ScriptControlManager.cs
- DataGridViewImageColumn.cs
- MetadataArtifactLoader.cs
- ColumnClickEvent.cs
- TextClipboardData.cs
- ProjectionPlan.cs
- DocumentSequence.cs
- AtomContentProperty.cs
- CustomUserNameSecurityTokenAuthenticator.cs
- WebPartVerbCollection.cs
- DiscardableAttribute.cs
- ToolTipAutomationPeer.cs
- Cursors.cs
- EdmProviderManifest.cs
- Encoding.cs
- TextElementEnumerator.cs
- DigestComparer.cs
- TemplateBindingExpression.cs
- Rotation3D.cs
- DirectoryInfo.cs
- infer.cs
- IProvider.cs
- EraserBehavior.cs
- PartialCachingControl.cs
- HostingEnvironmentException.cs
- ObjectIDGenerator.cs
- QueryableFilterUserControl.cs
- IERequestCache.cs
- SectionInformation.cs
- StorageAssociationTypeMapping.cs
- TextEditorParagraphs.cs
- Brushes.cs
- Odbc32.cs
- ValueQuery.cs
- ConfigsHelper.cs
- ExpandSegment.cs
- FontUnitConverter.cs
- TextServicesManager.cs
- FileEnumerator.cs
- AvTraceFormat.cs
- PageContentAsyncResult.cs