Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / SizeChangedInfo.cs / 1305600 / SizeChangedInfo.cs
using System; namespace System.Windows { ////// The SizeChangedinfo class is used as a parameter to OnSizeRenderChanged. /// public class SizeChangedInfo { ////// Initializes a new instance of the SizeChangedinfo class. /// /// /// The element which size is changing. /// /// /// The size of the object before update. New size is element.RenderSize /// /// /// The flag indicating that width component of the size changed. Note that due to double math /// effects, the it may be (previousSize.Width != newSize.Width) and widthChanged = true. /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of /// the input parameters, but the overall scene is considered to be "the same" so no visible changes /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid /// invalidation of layout if the dimension didn't change. /// /// /// The flag indicating that height component of the size changed. Note that due to double math /// effects, the it may be (previousSize.Height != newSize.Height) and heightChanged = true. /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of /// the input parameters, but the overall scene is considered to be "the same" so no visible changes /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid /// invalidation of layout if the dimension didn't change. /// public SizeChangedInfo(UIElement element, Size previousSize, bool widthChanged, bool heightChanged) { _element = element; _previousSize = previousSize; _widthChanged = widthChanged; _heightChanged = heightChanged; } ////// Read-only access to the previous Size /// public Size PreviousSize { get { return _previousSize; } } ////// Read-only access to the new Size /// public Size NewSize { get { return _element.RenderSize; } } ////// Read-only access to the flag indicating that Width component of the size changed. /// Note that due to double math /// effects, the it may be (previousSize.Width != newSize.Width) and widthChanged = true. /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of /// the input parameters, but the overall scene is considered to be "the same" so no visible changes /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid /// invalidation of layout if the dimension didn't change. /// public bool WidthChanged { get { return _widthChanged; } } ////// Read-only access to the flag indicating that Height component of the size changed. /// Note that due to double math /// effects, the it may be (previousSize.Height != newSize.Height) and heightChanged = true. /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of /// the input parameters, but the overall scene is considered to be "the same" so no visible changes /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid /// invalidation of layout if the dimension didn't change. /// public bool HeightChanged { get { return _heightChanged; } } //this method is used by UIElement to "accumulate" several cosequitive layout updates //into the single args object cahced on UIElement. Since the SizeChanged is deferred event, //there could be several size changes before it will actually fire. internal void Update(bool widthChanged, bool heightChanged) { _widthChanged = _widthChanged | widthChanged; _heightChanged = _heightChanged | heightChanged; } internal UIElement Element { get { return _element; } } private UIElement _element; private Size _previousSize; private bool _widthChanged; private bool _heightChanged; internal SizeChangedInfo Next; } } // 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
- ReflectionUtil.cs
- ProtocolsConfigurationEntry.cs
- CompositionCommandSet.cs
- Graphics.cs
- CodeTypeDelegate.cs
- EventLogEntry.cs
- NotifyInputEventArgs.cs
- DataSourceXmlSubItemAttribute.cs
- JpegBitmapDecoder.cs
- GeneralTransform.cs
- DesignerWithHeader.cs
- ECDiffieHellmanCng.cs
- MarshalDirectiveException.cs
- BindingUtils.cs
- TextSelectionHelper.cs
- HostedHttpContext.cs
- ActiveXHelper.cs
- PrimitiveXmlSerializers.cs
- XmlSubtreeReader.cs
- Queue.cs
- SmtpException.cs
- _CommandStream.cs
- SatelliteContractVersionAttribute.cs
- DataGridViewCellValidatingEventArgs.cs
- EntryWrittenEventArgs.cs
- SR.cs
- MultipartContentParser.cs
- InheritablePropertyChangeInfo.cs
- RtfNavigator.cs
- SingleObjectCollection.cs
- CancelEventArgs.cs
- ChangeNode.cs
- Wildcard.cs
- SimpleApplicationHost.cs
- Transform3DCollection.cs
- DocumentSequence.cs
- Switch.cs
- ObjectFullSpanRewriter.cs
- SeekableReadStream.cs
- ThicknessAnimation.cs
- WebServiceEndpoint.cs
- StrongTypingException.cs
- DbProviderFactories.cs
- StrokeSerializer.cs
- CrossSiteScriptingValidation.cs
- GridViewRowPresenter.cs
- KnownIds.cs
- FixedDocument.cs
- TableLayoutSettings.cs
- StreamWriter.cs
- DefaultValueAttribute.cs
- Constraint.cs
- MulticastDelegate.cs
- TextRange.cs
- VScrollBar.cs
- OciHandle.cs
- SafeViewOfFileHandle.cs
- ImageSource.cs
- EntityDataSourceSelectedEventArgs.cs
- OperationPickerDialog.cs
- AssemblyResourceLoader.cs
- AtomServiceDocumentSerializer.cs
- User.cs
- ChildrenQuery.cs
- GeneratedContractType.cs
- OciHandle.cs
- SHA512CryptoServiceProvider.cs
- EmptyEnumerator.cs
- FlagsAttribute.cs
- HtmlTextArea.cs
- EntityDataSourceSelectingEventArgs.cs
- TcpActivation.cs
- HostingMessageProperty.cs
- PageContent.cs
- FilterEventArgs.cs
- WorkflowApplicationException.cs
- OraclePermission.cs
- AutomationPatternInfo.cs
- MetadataCache.cs
- DesignBindingEditor.cs
- ValueUnavailableException.cs
- OLEDB_Util.cs
- AppSettingsReader.cs
- EntityClientCacheEntry.cs
- SpecialFolderEnumConverter.cs
- CustomDictionarySources.cs
- GPStream.cs
- HtmlInputText.cs
- VectorAnimation.cs
- ConfigurationSectionCollection.cs
- TextMarkerSource.cs
- RuleValidation.cs
- WeakRefEnumerator.cs
- DataChangedEventManager.cs
- SingleAnimationUsingKeyFrames.cs
- DataServiceCollectionOfT.cs
- DetailsViewPageEventArgs.cs
- TreeNodeMouseHoverEvent.cs
- EdmItemError.cs
- RoleManagerModule.cs