Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Documents / Adorner.cs / 1 / Adorner.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Info needed to draw decorations on objects // // See spec at [....]/uis/Specs/AdornerLayer%20Spec.htm // // History: // 10/01/2003 : [....] - Created // 10/22/2003 : [....] - modified as per current spec // //--------------------------------------------------------------------------- using System; using System.Collections; using System.Windows.Data; using System.Windows.Media; using System.Windows.Input; using System.Windows.Threading; using MS.Internal; // DoubleUtil namespace System.Windows.Documents { ////// An Adorner is a UIElement "attached" to another UIElement. Adorners render /// on an AdornerLayer, which puts them higher in the Z-order than the element /// to which they are attached so they visually appear on top of that element. /// By default, the AdornerLayer positions an Adorner at the upper-left corner /// of the element it adorns. However, the AdornerLayer passes the Adorner its /// proposed transform, and the Adorner can modify that proposed transform as it /// wishes. /// /// Since Adorners are UIElements, they can respond to input events. /// public abstract class Adorner : FrameworkElement { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// Constructor /// protected Adorner(UIElement adornedElement) { if (adornedElement == null) throw new ArgumentNullException("adornedElement"); _adornedElement = adornedElement; _isClipEnabled = false; // Bug 1383424: We need to make sure our FlowDirection is always that of our adorned element. // Need to allow derived class constructor to execute first Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Normal, new DispatcherOperationCallback(CreateFlowDirectionBinding), this); } #endregion Constructors //------------------------------------------------------ // // Protected Methods // //----------------------------------------------------- #region Protected Methods ////// Measure adorner. Default behavior is to size to match the adorned element. /// protected override Size MeasureOverride(Size constraint) { Size desiredSize; desiredSize = new Size(AdornedElement.RenderSize.Width, AdornedElement.RenderSize.Height); int count = this.VisualChildrenCount; for (int i = 0; i < count; i++) { UIElement ch = this.GetVisualChild(i) as UIElement; if (ch != null) { ch.Measure(desiredSize); } } return desiredSize; } ////// Override of ///. /// null ////// Clip gets generated before transforms are applied, which means that /// Adorners can get inappropriately clipped if they draw outside of the bounding rect /// of the element they're adorning. This is against the Adorner philosophy of being /// topmost, so we choose to ignore clip instead. protected override Geometry GetLayoutClip(Size layoutSlotSize) { return null; } #endregion Protected Methods //------------------------------------------------------ // // Public Methods // //------------------------------------------------------ #region Public Methods ////// Adorners don't always want to be transformed in the same way as the elements they /// adorn. Adorners which adorn points, such as resize handles, want to be translated /// and rotated but not scaled. Adorners adorning an object, like a marquee, may want /// all transforms. This method is called by AdornerLayer to allow the adorner to /// filter out the transforms it doesn't want and return a new transform with just the /// transforms it wants applied. An adorner can also add an additional translation /// transform at this time, allowing it to be positioned somewhere other than the upper /// left corner of its adorned element. /// /// The transform applied to the object the adorner adorns ///Transform to apply to the adorner public virtual GeneralTransform GetDesiredTransform(GeneralTransform transform) { return transform; } #endregion Public Methods //----------------------------------------------------- // // Public Properties // //------------------------------------------------------ #region Public Properties ////// Gets or sets the clip of this Visual. /// Needed by AdornerLayer /// internal Geometry AdornerClip { get { return Clip; } set { Clip = value; } } ////// Gets or sets the transform of this Visual. /// Needed by AdornerLayer /// internal Transform AdornerTransform { get { return RenderTransform; } set { RenderTransform = value; } } ////// UIElement this Adorner adorns. /// public UIElement AdornedElement { get { return _adornedElement; } } ////// If set to true, the adorner will be clipped using the same clip geometry as the /// AdornedElement. This is expensive, and therefore should not normally be used. /// Defaults to false. /// public bool IsClipEnabled { get { return _isClipEnabled; } set { _isClipEnabled = value; InvalidateArrange(); AdornerLayer.GetAdornerLayer(_adornedElement).InvalidateArrange(); } } #endregion Public Properties //----------------------------------------------------- // // Private Methods // //----------------------------------------------------- #region Private Methods // Callback for binding the FlowDirection property. private static object CreateFlowDirectionBinding(object o) { Adorner adorner = (Adorner)o; Binding binding = new Binding("FlowDirection"); binding.Mode = BindingMode.OneWay; binding.Source = adorner.AdornedElement; adorner.SetBinding(FlowDirectionProperty, binding); return null; } ////// Says if the Adorner needs update based on the /// previously cached size if the AdornedElement. /// internal virtual bool NeedsUpdate(Size oldSize) { return !DoubleUtil.AreClose(AdornedElement.RenderSize, oldSize); } #endregion Private Methods //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ #region Private Fields private readonly UIElement _adornedElement; private bool _isClipEnabled; #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
- UriTemplatePathPartiallyEquivalentSet.cs
- DbConnectionFactory.cs
- LongValidatorAttribute.cs
- x509utils.cs
- ExternalCalls.cs
- TypeBuilderInstantiation.cs
- Directory.cs
- WebAdminConfigurationHelper.cs
- WebPartDisplayModeCancelEventArgs.cs
- ActiveXHelper.cs
- SoapClientMessage.cs
- SqlClientWrapperSmiStreamChars.cs
- ChannelManager.cs
- DataSourceHelper.cs
- TrustLevel.cs
- GiveFeedbackEventArgs.cs
- AccessText.cs
- OrCondition.cs
- LicFileLicenseProvider.cs
- ControlPropertyNameConverter.cs
- ControlValuePropertyAttribute.cs
- ContextMenuAutomationPeer.cs
- TextBoxRenderer.cs
- RSAPKCS1KeyExchangeDeformatter.cs
- GridView.cs
- Expressions.cs
- CellCreator.cs
- RemotingClientProxy.cs
- DataTableMapping.cs
- SystemBrushes.cs
- BaseComponentEditor.cs
- ListViewItemMouseHoverEvent.cs
- IdentityHolder.cs
- XPathAncestorIterator.cs
- BaseValidator.cs
- FillErrorEventArgs.cs
- ArrayEditor.cs
- Window.cs
- HttpBrowserCapabilitiesBase.cs
- SqlDataSourceStatusEventArgs.cs
- CompilerInfo.cs
- HttpListenerException.cs
- Control.cs
- EnumerableRowCollectionExtensions.cs
- DirectoryNotFoundException.cs
- CultureSpecificStringDictionary.cs
- EmbeddedObject.cs
- WorkflowNamespace.cs
- Assembly.cs
- Executor.cs
- FileIOPermission.cs
- dsa.cs
- CheckBoxFlatAdapter.cs
- ConvertTextFrag.cs
- PlanCompiler.cs
- MembershipAdapter.cs
- AuthenticationModuleElementCollection.cs
- BitSet.cs
- XmlSchemaSimpleContentRestriction.cs
- HTMLTagNameToTypeMapper.cs
- X500Name.cs
- SqlErrorCollection.cs
- ConnectionPoint.cs
- IndexOutOfRangeException.cs
- ResourcePool.cs
- XPathExpr.cs
- ServicesSection.cs
- TreeNodeSelectionProcessor.cs
- TypeDescriptionProvider.cs
- SiteMapDataSourceView.cs
- TransactionScope.cs
- CssTextWriter.cs
- LineGeometry.cs
- ScrollBar.cs
- ClientSideQueueItem.cs
- PeerCustomResolverSettings.cs
- DataObject.cs
- Processor.cs
- ExceptionList.cs
- MapPathBasedVirtualPathProvider.cs
- SignatureHelper.cs
- AsyncStreamReader.cs
- ProfessionalColorTable.cs
- basenumberconverter.cs
- Sql8ExpressionRewriter.cs
- serverconfig.cs
- PenLineJoinValidation.cs
- InvalidComObjectException.cs
- UnsafeNativeMethods.cs
- LocalIdKeyIdentifierClause.cs
- BaseUriHelper.cs
- ValidationError.cs
- ScriptReferenceEventArgs.cs
- HtmlControl.cs
- TokenBasedSet.cs
- HtmlMeta.cs
- Image.cs
- StandardCommandToolStripMenuItem.cs
- XmlSchemaRedefine.cs
- FontStretches.cs