Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / Adorner.cs / 1305600 / Adorner.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Info needed to draw decorations on objects // // See spec at http://avalon/uis/Specs/AdornerLayer%20Spec.htm // // History: // 10/01/2003 : psarrett - Created // 10/22/2003 : psarrett - 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
- RtType.cs
- AppSecurityManager.cs
- SpeechEvent.cs
- UserControlParser.cs
- ParseHttpDate.cs
- EdmEntityTypeAttribute.cs
- ReadOnlyPropertyMetadata.cs
- APCustomTypeDescriptor.cs
- TimeSpanSecondsConverter.cs
- PageRequestManager.cs
- CustomValidator.cs
- ApplicationId.cs
- DataGridViewUtilities.cs
- StylusPlugInCollection.cs
- MSHTMLHostUtil.cs
- DataContractAttribute.cs
- IisTraceListener.cs
- Int32.cs
- ColorContext.cs
- ComplexPropertyEntry.cs
- NativeMethods.cs
- ChannelManager.cs
- RegexCode.cs
- WS2007FederationHttpBindingElement.cs
- SR.cs
- SelectionProviderWrapper.cs
- MainMenu.cs
- metadatamappinghashervisitor.cs
- AmbientValueAttribute.cs
- InfoCardMasterKey.cs
- GridView.cs
- EventSetter.cs
- WindowsGraphics2.cs
- AttributeXamlType.cs
- ImplicitInputBrush.cs
- glyphs.cs
- RegisteredHiddenField.cs
- SecurityPermission.cs
- WorkflowInstanceExtensionCollection.cs
- AlternateView.cs
- ToolboxCategory.cs
- VirtualDirectoryMapping.cs
- ReaderWriterLockWrapper.cs
- SamlNameIdentifierClaimResource.cs
- DataGridViewColumnDesigner.cs
- WebPartAuthorizationEventArgs.cs
- BaseCollection.cs
- XmlSubtreeReader.cs
- IISMapPath.cs
- VectorAnimationBase.cs
- BatchParser.cs
- LambdaCompiler.Logical.cs
- StringValidator.cs
- MdiWindowListItemConverter.cs
- Brush.cs
- latinshape.cs
- ipaddressinformationcollection.cs
- ExtensionQuery.cs
- UserControlParser.cs
- SerializerWriterEventHandlers.cs
- TextEffect.cs
- ImageDrawing.cs
- CommonDialog.cs
- CodeSnippetTypeMember.cs
- TargetException.cs
- GeometryCombineModeValidation.cs
- TreeViewImageIndexConverter.cs
- BitmapEffect.cs
- ToolStripSeparatorRenderEventArgs.cs
- ProfilePropertyNameValidator.cs
- TreeNodeStyle.cs
- ResourceDefaultValueAttribute.cs
- TreeViewHitTestInfo.cs
- UITypeEditor.cs
- X500Name.cs
- ProcessActivityTreeOptions.cs
- URLIdentityPermission.cs
- TextTreeRootTextBlock.cs
- ToolStripPanelRenderEventArgs.cs
- Encoder.cs
- HttpModulesSection.cs
- HttpRequest.cs
- DataControlLinkButton.cs
- HiddenFieldDesigner.cs
- TcpConnectionPool.cs
- AssertFilter.cs
- ListBox.cs
- SoapAttributes.cs
- WindowsSysHeader.cs
- EffectiveValueEntry.cs
- OleDbConnection.cs
- NumberSubstitution.cs
- Avt.cs
- Int64AnimationBase.cs
- XamlTreeBuilder.cs
- TreeViewHitTestInfo.cs
- UrlMappingCollection.cs
- ColumnReorderedEventArgs.cs
- BitmapVisualManager.cs
- OutputCacheModule.cs