Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / DrawingVisual.cs / 1305600 / DrawingVisual.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001 // // File: DrawingVisual.cs //----------------------------------------------------------------------------- using System; using System.Windows.Threading; using System.Windows.Media; using System.Windows.Media.Composition; using System.Diagnostics; using System.Collections.Generic; using MS.Internal; using MS.Win32; using System.Resources; using System.Runtime.InteropServices; namespace System.Windows.Media { ////// A DrawingVisual is a Visual that can be used to render Vector graphics on the screen. /// The content is persistet by the System. /// public class DrawingVisual : ContainerVisual { // bbox in inner coordinate space. Note that this bbox does not // contain the childrens extent. IDrawingContent _content; ////// HitTestCore implements precise hit testing against render contents /// protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters) { if (hitTestParameters == null) { throw new ArgumentNullException("hitTestParameters"); } if (_content != null) { if (_content.HitTestPoint(hitTestParameters.HitPoint)) { return new PointHitTestResult(this, hitTestParameters.HitPoint); } } return null; } ////// HitTestCore implements precise hit testing against render contents /// protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters) { if (hitTestParameters == null) { throw new ArgumentNullException("hitTestParameters"); } if ((_content != null) && GetHitTestBounds().IntersectsWith(hitTestParameters.Bounds)) { IntersectionDetail intersectionDetail; intersectionDetail = _content.HitTestGeometry(hitTestParameters.InternalHitGeometry); Debug.Assert(intersectionDetail != IntersectionDetail.NotCalculated); if (intersectionDetail != IntersectionDetail.Empty) { return new GeometryHitTestResult(this, intersectionDetail); } } return null; } ////// Opens the DrawingVisual for rendering. The returned DrawingContext can be used to /// render into the DrawingVisual. /// public DrawingContext RenderOpen() { VerifyAPIReadWrite(); return new VisualDrawingContext(this); } ////// Called from the DrawingContext when the DrawingContext is closed. /// internal override void RenderClose(IDrawingContent newContent) { IDrawingContent oldContent; // // First cleanup the old content and the state associate with this node // related to it's content. // oldContent = _content; _content = null; if (oldContent != null) { // // Remove the notification handlers. // oldContent.PropagateChangedHandler(ContentsChangedHandler, false /* remove */); // // Disconnect the old content from this visual. // DisconnectAttachedResource( VisualProxyFlags.IsContentConnected, ((DUCE.IResource)oldContent)); } // // Prepare the new content. // if (newContent != null) { // Propagate notification handlers. newContent.PropagateChangedHandler(ContentsChangedHandler, true /* adding */); } _content = newContent; // // Mark the visual dirty on all channels and propagate // the flags up the parent chain. // SetFlagsOnAllChannels(true, VisualProxyFlags.IsContentDirty); PropagateFlags( this, VisualFlags.IsSubtreeDirtyForPrecompute, VisualProxyFlags.IsSubtreeDirtyForRender); } ////// Overriding this function to release DUCE resources during Dispose and during removal of a subtree. /// internal override void FreeContent(DUCE.Channel channel) { Debug.Assert(_proxy.IsOnChannel(channel)); if (_content != null) { if (CheckFlagsAnd(channel, VisualProxyFlags.IsContentConnected)) { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), DUCE.ResourceHandle.Null, channel); SetFlags( channel, false, VisualProxyFlags.IsContentConnected); ((DUCE.IResource)_content).ReleaseOnChannel(channel); } } // Call the base method too base.FreeContent(channel); } ////// Returns the bounding box of the content. /// internal override Rect GetContentBounds() { if (_content != null) { Rect resultRect = Rect.Empty; MediaContext mediaContext = MediaContext.From(Dispatcher); BoundsDrawingContextWalker ctx = mediaContext.AcquireBoundsDrawingContextWalker(); resultRect = _content.GetContentBounds(ctx); mediaContext.ReleaseBoundsDrawingContextWalker(ctx); return resultRect; } else { return Rect.Empty; } } ////// WalkContent - method which walks the content (if present) and calls out to the /// supplied DrawingContextWalker. /// /// /// DrawingContextWalker - the target of the calls which occur during /// the content walk. /// internal void WalkContent(DrawingContextWalker walker) { VerifyAPIReadOnly(); if (_content != null) { _content.WalkContent(walker); } } ////// RenderContent is implemented by derived classes to hook up their /// content. The implementer of this function can assert that the _hCompNode /// is valid on a channel when the function is executed. /// internal override void RenderContent(RenderContext ctx, bool isOnChannel) { DUCE.Channel channel = ctx.Channel; Debug.Assert(!CheckFlagsAnd(channel, VisualProxyFlags.IsContentConnected)); Debug.Assert(_proxy.IsOnChannel(channel)); // // Create the content on the channel. // if (_content != null) { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), ((DUCE.IResource)_content).AddRefOnChannel(channel), channel); SetFlags( channel, true, VisualProxyFlags.IsContentConnected); } else if (isOnChannel) /*_content == null*/ { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), DUCE.ResourceHandle.Null, channel); } } ////// GetDrawing - Returns the drawing content of this Visual. /// ////// Changes to this DrawingGroup will not be propagated to the Visual's content. /// This method is called by both the Drawing property, and VisualTreeHelper.GetDrawing() /// internal override DrawingGroup GetDrawing() { // VerifyAPIReadOnly(); DrawingGroup drawingGroupContent = null; // Convert our content to a DrawingGroup, if content exists if (_content != null) { drawingGroupContent = DrawingServices.DrawingGroupFromRenderData((RenderData) _content); } return drawingGroupContent; } ////// Drawing - Returns the drawing content of this Visual. /// ////// Changes to this DrawingGroup will not propagated to the Visual's content. /// public DrawingGroup Drawing { get { return GetDrawing(); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2001 // // File: DrawingVisual.cs //----------------------------------------------------------------------------- using System; using System.Windows.Threading; using System.Windows.Media; using System.Windows.Media.Composition; using System.Diagnostics; using System.Collections.Generic; using MS.Internal; using MS.Win32; using System.Resources; using System.Runtime.InteropServices; namespace System.Windows.Media { ////// A DrawingVisual is a Visual that can be used to render Vector graphics on the screen. /// The content is persistet by the System. /// public class DrawingVisual : ContainerVisual { // bbox in inner coordinate space. Note that this bbox does not // contain the childrens extent. IDrawingContent _content; ////// HitTestCore implements precise hit testing against render contents /// protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters) { if (hitTestParameters == null) { throw new ArgumentNullException("hitTestParameters"); } if (_content != null) { if (_content.HitTestPoint(hitTestParameters.HitPoint)) { return new PointHitTestResult(this, hitTestParameters.HitPoint); } } return null; } ////// HitTestCore implements precise hit testing against render contents /// protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters) { if (hitTestParameters == null) { throw new ArgumentNullException("hitTestParameters"); } if ((_content != null) && GetHitTestBounds().IntersectsWith(hitTestParameters.Bounds)) { IntersectionDetail intersectionDetail; intersectionDetail = _content.HitTestGeometry(hitTestParameters.InternalHitGeometry); Debug.Assert(intersectionDetail != IntersectionDetail.NotCalculated); if (intersectionDetail != IntersectionDetail.Empty) { return new GeometryHitTestResult(this, intersectionDetail); } } return null; } ////// Opens the DrawingVisual for rendering. The returned DrawingContext can be used to /// render into the DrawingVisual. /// public DrawingContext RenderOpen() { VerifyAPIReadWrite(); return new VisualDrawingContext(this); } ////// Called from the DrawingContext when the DrawingContext is closed. /// internal override void RenderClose(IDrawingContent newContent) { IDrawingContent oldContent; // // First cleanup the old content and the state associate with this node // related to it's content. // oldContent = _content; _content = null; if (oldContent != null) { // // Remove the notification handlers. // oldContent.PropagateChangedHandler(ContentsChangedHandler, false /* remove */); // // Disconnect the old content from this visual. // DisconnectAttachedResource( VisualProxyFlags.IsContentConnected, ((DUCE.IResource)oldContent)); } // // Prepare the new content. // if (newContent != null) { // Propagate notification handlers. newContent.PropagateChangedHandler(ContentsChangedHandler, true /* adding */); } _content = newContent; // // Mark the visual dirty on all channels and propagate // the flags up the parent chain. // SetFlagsOnAllChannels(true, VisualProxyFlags.IsContentDirty); PropagateFlags( this, VisualFlags.IsSubtreeDirtyForPrecompute, VisualProxyFlags.IsSubtreeDirtyForRender); } ////// Overriding this function to release DUCE resources during Dispose and during removal of a subtree. /// internal override void FreeContent(DUCE.Channel channel) { Debug.Assert(_proxy.IsOnChannel(channel)); if (_content != null) { if (CheckFlagsAnd(channel, VisualProxyFlags.IsContentConnected)) { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), DUCE.ResourceHandle.Null, channel); SetFlags( channel, false, VisualProxyFlags.IsContentConnected); ((DUCE.IResource)_content).ReleaseOnChannel(channel); } } // Call the base method too base.FreeContent(channel); } ////// Returns the bounding box of the content. /// internal override Rect GetContentBounds() { if (_content != null) { Rect resultRect = Rect.Empty; MediaContext mediaContext = MediaContext.From(Dispatcher); BoundsDrawingContextWalker ctx = mediaContext.AcquireBoundsDrawingContextWalker(); resultRect = _content.GetContentBounds(ctx); mediaContext.ReleaseBoundsDrawingContextWalker(ctx); return resultRect; } else { return Rect.Empty; } } ////// WalkContent - method which walks the content (if present) and calls out to the /// supplied DrawingContextWalker. /// /// /// DrawingContextWalker - the target of the calls which occur during /// the content walk. /// internal void WalkContent(DrawingContextWalker walker) { VerifyAPIReadOnly(); if (_content != null) { _content.WalkContent(walker); } } ////// RenderContent is implemented by derived classes to hook up their /// content. The implementer of this function can assert that the _hCompNode /// is valid on a channel when the function is executed. /// internal override void RenderContent(RenderContext ctx, bool isOnChannel) { DUCE.Channel channel = ctx.Channel; Debug.Assert(!CheckFlagsAnd(channel, VisualProxyFlags.IsContentConnected)); Debug.Assert(_proxy.IsOnChannel(channel)); // // Create the content on the channel. // if (_content != null) { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), ((DUCE.IResource)_content).AddRefOnChannel(channel), channel); SetFlags( channel, true, VisualProxyFlags.IsContentConnected); } else if (isOnChannel) /*_content == null*/ { DUCE.CompositionNode.SetContent( _proxy.GetHandle(channel), DUCE.ResourceHandle.Null, channel); } } ////// GetDrawing - Returns the drawing content of this Visual. /// ////// Changes to this DrawingGroup will not be propagated to the Visual's content. /// This method is called by both the Drawing property, and VisualTreeHelper.GetDrawing() /// internal override DrawingGroup GetDrawing() { // VerifyAPIReadOnly(); DrawingGroup drawingGroupContent = null; // Convert our content to a DrawingGroup, if content exists if (_content != null) { drawingGroupContent = DrawingServices.DrawingGroupFromRenderData((RenderData) _content); } return drawingGroupContent; } ////// Drawing - Returns the drawing content of this Visual. /// ////// Changes to this DrawingGroup will not propagated to the Visual's content. /// public DrawingGroup Drawing { get { return GetDrawing(); } } } } // 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
- DataPagerField.cs
- SettingsPropertyNotFoundException.cs
- SchemaInfo.cs
- ListItemCollection.cs
- Timeline.cs
- LogicalExpr.cs
- StringUtil.cs
- TrustVersion.cs
- ScrollViewerAutomationPeer.cs
- UriTemplateClientFormatter.cs
- SemanticKeyElement.cs
- BoundingRectTracker.cs
- ConfigurationSectionHelper.cs
- NonParentingControl.cs
- OciEnlistContext.cs
- ResourcePermissionBase.cs
- ProviderSettingsCollection.cs
- rsa.cs
- SslStream.cs
- ZoomPercentageConverter.cs
- XsltLibrary.cs
- EntityDataSourceWrapper.cs
- HttpHandler.cs
- WindowsEditBox.cs
- DataGridColumnReorderingEventArgs.cs
- ServiceOperationWrapper.cs
- WizardSideBarListControlItem.cs
- CFStream.cs
- _DisconnectOverlappedAsyncResult.cs
- ThreadStartException.cs
- smtpconnection.cs
- CodeAttributeDeclarationCollection.cs
- precedingquery.cs
- RoleService.cs
- MethodToken.cs
- MultiBindingExpression.cs
- AccessDataSourceView.cs
- SafeFindHandle.cs
- Transform3D.cs
- DbConnectionPoolOptions.cs
- EntityViewGenerator.cs
- DataColumnCollection.cs
- DataSourceCacheDurationConverter.cs
- DataServiceBuildProvider.cs
- PagePropertiesChangingEventArgs.cs
- MsmqReceiveParameters.cs
- FilteredDataSetHelper.cs
- ArraySubsetEnumerator.cs
- WCFBuildProvider.cs
- NativeMethods.cs
- _UriSyntax.cs
- UpdatePanel.cs
- SizeConverter.cs
- precedingquery.cs
- SupportsEventValidationAttribute.cs
- ValidateNames.cs
- Link.cs
- HeaderedItemsControl.cs
- XmlnsCompatibleWithAttribute.cs
- GridViewRow.cs
- ICspAsymmetricAlgorithm.cs
- XmlSchemaSimpleContentRestriction.cs
- DatatypeImplementation.cs
- ToolTipAutomationPeer.cs
- TextParagraphCache.cs
- TemplateBamlTreeBuilder.cs
- Parsers.cs
- BordersPage.cs
- ErrorFormatterPage.cs
- IPHostEntry.cs
- SqlDependencyUtils.cs
- KnownColorTable.cs
- RoutingConfiguration.cs
- DefaultTraceListener.cs
- SamlSubjectStatement.cs
- AnnotationComponentManager.cs
- UInt32.cs
- StreamGeometry.cs
- TransformGroup.cs
- OuterGlowBitmapEffect.cs
- MobileControlDesigner.cs
- AssemblyNameProxy.cs
- SqlCommandSet.cs
- BitmapFrameDecode.cs
- DataServiceQueryOfT.cs
- DBSchemaTable.cs
- Condition.cs
- ListItemCollection.cs
- EventDescriptorCollection.cs
- DoWorkEventArgs.cs
- FunctionMappingTranslator.cs
- InstallerTypeAttribute.cs
- DesignerView.xaml.cs
- WinEventTracker.cs
- PnrpPeerResolver.cs
- SystemColors.cs
- ReferencedCollectionType.cs
- SqlGenericUtil.cs
- CornerRadius.cs
- Brush.cs