Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / ArcSegment.cs / 1305600 / ArcSegment.cs
//-------------------------------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // Description: Impelementation of ArcSegment // // History: // //------------------------------------------------------------------------------------------------- using MS.Internal; using MS.Internal.PresentationCore; using System; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Text; using System.Security; using System.Security.Permissions; using System.Text.RegularExpressions; using System.Windows.Media; using System.Windows; using System.Windows.Media.Composition; using System.Windows.Media.Animation; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { ////// ArcSegment /// public sealed partial class ArcSegment : PathSegment { #region Constructors ////// /// public ArcSegment() { } ////// /// public ArcSegment( Point point, Size size, double rotationAngle, bool isLargeArc, SweepDirection sweepDirection, bool isStroked) { Size = size; RotationAngle = rotationAngle; IsLargeArc = isLargeArc; SweepDirection = sweepDirection; Point = point; IsStroked = isStroked; } #endregion #region AddToFigure ////// Critical: This code calls into MilUtility_ArcToBezier which has an unmanaged code elevation /// TreatAsSafe: Adding a figure is considered safe in partial trust. /// [SecurityCritical,SecurityTreatAsSafe] internal override void AddToFigure( Matrix matrix, // The transformation matrid PathFigure figure, // The figure to add to ref Point current) // In: Segment start point, Out: Segment endpoint, neither transformed { Point endPoint = Point; if (matrix.IsIdentity) { figure.Segments.Add(this); } else { // The arc segment is approximated by up to 4 Bezier segments unsafe { int count; Point* points = stackalloc Point[12]; Size size = Size; Double rotation = RotationAngle; MilMatrix3x2D mat3X2 = CompositionResourceManager.MatrixToMilMatrix3x2D(ref matrix); Composition.MilCoreApi.MilUtility_ArcToBezier( current, // =start point size, rotation, IsLargeArc, SweepDirection, endPoint, &mat3X2, points, out count); // = number of Bezier segments Invariant.Assert(count <= 4); // To ensure no buffer overflows count = Math.Min(count, 4); bool isStroked = IsStroked; bool isSmoothJoin = IsSmoothJoin; // Add the segments if (count > 0) { for (int i = 0; i < count; i++) { figure.Segments.Add(new BezierSegment( points[3*i], points[3*i + 1], points[3*i + 2], isStroked, (i < count - 1) || isSmoothJoin)); // Smooth join between arc pieces } } else if (count == 0) { figure.Segments.Add(new LineSegment(points[0], isStroked, isSmoothJoin)); } } // Update the last point current = endPoint; } } #endregion ////// SerializeData - Serialize the contents of this Segment to the provided context. /// internal override void SerializeData(StreamGeometryContext ctx) { ctx.ArcTo(Point, Size, RotationAngle, IsLargeArc, SweepDirection, IsStroked, IsSmoothJoin); } internal override bool IsCurved() { return true; } ////// Creates a string representation of this object based on the format string /// and IFormatProvider passed in. /// If the provider is null, the CurrentCulture is used. /// See the documentation for IFormattable for more information. /// ////// A string representation of this object. /// internal override string ConvertToString(string format, IFormatProvider provider) { // Helper to get the numeric list separator for a given culture. char separator = MS.Internal.TokenizerHelper.GetNumericListSeparator(provider); return String.Format(provider, "A{1:" + format + "}{0}{2:" + format + "}{0}{3}{0}{4}{0}{5:" + format + "}", separator, Size, RotationAngle, IsLargeArc ? "1" : "0", SweepDirection == SweepDirection.Clockwise ? "1" : "0", Point); } // // This property // 1. Finds the correct initial size for the _effectiveValues store on the current DependencyObject // 2. This is a performance optimization // internal override int EffectiveValuesInitialSize { get { return 6; } } ////// For the purposes of this class, Size.Empty should be treated as if it were Size(0,0). /// private static object CoerceSize(DependencyObject d, object value) { if (((Size)value).IsEmpty) { return new Size(0,0); } else { return value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- HttpHeaderCollection.cs
- EntityDataSourceStatementEditorForm.cs
- CircleEase.cs
- ElementHostAutomationPeer.cs
- UserControlBuildProvider.cs
- DataGridViewComboBoxCell.cs
- TimelineClockCollection.cs
- RepeatInfo.cs
- ContentValidator.cs
- SQLSingle.cs
- GeneralTransform2DTo3DTo2D.cs
- MatrixTransform.cs
- MouseEventArgs.cs
- TextInfo.cs
- QilXmlWriter.cs
- ExpressionConverter.cs
- EmptyCollection.cs
- DoubleStorage.cs
- GeometryHitTestResult.cs
- ObjectViewEntityCollectionData.cs
- PartitionerQueryOperator.cs
- PartitionedDataSource.cs
- DirectoryObjectSecurity.cs
- SqlColumnizer.cs
- XmlSchemaSimpleContentRestriction.cs
- DesignerCalendarAdapter.cs
- Matrix3DStack.cs
- XmlSchema.cs
- DotExpr.cs
- PenLineJoinValidation.cs
- XsltException.cs
- WebResourceAttribute.cs
- BinaryParser.cs
- ColorConvertedBitmap.cs
- Drawing.cs
- MergablePropertyAttribute.cs
- ImageDrawing.cs
- ReadWriteObjectLock.cs
- LeaseManager.cs
- CategoryNameCollection.cs
- ButtonBaseAutomationPeer.cs
- ResourceReader.cs
- DateTimeConverter2.cs
- ScriptMethodAttribute.cs
- PseudoWebRequest.cs
- DiagnosticTraceSource.cs
- MetadataFile.cs
- DodSequenceMerge.cs
- PersonalizableTypeEntry.cs
- Barrier.cs
- BindingFormattingDialog.cs
- VideoDrawing.cs
- RoleService.cs
- DesignTimeTemplateParser.cs
- KeyInfo.cs
- GPRECT.cs
- SimpleRecyclingCache.cs
- TextServicesCompartment.cs
- SurrogateEncoder.cs
- RoleBoolean.cs
- TextParagraphView.cs
- FragmentNavigationEventArgs.cs
- SessionPageStatePersister.cs
- HttpResponseWrapper.cs
- XmlSchemaObjectTable.cs
- ContentElementAutomationPeer.cs
- TagPrefixInfo.cs
- DbParameterHelper.cs
- XDeferredAxisSource.cs
- Transform.cs
- HtmlInputSubmit.cs
- UniqueEventHelper.cs
- BitmapEffectDrawingContextState.cs
- Timeline.cs
- ThreadAttributes.cs
- BufferedGraphicsContext.cs
- StructuralCache.cs
- XmlLanguage.cs
- ContentElement.cs
- ServiceDiscoveryBehavior.cs
- DispatcherHookEventArgs.cs
- TreeViewHitTestInfo.cs
- QuaternionAnimation.cs
- WebScriptServiceHostFactory.cs
- WebServiceParameterData.cs
- TriggerBase.cs
- TableCell.cs
- SequentialActivityDesigner.cs
- SqlClientWrapperSmiStreamChars.cs
- XmlReaderDelegator.cs
- SignerInfo.cs
- ZipIOCentralDirectoryFileHeader.cs
- DataGridRelationshipRow.cs
- ResourceContainer.cs
- X509UI.cs
- Expression.cs
- dtdvalidator.cs
- ExplicitDiscriminatorMap.cs
- MeshGeometry3D.cs
- WebPartVerbCollection.cs