Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Shapes / Polygon.cs / 1 / Polygon.cs
//---------------------------------------------------------------------------- // File: Polygon.cs // // Description: // Implementation of Polygon shape element. // // History: // 05/30/02 - [....] - Created. // // Copyright (C) 2003 by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System.Windows.Shapes; using System.Diagnostics; using System.Windows.Threading; using System.Windows; using System.Windows.Media; using MS.Internal; using System; namespace System.Windows.Shapes { ////// The polygon shape element /// This element (like all shapes) belongs under a Canvas, /// and will be presented by the parent canvas. /// Since a Polygon is really a polyline which closes its path /// public sealed class Polygon : Shape { #region Constructors ////// Instantiates a new instance of a polygon. /// public Polygon() { } #endregion Constructors #region Dynamic Properties ////// Points property /// public static readonly DependencyProperty PointsProperty = DependencyProperty.Register( "Points", typeof(PointCollection), typeof(Polygon), new FrameworkPropertyMetadata(new FreezableDefaultValueFactory(PointCollection.Empty), FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender)); ////// Points property /// public PointCollection Points { get { return (PointCollection)GetValue(PointsProperty); } set { SetValue(PointsProperty, value); } } ////// FillRule property /// public static readonly DependencyProperty FillRuleProperty = DependencyProperty.Register( "FillRule", typeof(FillRule), typeof(Polygon), new FrameworkPropertyMetadata( FillRule.EvenOdd, FrameworkPropertyMetadataOptions.AffectsRender), new ValidateValueCallback(System.Windows.Media.ValidateEnums.IsFillRuleValid) ); ////// FillRule property /// public FillRule FillRule { get { return (FillRule)GetValue(FillRuleProperty); } set { SetValue(FillRuleProperty, value); } } #endregion Dynamic Properties #region Protected Methods and properties ////// Get the polygon that defines this shape /// protected override Geometry DefiningGeometry { get { return _polygonGeometry; } } #endregion #region Internal Methods internal override void CacheDefiningGeometry() { PointCollection pointCollection = Points; PathFigure pathFigure = new PathFigure(); // Are we degenerate? // Yes, if we don't have data if (pointCollection == null) { _polygonGeometry = Geometry.Empty; return; } // Create the polygon PathGeometry // if (pointCollection.Count > 0) { pathFigure.StartPoint = pointCollection[0]; if (pointCollection.Count > 1) { Point[] array = new Point[pointCollection.Count - 1]; for (int i = 1; i < pointCollection.Count; i++) { array[i - 1] = pointCollection[i]; } pathFigure.Segments.Add(new PolyLineSegment(array, true)); } pathFigure.IsClosed = true; } PathGeometry polygonGeometry = new PathGeometry(); polygonGeometry.Figures.Add(pathFigure); // Set FillRule polygonGeometry.FillRule = FillRule; _polygonGeometry = polygonGeometry; } #endregion Internal Methods #region Private Methods and Members private Geometry _polygonGeometry; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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