Polyline.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Shapes / Polyline.cs / 1305600 / Polyline.cs
                        

                        
                            //---------------------------------------------------------------------------- 
// File: Polyline.cs
//
// Description:
// Implementation of Polyline 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 Polyline shape element 
    /// This element (like all shapes) belongs under a Canvas,
    /// and will be presented by the parent canvas. 
    /// 
    public sealed class Polyline : Shape
    {
 
        #region Constructors
 
        ///  
        /// Instantiates a new instance of a Polyline.
        ///  
        public Polyline()
        {
        }
 
        #endregion Constructors
 
        #region Dynamic Properties 

        ///  
        /// Points property
        /// 
        public static readonly DependencyProperty PointsProperty = DependencyProperty.Register(
                "Points", typeof(PointCollection), typeof(Polyline), 
                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(Polyline),
            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 polyline that defines this shape
        /// 
        protected override Geometry DefiningGeometry
        { 
            get
            { 
                return _polylineGeometry; 
            }
        } 

        #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) 
            {
                _polylineGeometry = Geometry.Empty; 
                return; 
            }
 
            // Create the Polyline PathGeometry
            // ISSUE-[....]-07/11/2003 - Bug 859068
            // The constructor for PathFigure that takes a PointCollection is internal in the Core
            // so the below causes an A/V. Consider making it public. 
            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)); 
                }
            }

            PathGeometry polylineGeometry = new PathGeometry(); 
            polylineGeometry.Figures.Add(pathFigure);
 
            // Set FillRule 
            polylineGeometry.FillRule = FillRule;
 
            if (polylineGeometry.Bounds == Rect.Empty)
            {
                _polylineGeometry = Geometry.Empty;
            } 
            else
            { 
                _polylineGeometry = polylineGeometry; 
            }
        } 

        #endregion Internal methods

        #region Private Methods and Members 

        private Geometry _polylineGeometry; 
 
        #endregion
   } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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