Arrows/ArrowLine.cs

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namespace YiYan127.WPF.Arrows
{
    using System.Windows;
    using System.Windows.Media;

    /// <summary>
    /// 两点之间带箭头的直线
    /// </summary>
    public class ArrowLine : ArrowBase
    {
        #region Fields

        /// <summary>
        /// 结束点
        /// </summary>
        public static readonly DependencyProperty EndPointProperty = DependencyProperty.Register(
            "EndPoint",
            typeof(Point),
            typeof(ArrowLine),
            new FrameworkPropertyMetadata(default(Point), FrameworkPropertyMetadataOptions.AffectsMeasure));

        /// <summary>
        /// 线段
        /// </summary>
        private readonly LineSegment lineSegment = new LineSegment();

        #endregion Fields

        #region Properties

        /// <summary>
        /// 结束点
        /// </summary>
        public Point EndPoint
        {
            get { return (Point)this.GetValue(EndPointProperty); }
            set { this.SetValue(EndPointProperty, value); }
        }

        #endregion Properties

        #region Protected Methods

        /// <summary>
        /// 填充Figure
        /// </summary>
        /// <returns>PathSegment集合</returns>
        protected override PathSegmentCollection FillFigure()
        {
            this.lineSegment.Point = this.EndPoint;
            return new PathSegmentCollection
            {
                this.lineSegment
            };
        }

        /// <summary>
        /// 获取开始箭头处的结束点
        /// </summary>
        /// <returns>开始箭头处的结束点</returns>