DrawTool多重笔之前奏 => 通过InkAnalyzer实现图形识别

    /// <summary>
    /// 图形识别类
    /// </summary>
    public class ShapeRecogniser
    {
        public InkAnalyzer _inkAnalyzer = null;

        private ShapeRecogniser()
        {
            this._inkAnalyzer = new InkAnalyzer
            {
                AnalysisModes = AnalysisModes.AutomaticReconciliationEnabled
            };
        }

        /// <summary>
        /// 根据笔迹集合返回图形名称字符串
        /// </summary>
        /// <param name="strokeCollection"></param>
        /// <returns></returns>
        public string Recognition(StrokeCollection strokeCollection)
        {
            if (strokeCollection == null)
            {
                MessageBox.Show("dddddd");
                return null;
            }

            string result = null;
            try
            {
                this._inkAnalyzer.AddStrokes(strokeCollection);
                if (this._inkAnalyzer.Analyze().Successful)
                {
                    result = _internalAnalyzer(this._inkAnalyzer);
                    this._inkAnalyzer.RemoveStrokes(strokeCollection);
                }
            }
            catch (System.Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
            }

            return result;
        }

        /// <summary>
        /// 实现笔迹的分析，返回图形对应的字符串
        /// 你在实际的应用中根据返回的字符串来生成对应的Shape
        /// </summary>
        /// <param name="ink"></param>
        /// <returns></returns>
        private string _internalAnalyzer(InkAnalyzer ink)
        {
            try
            {
                ContextNodeCollection nodecollections = ink.FindNodesOfType(ContextNodeType.InkDrawing);
                foreach (ContextNode node in nodecollections)
                {
                    InkDrawingNode drawingNode = node as InkDrawingNode;
                    if (drawingNode != null)
                    {
                        return drawingNode.GetShapeName();
                    }
                }
            }
            catch (System.Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
            }

            return null;
        }


        private static ShapeRecogniser instance = null;
        public static ShapeRecogniser Instance
        {
            get
            {
                return instance == null ? (instance = new ShapeRecogniser()) : instance;
            }
        }
    }