增加onPointerClickPie和onPointerClickBar回调

Runtime/API/PieChart_API.cs

@@ -0,0 +1,22 @@
+/******************************************/
+/*                                        */
+/*     Copyright (c) 2018 monitor1394     */
+/*     https://github.com/monitor1394     */
+/*                                        */
+/******************************************/
+
+using UnityEngine;
+using System;
+using UnityEngine.EventSystems;
+
+namespace XCharts
+{
+    public partial class PieChart
+    {
+        /// <summary>
+        /// the callback function of click pie area.
+        /// 点击饼图区域回调。参数：PointerEventData，SerieIndex，SerieDataIndex
+        /// </summary>
+        public Action<PointerEventData, int, int> onPointerClickPie { set { m_OnPointerClickPie = value; m_ForceOpenRaycastTarget = true; } }
+    }
+}